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Retrosplenial cortex

The retrosplenial cortex (RSC) is a medial parietal region of the cerebral cortex in mammals, encompassing Brodmann areas 29 and 30 in humans, situated posterior to the corpus callosum and adjacent to the parieto-occipital sulcus.^[1] This structure bridges the parietal, occipital, and temporal lobes, forming part of the posterior cingulate cortex and serving as a key interface between allocortical and neocortical systems.^[1] In rodents, the RSC extends rostro-caudally over approximately 8 mm and reaches the dorsal brain surface, differing slightly from its more buried position in the human callosal sulcus.^[2] The RSC exhibits notable heterogeneity in its cytoarchitecture and subdivisions, which contribute to its diverse functions. In humans and primates, it includes granular (area 29, with distinct layers of granule cells) and dysgranular (area 30, with less defined lamination) regions, often further parsed into subareas like 29a–d based on connectivity patterns.^[1] Rodent RSC is similarly divided into granular (Rga, Rgb) and dysgranular (Rdg) zones, with superficial and deep layers showing specialized inputs and outputs.^[2] These subdivisions enable fine-grained processing, such as anterior regions supporting episodic memory and posterior areas handling spatial tuning.^[3] Extensive connectivity underscores the RSC's integrative role in cognition. It receives afferents from the hippocampus (via subiculum and CA1), anterior and laterodorsal thalamic nuclei, visual cortices (areas 17 and 18), parietal association areas, and prefrontal cortex, while sending efferents to motor regions, the claustrum, and subcortical structures like the mammillary bodies.^[1] In humans, the RSC is a core component of the default mode network, facilitating communication between medial temporal and parietal systems during rest and introspection.^[3] This network supports the propagation of hippocampal sharp-wave ripples to neocortical areas, aiding memory consolidation during sleep.^[3] Functionally, the RSC is pivotal in spatial navigation and memory processes. It encodes both egocentric (self-motion and boundary-based) and allocentric (head direction and positional) reference frames, enabling route planning, path integration, and landmark utilization.^[3] Approximately 10% of RSC neurons function as head-direction cells, providing a sense of orientation independent of visual cues.^[1] Beyond navigation, the RSC contributes to episodic memory retrieval, temporal sequence encoding, and contextual fear conditioning, particularly in trace (delayed) paradigms where cues must be associated over time.^[2] Lesions disrupt allocentric spatial memory, remote contextual recall, and perspective-taking, highlighting its necessity for translating sensory inputs into adaptive behaviors.^[1]

Anatomy

Location and Gross Structure

The retrosplenial cortex (RSC) comprises Brodmann areas 29 and 30 within the posterior cingulate region of the brain. Area 29 is characterized as granular, while area 30 is dysgranular, reflecting differences in their cytoarchitectonic features.^[4]^[5] The RSC is positioned on the medial surface of the occipital-parietal transition zone, wrapping around the caudal aspect of the splenium of the corpus callosum and extending into the callosal sulcus. It lies adjacent to the calcarine sulcus and borders structures such as the precuneus and parahippocampal gyrus. In humans, the RSC forms a relatively small subregion of the cingulate gyrus, deeply embedded and less accessible for direct study. In contrast, in rodents like rats, it occupies a large cortical territory, spanning nearly half the rostro-caudal length of the cerebrum.^[4]^[5]^[6] Across species, the RSC exhibits notable size variations that align with evolutionary expansions in associative functions, particularly in primates where its connectivity and complexity increase to support advanced spatial and episodic processing. The region displays a basic six-layered laminar organization typical of neocortex, with area 29 featuring a prominent, densely packed granular layer IV that distinguishes it from the more dysgranular layer IV in area 30.^[5]^[7]

Cytoarchitecture and Subdivisions

The retrosplenial cortex (RSC) is characterized by its distinct cytoarchitecture, which distinguishes it from adjacent cortical regions and supports its role as a transitional area between allocortex and neocortex. It is primarily divided into two main subdivisions: the granular retrosplenial cortex (RSCg, corresponding to Brodmann area 29), which features a prominent layer IV composed of densely packed granule cells, and the dysgranular retrosplenial cortex (RSCd, corresponding to Brodmann area 30), which exhibits less defined layering with a sparser and more irregular layer IV.^[8]^[9] These differences in granularity reflect variations in cellular packing density and laminar organization, with RSCg showing more pronounced neocortical features and RSCd displaying transitional proisocortical traits.^[10] In rodents, the granular RSC is further subdivided into rostral (Rga) and caudal (Rgb) portions based on connectivity and cytoarchitectonic differences, while the dysgranular RSC (Rdg) corresponds to area 30. These are delineated using histological techniques such as Nissl staining, which highlights cellular morphology and laminar boundaries, often complemented by myelin-specific stains to reveal connectivity-related differences.^[9]^[10] Layer-specific architectural features contribute to the RSC's organizational complexity. Layer II and III contain pyramidal cells with extensive dendritic arborization, facilitating intra- and inter-regional associations, while layer V houses larger pyramidal neurons suited for long-range projections. Layer VI, particularly prominent in RSCd, consists of fusiform cells that interface with subcortical inputs.^[9]^[8] Species differences in RSC are notable, with rodents exhibiting a larger and more dorsally positioned RSC compared to the more compact and embedded structure in primates within the cingulate gyrus. Both rodents and primates show similar granular and dysgranular subdivisions.^[11]^[9] In rodents, the RSC occupies a larger proportion of the posterior cingulate, with clearer laminar distinctions, while in primates, it is more compact and embedded within the cingulate gyrus.^[11]

Connectivity

Afferent Inputs

The retrosplenial cortex (RSC) receives convergent afferent inputs from multiple brain regions, enabling the integration of sensory, spatial, and mnemonic signals essential for navigation and contextual processing. These inputs originate primarily from visual cortical areas, the hippocampal formation, and thalamic nuclei, with additional contributions from the postsubiculum and prefrontal cortex.^[5] Visual inputs to the RSC arise predominantly from primary visual cortex (area V1) and secondary areas such as V2, conveying egocentric spatial representations of landmarks and environmental features. These projections provide retinotopically organized information, with RSC neurons showing tuning to stable visual cues that support scene recognition and self-motion integration. Secondary visual areas, including the posteromedial visual cortex, further contribute processed spatiotemporal details, enhancing the RSC's role in bridging visual perception with spatial updating.^[12]^[5] The hippocampal formation supplies critical allocentric spatial and contextual data to the RSC via projections from the subiculum and CA1 region. Subicular inputs, in particular, transmit place-related signals and episodic memory traces, while CA1 contributions are sparser but convey recent contextual associations. These glutamatergic fibers, marked by vesicular glutamate transporter 1 (VGLUT1), which distinguishes them from thalamic inputs labeled by VGLUT2, facilitate the RSC's encoding of stable environmental layouts. The postsubiculum adds influences from head-direction, border, and grid cells, enriching the RSC with self-referential spatial metrics.^[13]^[5] Thalamic afferents from the anterior thalamic nuclei (ATN) deliver head-direction signals, which are vital for orienting spatial representations, while the lateral dorsal nucleus provides complementary visuospatial cues. These projections, often glutamatergic, originate from neurons tuned to directional heading and environmental landmarks, supporting the RSC's alignment of internal maps with external cues. Prefrontal cortical inputs, from regions like the anterior cingulate and orbitofrontal cortex, impose executive control and value-based modulation on these spatial signals.^[14]^[5] Recent studies highlight the synaptic ubiquity of hippocampal and visual inputs across RSC circuits, underscoring their pervasive drive. Optogenetic silencing of hippocampal afferents to the RSC, using archaerhodopsin-3 in rats during spatial working memory tasks, disrupts retrieval performance for up to three trials post-stimulation, hastening decision-making and impairing accuracy without affecting motivation. These findings reveal the inputs' role in sustaining memory stability, with effects persisting beyond immediate silencing. Afferent organization is layer-specific: superficial layers (1–3) predominantly receive thalamic and visual projections, targeting dendritic tufts for excitatory integration, whereas deep layers (5–6) are more strongly innervated by hippocampal and subicular inputs, including GABAergic components for inhibitory modulation.^[15]^[13]

Efferent Projections

The retrosplenial cortex (RSC) sends efferent projections to the hippocampal formation, including targeted inputs to CA1 and the subiculum, which support spatial mapping and memory processes. These projections originate from distinct subdivisions of the RSC, with the dysgranular RSC targeting specific terminal fields within the subiculum and granular RSC extending to CA1 regions. RSC also sends projections to subcortical structures, including the mammillary bodies (often indirectly via thalamic relays) and the claustrum, supporting broader mnemonic and sensory integration.^[16]^[3]^[1] RSC outputs also reach the anterior thalamic nuclei and postsubiculum, facilitating integration of head direction and boundary-related signals. Projections to the anterior thalamus arise primarily from layer VI neurons across RSC areas 29a–d, organized topographically to align with thalamic subnuclei.^[17]^[3] Connections to the postsubiculum further link RSC with circuits involved in orientation encoding.^[3] Efferents from RSC extend to visual association areas, including higher-order regions beyond primary visual cortex, contributing to scene representation. In primates, these include projections to areas involved in complex visual processing, analogous to rodent links with secondary visual cortices.^[3] RSC also projects to prefrontal regions, such as the secondary motor cortex (M2) and anterior cingulate cortex, with layer V pyramidal cells mediating these long-range cortical outputs.^[18]^[19] Layer VI neurons specifically target thalamic structures, underscoring laminar organization in subcortical versus cortical projections.^[20]^[21]

Neurophysiology

Neuronal Cell Types

The retrosplenial cortex (RSC) primarily consists of excitatory pyramidal neurons, which are the predominant neuronal population and are distributed across layers II/III and V. These neurons feature characteristic triangular somata and extensive spiny apical and basal dendrites that facilitate the integration of excitatory synaptic inputs from connected regions. In rodents, small pyramidal neurons in layer II of the granular RSC exhibit hyperexcitability, enabling persistent signaling, while larger pyramidal cells in deeper layers contribute to output projections.^[22]^[23] Inhibitory interneurons, comprising approximately 20% of neurons in the RSC, provide local modulation of cortical circuits through GABAergic signaling. Prominent among these are parvalbumin-positive (PV+) basket cells, which form perisomatic synapses on pyramidal neurons to regulate their excitability and synchronize network activity. These interneurons are enriched in layers II/III and V, with PV+ cells showing dense expression in the granular RSC of mice and rats.^[24]^[25] The RSC also harbors specialized neuronal populations tuned to spatial features, including head direction (HD) cells, which constitute about 8.5% of recorded neurons in the rat granular RSC and display selective activation based on the animal's facing direction. Border cells in the RSC encode the egocentric positions of environmental boundaries, such as walls, relative to the animal's body orientation. Additionally, grid-like cells exhibit modular spatial selectivity resembling periodic lattices, contributing to the representation of allocentric space. These functional cell types are primarily glutamatergic pyramidal neurons.^[26]^[27]^[28] Non-neuronal glial cells support RSC function, with astrocytes maintaining synaptic homeostasis through glutamate uptake and metabolic provisioning, and oligodendrocytes forming myelin sheaths around axons to enhance signal conduction efficiency. Single-cell transcriptomics reveals distinct astrocyte and oligodendrocyte subtypes in the mouse RSC, underscoring their role in circuit maintenance.^[29] Species differences in RSC neuronal composition are evident, particularly for HD cells, which are more prevalent in rodents (around 8-10% of recorded neurons) compared to humans, where their presence is inferred from functional imaging showing weaker directional selectivity in the homologous region. Pyramidal and interneuron proportions appear conserved across mammals, though human RSC exhibits broader laminar diversity in transcriptomic profiles.^[30]^[31]

Activity Patterns and Responses

Neurons in the retrosplenial cortex (RSC) include head direction (HD) cells that exhibit characteristic Gaussian-shaped tuning curves, with firing rates peaking sharply at the animal's preferred heading direction and tapering off symmetrically in other directions.^[32] These HD cells maintain stable preferred directions across diverse environments, as long as consistent visual landmarks are present to anchor the signal.^[33] Such stability ensures reliable representation of orientation, with directional selectivity persisting even during passive rotations or in the absence of self-motion cues.^[32] Beyond pure HD tuning, many RSC neurons display place-like firing patterns, activating selectively at particular locations within an open field or arena, akin to hippocampal place cells but often broader in spatial scale. These place-like responses frequently integrate with HD signals, forming conjunctive cells that fire at specific position-heading combinations, thereby linking local spatial information with global orientation.^[34] RSC neurons also modulate their activity based on movement parameters, showing elevated firing rates during locomotion compared to rest, particularly in head-fixed paradigms where rodents run on treadmills.^[34] This speed-related modulation is evident in a majority of recorded units, with firing often scaling positively with running velocity. The development of HD cell tuning in the RSC follows a learning-dependent trajectory, with immature signals emerging postnatally in rodents around 2-4 weeks of age and becoming refined through environmental exploration and visual experience.^[35] In humans, functional magnetic resonance imaging (fMRI) reveals analogous patterns, with blood-oxygen-level-dependent (BOLD) signals in the RSC exhibiting directional selectivity during virtual navigation tasks that require tracking heading relative to environmental cues.^[14] Recent optogenetic studies in rodents demonstrate that silencing RSC activity disrupts these response patterns, leading to prolonged impairments in tasks reliant on directional and spatial coding.^[36]

Functions

The retrosplenial cortex (RSC) plays a pivotal role in spatial navigation by facilitating the translation between egocentric (body-centered) and allocentric (world-centered) spatial representations, enabling organisms to orient and move effectively through environments. This transformation is essential for integrating self-motion cues with external references, allowing for accurate path planning and updating of position. Studies in rodents demonstrate that RSC lesions impair the ability to convert egocentric sensory information into allocentric maps, leading to deficits in tasks requiring spatial reorientation. A key mechanism involves the integration of visual cues with head direction signals within the RSC to support path integration, where internal estimates of distance and direction are combined with environmental landmarks. Approximately 10% of RSC neurons function as head direction cells, which maintain a stable sense of orientation and are modulated by visual inputs to correct for drift in self-motion estimates. This integration is crucial for maintaining directional stability during navigation, as evidenced by RSC's contribution to updating hippocampal place cell activity based on both idiothetic (self-motion) and allothetic (external cue) information. In rodents, RSC supports the fusion of these signals, allowing for robust path integration even in varying lighting conditions. The RSC is particularly important for landmark-based navigation, where it processes the stability and significance of environmental features to guide route selection. Rodent lesion studies reveal deficits in cue-utilization tasks, such as the Morris water maze, following RSC inactivation, with animals showing impaired reliance on distal landmarks for goal-directed movement, though performance recovers with extended training suggesting compensatory mechanisms. In humans, functional magnetic resonance imaging (fMRI) studies show RSC activation during virtual reality navigation tasks, particularly when integrating topographical maps with current position, highlighting its role in scene-based orientation distinct from hippocampal contributions.^[37] Recent advances from 2022 to 2025 underscore the RSC's involvement in grid cell networks and border detection for efficient routing. RSC projections to the medial entorhinal cortex enhance grid cell representations by incorporating visual landmarks, sharpening metric scaling for precise path integration during movement. Additionally, RSC border cells detect environmental boundaries using egocentric tuning, phase-locked to theta rhythms, which aids in route optimization by signaling potential barriers or decision points. This mechanistic flexibility allows the RSC to switch between cue-driven strategies (e.g., landmark reliance in lit environments) and self-motion-based approaches (e.g., in darkness), adapting to sensory availability for flexible navigation.^[13]

Memory and Contextual Processing

The retrosplenial cortex (RSC) contributes to episodic memory by facilitating the encoding of scene-rich events through its reciprocal connections with the hippocampus. These interactions enable the integration of spatial and temporal details into coherent memory traces, as evidenced by coordinated neural activity between RSC and hippocampal CA1 during sharp-wave ripples in non-REM sleep, which supports spatial memory consolidation.^[38] In rodents, RSC lesions impair the retrieval of contextual fear memories formed via hippocampal-dependent pathways, underscoring its role in linking episodic elements like location and event timing.^[39] Human neuroimaging further reveals enhanced RSC-hippocampus coupling during episodic retrieval tasks, where theta oscillations from the hippocampus modulate RSC activity to reconstruct past experiences.^[40] In contextual fear conditioning, the RSC is necessary for cue-specific aversive learning in rodents, particularly through its dysgranular subdivision (RSCd). Pharmacological inactivation of RSCd disrupts memory retrieval at both 5 hours and 24 hours post-training, reducing freezing responses, while granular RSC (RSCg) inactivation does not impair performance.^[41] This necessity arises from RSCd's role as a hub modulating hippocampal-amygdalar connectivity, enhancing network efficiency for encoding context-shock associations.^[41] Lesions confined to RSC also abolish context discrimination in fear paradigms, indicating its selective involvement in processing environmental configurations over discrete cues.^[42] Human studies demonstrate RSC activation during scene construction, the process of mentally generating spatial layouts from memory or imagination. Functional MRI shows RSC engagement peaks when participants imagine complex scenes, such as navigating imagined environments, distinguishing it from mere perception by anterior-posterior gradients in medial parietal regions.^[43] In tasks requiring vivid scene recall, RSC activity correlates with the richness of spatial details, forming part of a broader network including the hippocampus for episodic simulation.^[44] This activation supports the construction of flexible, context-bound mental models essential for autobiographical memory.^[44] The RSC integrates multisensory contexts—combining visual, spatial, and emotional inputs—for memory consolidation, acting as a relay between sensory cortices and limbic structures. It processes cross-modal associations, such as linking auditory tones with visual scenes in preconditioning tasks, to form stable engrams during sleep-dependent replay.^[38] Emotional valence from amygdalar inputs further modulates RSC consolidation of multisensory traces, as seen in enhanced activity following aversive events.^[39] Recent research from 2021 to 2025 highlights the RSC's role in task-related memory updating, with increased hippocampus-RSC interactions during phasic REM sleep correlating with fear memory performance via theta modulation.^[40] Time cells in RSC encode temporal sequences during episodic-like tasks, complementing hippocampal coding for context-dependent recall.^[45] Optogenetic studies further show that silencing hippocampal inputs disrupts RSC-dependent working memory for spatial contexts, impairing trace conditioning retrieval.^[39] These findings emphasize dynamic RSC-hippocampus loops for adaptive memory processes. As a hub for associative learning, the RSC links environmental cues to outcomes by encoding stable stimulus-stimulus and cue-context pairings. It is essential for trace fear conditioning and remote memory retrieval of cue-specific associations, with lesions impairing integration of distal cues like tones with contexts.^[2] In sensory preconditioning, RSC supports higher-order associations between neutral stimuli, facilitating subsequent Pavlovian responses.^[2] This function relies on gradual engagement over trials, strengthening cue-outcome bindings in dynamic environments.^[2]

Clinical Significance

Associated Pathologies

The retrosplenial cortex (RSC) exhibits early pathological changes in Alzheimer's disease (AD), including accumulation of amyloid plaques and tau tangles, which often precede overt hippocampal alterations in transgenic models. In Tg2576 mice, RSC dysfunction, marked by reduced cytochrome oxidase activity and c-Fos expression, emerges at 5 months of age, well before amyloid plaque formation around 10-12 months, suggesting that soluble amyloid-beta species disrupt RSC function prior to plaque deposition. Tau pathology in the RSC is also observed early, propagating from the entorhinal cortex and hippocampus via the cingulum bundle, with RSC involvement in the posterior medial system contributing to initial neocortical spread.^[46]^[47]^[48] In mild cognitive impairment (MCI), a prodromal stage of AD, reduced RSC volume correlates with episodic memory decline, reflecting early atrophy comparable to that in the posterior cingulate and hippocampus. Voxel-based morphometry studies show RSC thinning in amnestic MCI patients, associating with impaired performance on verbal and spatial memory tasks, independent of hippocampal volume loss. This atrophy disrupts contextual processing networks, exacerbating memory deficits before full AD progression. A 2024 study further demonstrated that retrosplenial hypometabolism precedes and predicts progression from MCI to AD.^[49]^[50]^[51] Lesions to the RSC cause topographical disorientation, a syndrome characterized by selective impairment in using landmarks for navigation while preserving route knowledge and object recognition. Patients with RSC damage report difficulty deriving direction from environmental cues, leading to heading disorientation and inability to translate local landmarks into a global spatial framework. This deficit arises from disrupted integration of visuospatial inputs, as seen in cases of pure topographical disorientation following focal RSC infarcts.^[52]^[53] RSC damage contributes to amnesia syndromes, particularly anterograde deficits in spatial-episodic memory formation, where patients struggle to encode new contextual associations despite intact semantic knowledge. In rodent models, RSC lesions impair anterograde context memory in fear conditioning tasks, preventing the consolidation of episode-specific details like shock-predictive environments. Human cases, such as those with RSC strokes, exhibit anterograde amnesia for autobiographical events intertwined with spatial elements, underscoring the RSC's role in binding scenes to personal experiences.^[54]^[55] Psychiatric disorders involving the RSC include dissociative states and schizophrenia, linked to altered activity in layer 5 neurons. In dissociative anesthesia models, ketamine induces a 1-3 Hz rhythm in RSC layer 5, correlating with altered consciousness and detachment from self and environment. In schizophrenia, altered RSC activity disrupts connectivity with the anterior cingulate, contributing to symptoms like disorganized thought and perceptual anomalies. A 2025 study identified a novel cell type in the RSC associated with schizophrenia, suggesting specific cellular contributions to the disorder.^[56]^[57]^[58] Recent findings from 2024 highlight RSC contributions to aversive conditioning deficits in PTSD models, where impaired RSC function hinders fear extinction and context generalization. In fear conditioning paradigms, RSC lesions exaggerate responses to neutral cues, mimicking PTSD hyperarousal, with optogenetic studies showing RSC hyperactivity sustains maladaptive threat memories. These deficits link to broader PTSD symptomatology, including re-experiencing and avoidance, via disrupted episodic-like memory processing.^[59]^[60]

Lesion and Imaging Studies

Lesion studies in rodents have utilized excitotoxic agents such as ibotenic acid to selectively damage neurons in the retrosplenial cortex (RSC), sparing fibers of passage, and have consistently revealed deficits in allocentric spatial memory and navigation tasks, such as the Morris water maze, where animals struggle to use distal cues for orientation. For instance, bilateral RSC lesions impair performance on tasks requiring the integration of spatial information across environments, highlighting the region's role in translating visual landmarks into allocentric representations.^[61] These findings underscore the causal involvement of the RSC in spatial processing, with deficits persisting even after extensive training, unlike more transient impairments from temporary inactivation methods.^[62] In humans, case studies of stroke-induced RSC damage have documented profound navigational disorientation, including difficulties in route planning and landmark-based orientation, often without widespread cognitive impairment.^[63] One notable case involved left retrosplenial hemorrhage leading to directional disorientation, confirmed by fMRI showing disrupted connectivity during spatial tasks, with symptoms partially resolving over time but leaving residual deficits in complex navigation.^[64] Similarly, ischemic strokes affecting the right RSC have resulted in topographic disorientation, where patients fail to recognize familiar environments despite intact basic visuospatial abilities.^[65] Neuroimaging studies using fMRI have demonstrated RSC activation during spatial navigation tasks, such as virtual reality mazes, where increased BOLD signals correlate with successful path integration and scene processing.^[1] PET imaging further supports this, showing RSC hypermetabolism in healthy individuals performing allocentric judgments, but hypoactivation in Alzheimer's disease (AD) patients during similar tasks, linking reduced activity to impaired memory retrieval.^[66] In mild cognitive impairment (MCI), a precursor to AD, voxel-based morphometry (VBM) analyses reveal RSC gray matter atrophy, particularly in Brodmann areas 29 and 30, correlating with early navigational decline and tau accumulation.^[67] Diffusion tensor imaging (DTI) tractography has elucidated RSC connectivity disruptions in navigation impairments, showing reduced fractional anisotropy in white matter tracts linking the RSC to the hippocampus and parietal regions in individuals with spatial deficits.^[68] For example, in older adults with MCI, altered RSC-hippocampal pathways predict poorer performance on real-world navigation tests, emphasizing structural integrity for functional spatial processing.^[69] Recent advances in the 2020s, including optogenetics and chemogenetics, have provided circuit-level insights by silencing RSC inputs. Optogenetic inhibition of hippocampal projections to the RSC in rodents causes prolonged disruptions in spatial working memory, impairing retrieval without affecting encoding, as evidenced by errors in delayed match-to-place tasks.^[15] Chemogenetic silencing of RSC neurons similarly impairs retrieval of contextual fear memories, revealing time-specific roles in memory consolidation and navigation-related learning.^[70] These studies face limitations, including ethical constraints on inducing human lesions, which necessitate reliance on opportunistic cases or animal models for establishing causality, potentially limiting direct translation to human cognition.

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A Posterior–Anterior Distinction between Scene Perception and ...
Jan 23, 2019 · A Posterior–Anterior Distinction between Scene Perception and Scene Construction in Human Medial Parietal Cortex ... retrosplenial cortex ...
[44]
Memory, scene construction, and the human hippocampus - PNAS
Mar 30, 2015 · Neuroimaging studies have identified a large network of brain regions involved in scene construction ... retrosplenial cortex, precuneus ...
[45]
Time Cells in the Retrosplenial Cortex - PMC - NIH
Mar 3, 2024 · Time cells were a prevalent feature of RSC representations, and their time fields were similar to those previously observed in the hippocampus.
[46]
Early-onset dysfunction of retrosplenial cortex precedes overt ... - PMC
These findings indicate that retrosplenial cortex dysfunction occurs during early stages of amyloid production in Tg2576 mice and may contribute to cognitive ...
[47]
https://doi.org/10.1016/j.neuroscience.2010.11.025
[48]
Review Tau trajectory in Alzheimer's disease: Evidence from the ...
Oct 15, 2023 · Hippocampal connectivity with retrosplenial cortex is linked to neocortical tau accumulation and memory function. J. Neurosci.: Off. J. Soc ...Missing: preceding | Show results with:preceding
[49]
The relationship of topographical memory performance to regional ...
This is also true of the MCI-stage of sporadic AD in which there is comparable atrophy of retrosplenial cortex, posterior cingulate cortex and hippocampus (Choo ...
[50]
[PDF] Posterior cingulate cortex atrophy and regional cingulum disruption ...
Aug 6, 2008 · Posterior cingulate cortex atrophy and regional cingulum disruption in mild cognitive impairment and Alzheimer's disease. IL Han Chooa, ...<|control11|><|separator|>
[51]
Topographical Disorientation: Training Improvements
Sep 19, 2019 · Instead, lesions of the retrosplenial cortex lead to heading disorientation: patients lose the sense of direction and are unable to direct ...
[52]
Pure topographic disorientation: A distinctive syndrome with varied ...
TD as an isolated symptom may occur from lesions in a variety of posterior medial locations, including the parahippocampus, splenium, and retrosplenial cortex.<|control11|><|separator|>
[53]
Retrosplenial cortex damage produces retrograde and anterograde ...
Sep 2, 2019 · In Experiment 1, lesions of the RSC resulted in both retrograde and anterograde context amnesia following strong training using the same ...
[54]
Retrosplenial Cortical Contributions to Anterograde and Retrograde ...
Patients with strokes or tumors affecting RSC can also have retrograde and anterograde amnesia and present difficulties with spatial navigation and orientation ...
[55]
Deep posteromedial cortical rhythm in dissociation - Nature
Sep 16, 2020 · Large-scale imaging of neural activity revealed that these dissociative agents elicited a 1–3-Hz rhythm in layer 5 neurons of the retrosplenial ...Missing: states | Show results with:states
[56]
Retrosplenial cortex connectivity in schizophrenia | Request PDF
Aug 6, 2025 · In patients with schizophrenia, activity in the retrosplenial cortex correlated negatively with activity in bilateral anterior cingulate gyrus/ ...
[57]
Retrosplenial cortex and aversive conditioning - Frontiers
Jun 24, 2024 · The rat retrosplenial cortex is required when visual cues are used flexibly to determine location. Behav. Brain Res. 263, 98–107. doi ...
[58]
Role of Retrosplenial Cortex in Processing Stress-Related Context ...
Hyper- or hypoactivation of RSC is found in patients suffering from post-traumatic stress disorder (Liberzon et al., 1999; Sartory et al., 2013), schizophrenia ...Missing: hyperactivity | Show results with:hyperactivity
[59]
Retrosplenial cortex lesions of area Rgb (but not of area Rga) impair ...
Adult, male Sprague–Dawley rats with small, bilateral lesions (ibotenic acid) of the retrosplenial granular cortex were tested for 2 weeks in a repeated ...
[60]
Lesions within the head direction system reduce retrosplenial c-fos ...
... dorso-ventral, −9.2 mm from the top of the dura. ... Vann S.D., Aggleton J.P. Extensive cytotoxic lesions of the rat retrosplenial cortex reveal consistent ...
[61]
The retrosplenial contribution to human navigation - PubMed
The majority of cases follow damage to the right retrosplenial cortex, with Brodmann's area 30 apparently compromised in most cases.Missing: stroke | Show results with:stroke
[62]
Directional Disorientation Following Left Retrosplenial Hemorrhage ...
... Human case studies show that damage to the RSC leads to disorientation in space in addition to memory impairments (Bottini et al., 1990;Takahashi et al., ...
[63]
Interacting networks of brain regions underlie human spatial ...
Consistent with this argument, lesions to retrosplenial cortex profoundly impair one's ability to compute heading direction (Hashimoto et al. 2010), which ...<|control11|><|separator|>
[64]
Cerebral perfusion correlates of conversion to Alzheimer's disease ...
... retrosplenial cortex ... We assessed the effect of gray matter atrophy on the above results with SPM2 using an optimized Voxel-Based Morphometry (VBM) protocol.
[65]
Longitudinal Tau Accumulation and Atrophy in Aging and Alzheimer ...
In OA, FTP binding increased in bilateral temporal lobe and retrosplenial cortex, accompanied by atrophy in the same regions. ... voxel-based morphometry (VBM) ...
[66]
Structural and functional brain network of human retrosplenial cortex
May 1, 2018 · We constructed their structural brain networks based on DTI tractography and functional connectivity (FC) networks based on fMRI to explore the neural bases of ...
[67]
Disrupted Network Topology Contributed to Spatial Navigation ...
Jun 3, 2021 · Mapping anatomical connectivity patterns of human cerebral cortex using in vivo diffusion tensor imaging tractography. Cereb. Cortex 19 524–536.
[68]
Retrosplenial cortex inactivation during retrieval, but not encoding ...
These findings indicate that the RSC contributes to the retrieval, but not encoding, of remotely acquired auditory fear conditioning.