Cerebral Cortex is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
The cerebral cortex is the outermost layer of the [cerebrum[/[brain-regions[/[brain-regions[/[brain-regions[/[brain-regions[/[brain-regions[/[brain-regions[/[brain-regions[/brain-regions and represents the most evolutionarily advanced structure of the mammalian brain. Comprising
approximately 2–4 millimeters in thickness, the cortex contains roughly 16 billion [neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons--TEMP--/entities)--FIX-- and an estimated 100 trillion synapses, making it the most complex neural structure in
the known universe.[2] of cortical surface to fit within the human skull. The
two hemispheres are connected by the [corpus callosum[/brain-regions/[corpus-callosum[/brain-regions/[corpus-callosum[/brain-regions/[corpus-callosum[/brain-regions/[corpus-callosum--TEMP--/brain-regions)--FIX--, a massive white matter fiber bundle enabling interhemispheric communication.[2]
The cerebral cortex is prominently affected in virtually all [neurodegenerative diseases[/[diseases[/[diseases[/[diseases[/[diseases[/[diseases[/[diseases[/[diseases[/diseases, with disease-specific patterns of cortical vulnerability providing critical diagnostic and pathophysiological insights. Understanding the cortex's laminar organization, cell-type composition, and connectivity is essential for elucidating mechanisms of [selective neuronal vulnerability[/[mechanisms[/[mechanisms[/[mechanisms[/[mechanisms[/[mechanisms[/[mechanisms[/[mechanisms[/mechanisms in conditions such as [Alzheimer's disease[/diseases/[alzheimers[/diseases/[alzheimers[/diseases/[alzheimers[/diseases/[alzheimers--TEMP--/diseases)--FIX--, Frontotemporal Dementia, and [Lewy body dementia[/diseases/[lewy-body-dementia[/diseases/[lewy-body-dementia[/diseases/[lewy-body-dementia[/diseases/[lewy-body-dementia--TEMP--/diseases)--FIX--.
The cerebral cortex is traditionally divided into four main lobes, each associated with distinct functional domains:
The frontal lobe occupies approximately one-third of the cortical surface and is located anterior to the central sulcus. Key functional regions include:
- Primary [motor cortex[/brain-regions/[motor-cortex[/brain-regions/[motor-cortex[/brain-regions/[motor-cortex[/brain-regions/[motor-cortex--TEMP--/brain-regions)--FIX-- (M1, Brodmann area 4): Located in the precentral gyrus; controls voluntary movement via the corticospinal tract. [Upper motor neurons[/cell-types/[motor-neurons[/cell-types/[motor-neurons[/cell-types/[motor-neurons[/cell-types/[motor-neurons--TEMP--/cell-types)--FIX-- in layer V project directly to spinal motor [neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons--TEMP--/entities)--FIX--. This region is selectively vulnerable in [ALS[/diseases/[als[/diseases/[als[/diseases/[als[/diseases/[als--TEMP--/diseases)--FIX--.[3]
- Premotor cortex (BA 6): Plans and coordinates complex movements
- Supplementary motor area: Initiates internally generated movements
- Broca's area (BA 44, 45): Critical for speech production and language processing; selectively affected in the nonfluent variant of [primary progressive aphasia[/diseases/[primary-progressive-aphasia[/diseases/[primary-progressive-aphasia[/diseases/[primary-progressive-aphasia[/diseases/[primary-progressive-aphasia--TEMP--/diseases)--FIX--
- Prefrontal cortex: Executive functions, decision-making, working memory, personality, social cognition; early degeneration occurs in behavioral variant [FTD[/diseases/[ftd[/diseases/[ftd[/diseases/[ftd[/diseases/[ftd--TEMP--/diseases)--FIX--
The [parietal lobe[/brain-regions/[parietal-lobe[/brain-regions/[parietal-lobe[/brain-regions/[parietal-lobe[/brain-regions/[parietal-lobe--TEMP--/brain-regions)--FIX-- processes somatosensory information and integrates multimodal sensory inputs:
- Primary somatosensory cortex (S1, BA 1, 2, 3): Processes touch, pressure, temperature, pain, and proprioception
- Somatosensory association cortex: Integrates sensory information for spatial orientation
- Posterior parietal cortex: Visuospatial processing, attention, and navigation; prominently affected in [posterior cortical atrophy[/diseases/[posterior-cortical-atrophy[/diseases/[posterior-cortical-atrophy[/diseases/[posterior-cortical-atrophy[/diseases/[posterior-cortical-atrophy--TEMP--/diseases)--FIX--
- Angular gyrus and supramarginal gyrus: Language, arithmetic, and spatial reasoning; vulnerable in logopenic variant [PPA]
The [temporal lobe[/brain-regions/[temporal-lobe[/brain-regions/[temporal-lobe[/brain-regions/[temporal-lobe[/brain-regions/[temporal-lobe--TEMP--/brain-regions)--FIX-- processes auditory information and is essential for memory and semantic knowledge:
- Primary auditory cortex (A1, BA 41, 42): Processes sound frequency, intensity, and location
- Wernicke's area (BA 22): Language comprehension; affected in [primary progressive aphasia[/diseases/[primary-progressive-aphasia[/diseases/[primary-progressive-aphasia[/diseases/[primary-progressive-aphasia[/diseases/[primary-progressive-aphasia--TEMP--/diseases)--FIX--
- Medial temporal lobe: [hippocampus[/brain-regions/[hippocampus[/brain-regions/[hippocampus[/brain-regions/[hippocampus[/brain-regions/[hippocampus--TEMP--/brain-regions)--FIX-- and adjacent [entorhinal cortex[/brain-regions/[entorhinal-cortex[/brain-regions/[entorhinal-cortex[/brain-regions/[entorhinal-cortex[/brain-regions/[entorhinal-cortex--TEMP--/brain-regions)--FIX-- for memory formation; the earliest site of tau] pathology in AD[4]
- Inferior temporal cortex: Visual object recognition and semantic memory; selectively atrophied in [semantic dementia[/diseases/[semantic-dementia[/diseases/[semantic-dementia[/diseases/[semantic-dementia[/diseases/[semantic-dementia--TEMP--/diseases)--FIX--
- Anterior temporal pole: Social cognition and semantic knowledge; degenerates early in behavioral variant FTD
The [occipital lobe[/brain-regions/[occipital-lobe[/brain-regions/[occipital-lobe[/brain-regions/[occipital-lobe[/brain-regions/[occipital-lobe--TEMP--/brain-regions)--FIX-- is dedicated to visual processing:
- Primary visual cortex (V1, BA 17): Receives input from the lateral geniculate nucleus of the [thalamus[/brain-regions/[thalamus[/brain-regions/[thalamus[/brain-regions/[thalamus[/brain-regions/[thalamus--TEMP--/brain-regions)--FIX--
- Visual association areas (V2–V5): Process motion, color, form, and depth
- Dorsal stream ("where" pathway): Spatial processing; affected in [posterior cortical atrophy[/diseases/[posterior-cortical-atrophy[/diseases/[posterior-cortical-atrophy[/diseases/[posterior-cortical-atrophy[/diseases/[posterior-cortical-atrophy--TEMP--/diseases)--FIX--
- Ventral stream ("what" pathway): Object recognition
The neocortex exhibits a characteristic six-layered laminar organization, with each layer containing distinct neuronal populations and connectivity patterns:[5]
| Layer |
Name |
[Cell Types[/[cell-types[/[cell-types[/[cell-types[/[cell-types[/[cell-types[/[cell-types[/[cell-types[/cell-types |
Key Connections |
Disease Vulnerability |
| I |
Molecular layer |
Sparse [neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons--TEMP--/entities)--FIX--; dendrites and axons |
Horizontal integration fibers |
— |
| II |
External granular |
Small pyramidal [neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons--TEMP--/entities)--FIX-- |
Corticocortical (ipsilateral) |
AD: early tau pathology] in entorhinal cortex |
| III |
External pyramidal |
Medium pyramidal [neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons--TEMP--/entities)--FIX-- |
Corticocortical association fibers |
AD: NFT accumulation; FTD: [TDP-43[/entities/[tdp-43[/entities/[tdp-43[/entities/[tdp-43[/entities/[tdp-43--TEMP--/entities)--FIX-- inclusions |
| IV |
Internal granular |
Spiny stellate cells |
Receives thalamocortical sensory input |
Relatively spared in most dementias |
| V |
Internal pyramidal |
Large pyramidal [neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons--TEMP--/entities)--FIX-- (Betz cells in M1) |
Corticospinal, corticothalamic projections |
ALS: upper motor neuron loss; HD: cortical thinning |
| VI |
Multiform/Polymorphic |
Diverse neuron types |
Corticothalamic feedback projections |
AD: moderate involvement |
This laminar organization enables hierarchical processing, with Layer IV receiving sensory inputs, Layers II/III integrating within cortex, and Layers V/VI sending outputs to
subcortical structures. Single-cell transcriptomic studies have revealed over 100 distinct neuronal subtypes across cortical layers, each with unique vulnerability profiles in
different diseases.[6]
The cortex contains two major neuronal classes:
Excitatory [neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons--TEMP--/entities)--FIX-- (~80%): Primarily [pyramidal neurons[/cell-types/[cortical-pyramidal-neurons[/cell-types/[cortical-pyramidal-neurons[/cell-types/[cortical-pyramidal-neurons[/cell-types/[cortical-pyramidal-neurons--TEMP--/cell-types)--FIX-- that use [glutamate[/entities/[glutamate[/entities/[glutamate[/entities/[glutamate[/entities/[glutamate--TEMP--/entities)--FIX-- as their neurotransmitter. They provide the major excitatory drive and long-range cortical projections.
Inhibitory interneurons (~20%): GABAergic interneurons that provide local circuit inhibition. Key subtypes include:
- [Parvalbumin-positive (PV+) interneurons[/cell-types/[pv-interneurons[/cell-types/[pv-interneurons[/cell-types/[pv-interneurons[/cell-types/[pv-interneurons--TEMP--/cell-types)--FIX--: Fast-spiking basket cells; critical for gamma oscillations. Reduced in AD and schizophrenia.[7]
- [Somatostatin-positive (SST+) interneurons[/cell-types/[sst-interneurons[/cell-types/[sst-interneurons[/cell-types/[sst-interneurons[/cell-types/[sst-interneurons--TEMP--/cell-types)--FIX--: Target dendrites of pyramidal [neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons--TEMP--/entities)--FIX--; regulate dendritic integration
- [VIP+ interneurons[/cell-types/[vip-interneurons[/cell-types/[vip-interneurons[/cell-types/[vip-interneurons[/cell-types/[vip-interneurons--TEMP--/cell-types)--FIX--: Disinhibitory; modulate SST+ and PV+ interneurons
- Chandelier cells: Provide powerful inhibition at the axon initial segment of pyramidal [neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons--TEMP--/entities)--FIX--
Glial cells outnumber [neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons--TEMP--/entities)--FIX-- and include [astrocytes[/cell-types/[astrocytes[/cell-types/[astrocytes[/cell-types/[astrocytes[/cell-types/[astrocytes--TEMP--/cell-types)--FIX--, [oligodendrocytes[/cell-types/[oligodendrocytes[/cell-types/[oligodendrocytes[/cell-types/[oligodendrocytes[/cell-types/[oligodendrocytes--TEMP--/cell-types)--FIX--, and [microglia[/cell-types/microglia.[/cell-types/microglia.[/cell-types/microglia.[/cell-types/microglia.--TEMP--/cell-types)--FIX--
- Horizontal connections: Link nearby regions within the same cortical area
- Vertical connections: Connect different layers within a column
- Association fibers: Connect different cortical areas within the same hemisphere (e.g., arcuate fasciculus, superior longitudinal fasciculus)
- Commissural fibers: Connect corresponding areas across hemispheres via the corpus callosum
- Thalamocortical projections: Sensory inputs to Layer IV from the [thalamus[/brain-regions/[thalamus[/brain-regions/[thalamus[/brain-regions/[thalamus[/brain-regions/[thalamus--TEMP--/brain-regions)--FIX--
- Corticothalamic projections: Feedback from Layers V/VI
- Corticospinal projections: Motor commands from Layer V (upper [motor neurons[/cell-types/[motor-neurons[/cell-types/[motor-neurons[/cell-types/[motor-neurons[/cell-types/[motor-neurons--TEMP--/cell-types)--FIX--
- Corticostriatal projections: To [caudate nucleus[/cell-types/[caudate-nucleus[/cell-types/[caudate-nucleus[/cell-types/[caudate-nucleus[/cell-types/[caudate-nucleus--TEMP--/cell-types)--FIX-- and [putamen[/cell-types/[putamen[/cell-types/[putamen[/cell-types/[putamen[/cell-types/[putamen--TEMP--/cell-types)--FIX--; motor learning and habit formation
- Cortico-nigral projections: To [substantia nigra[/brain-regions/[substantia-nigra[/brain-regions/[substantia-nigra[/brain-regions/[substantia-nigra[/brain-regions/[substantia-nigra--TEMP--/brain-regions)--FIX--; motor regulation
- Cortico-hippocampal projections: Via entorhinal cortex to [hippocampus[/brain-regions/[hippocampus[/brain-regions/[hippocampus[/brain-regions/[hippocampus[/brain-regions/[hippocampus--TEMP--/brain-regions)--FIX--; memory consolidation
- Cortico-[amygdala[/brain-regions/[amygdala[/brain-regions/[amygdala[/brain-regions/[amygdala[/brain-regions/[amygdala--TEMP--/brain-regions)--FIX-- projections: Emotional processing and fear conditioning
The default mode network (DMN) is a set of cortical regions — medial [prefrontal cortex[/brain-regions/[prefrontal-cortex[/brain-regions/[prefrontal-cortex[/brain-regions/[prefrontal-cortex[/brain-regions/[prefrontal-cortex--TEMP--/brain-regions)--FIX--, posterior cingulate/precuneus, lateral temporal cortex, and medial temporal lobe — that
are active during rest and self-referential thought. The DMN is among the earliest networks disrupted in AD, and amyloid deposition preferentially accumulates in DMN hubs.[8]
The cortex receives blood supply from three major cerebral arteries:
- Anterior cerebral artery (ACA): Supplies medial frontal and parietal lobes
- Middle cerebral artery (MCA): Supplies lateral frontal, temporal, and parietal lobes (most common stroke territory)
- Posterior cerebral artery (PCA): Supplies occipital lobe and medial temporal structures
The cortex has rich collateral circulation through leptomeningeal anastomoses. Cortical [blood-brain barrier[/entities/[blood-brain-barrier[/entities/[blood-brain-barrier[/entities/[blood-brain-barrier[/entities/[blood-brain-barrier--TEMP--/entities)--FIX-- integrity is critical for neuronal health, and [BBB[/entities/[blood-brain-barrier[/entities/[blood-brain-barrier[/entities/[blood-brain-barrier[/entities/[blood-brain-barrier--TEMP--/entities)--FIX-- breakdown in
cortical regions has been observed early in AD pathogenesis.[9]
A hallmark of neurodegenerative diseases is that they do not affect the cortex uniformly — each disease targets specific cortical regions, layers, and cell types with remarkable
selectivity. Understanding these vulnerability patterns is a major focus of current research.[10]
[Alzheimer's disease[/diseases/[alzheimers[/diseases/[alzheimers[/diseases/[alzheimers[/diseases/[alzheimers--TEMP--/diseases)--FIX-- is the most common cause of cortical neurodegeneration:
- Earliest cortical changes: [Tau[/entities/[tau-protein[/entities/[tau-protein[/entities/[tau-protein[/entities/[tau-protein--TEMP--/entities)--FIX--(/proteins/tau neurofibrillary tangles (NFTs) appear first in the entorhinal cortex (Braak stages I–II), then spread to the [hippocampus[/brain-regions/[hippocampus[/brain-regions/[hippocampus[/brain-regions/[hippocampus[/brain-regions/[hippocampus--TEMP--/brain-regions)--FIX-- and limbic cortex (stages III–IV), and finally to association neocortex (stages V–VI)[4]
- [amyloid-beta[/entities/[amyloid-beta[/entities/[amyloid-beta[/entities/[amyloid-beta[/entities/[amyloid-beta--TEMP--/entities)--FIX-- plaques: Accumulate throughout the cortex, with early deposition in default mode network regions (precuneus, posterior cingulate, medial prefrontal)
- Layer vulnerability: NFTs preferentially affect layers II and III in entorhinal cortex and layers III and V in association cortex
- Synaptic loss: The strongest correlate of cognitive impairment in AD; synaptic density in frontal and temporal cortex correlates with MMSE scores[11]
- Cortical thinning: Progressive atrophy measurable on MRI, starting in medial temporal cortex and spreading to parietal and frontal association areas
- Selective sparing: Primary motor and visual cortices are relatively preserved until [late[/diseases/[late[/diseases/[late[/diseases/[late[/diseases/[late--TEMP--/diseases)--FIX-- stages
Frontotemporal Dementia encompasses several syndromes with distinct cortical atrophy patterns:
- Behavioral variant FTD (bvFTD): Prefrontal and anterior temporal cortex atrophy; personality changes, disinhibition, apathy. Pathology involves tau], [TDP-43[/entities/[tdp-43[/entities/[tdp-43[/entities/[tdp-43[/entities/[tdp-43--TEMP--/entities)--FIX--, or [FUS[/entities/[fus[/entities/[fus[/entities/[fus[/entities/[fus--TEMP--/entities)--FIX-- inclusions
- Semantic variant PPA: Anterior temporal cortex (especially left); loss of word and concept meaning
- Nonfluent/agrammatic PPA: Left posterior frontal and [insular cortex[/brain-regions/[insula[/brain-regions/[insula[/brain-regions/[insula[/brain-regions/[insula--TEMP--/brain-regions)--FIX--; effortful, halting speech
¶ ALS and Motor Cortex
Amyotrophic lateral sclerosis selectively destroys upper motor [neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons--TEMP--/entities)--FIX-- in layer V of the primary motor cortex:[3]
- Betz cells (giant pyramidal neurons) in layer V are among the most vulnerable [neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons--TEMP--/entities)--FIX--
- Motor cortex thinning is detectable on MRI and correlates with upper motor neuron signs
- [TDP-43[/entities/[tdp-43[/entities/[tdp-43[/entities/[tdp-43[/entities/[tdp-43--TEMP--/entities)--FIX-- inclusions in cortical motor [neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons--TEMP--/entities)--FIX-- are the hallmark pathology in ~97% of ALS cases
- ALS-FTD spectrum involves combined motor cortex and frontotemporal cortex degeneration
¶ Lewy Body Dementia
[Lewy body dementia[/diseases/[lewy-body-dementia[/diseases/[lewy-body-dementia[/diseases/[lewy-body-dementia[/diseases/[lewy-body-dementia--TEMP--/diseases)--FIX-- involves cortical [alpha-synuclein[/proteins/[alpha-synuclein[/proteins/[alpha-synuclein[/proteins/[alpha-synuclein[/proteins/[alpha-synuclein--TEMP--/proteins)--FIX-- pathology:
- Cortical Lewy bodies accumulate in limbic and then neocortical regions
- Fluctuating cognition and visual hallucinations correlate with cortical Lewy body burden
- Severe cholinergic deficits from loss of [nucleus basalis of Meynert[/brain-regions/[nucleus-basalis-of-meynert[/brain-regions/[nucleus-basalis-of-meynert[/brain-regions/[nucleus-basalis-of-meynert[/brain-regions/[nucleus-basalis-of-meynert--TEMP--/brain-regions)--FIX-- projections to cortex
- Occipitotemporal cortex dysfunction underlies the characteristic visual hallucinations
[Huntington's disease[/mechanisms/[huntington-pathway[/mechanisms/[huntington-pathway[/mechanisms/[huntington-pathway[/mechanisms/[huntington-pathway--TEMP--/mechanisms)--FIX-- causes progressive cortical thinning:
- Cortical atrophy involves frontal and parietal regions, in addition to the well-known striatal degeneration
- Layer V and VI pyramidal [neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons--TEMP--/entities)--FIX-- projecting to the [striatum[/brain-regions/[striatum[/brain-regions/[striatum[/brain-regions/[striatum[/brain-regions/[striatum--TEMP--/brain-regions)--FIX-- are selectively lost
- Cortical thinning correlates with cognitive decline and may precede motor symptom onset
- Mutant [huntingtin[/proteins/[huntingtin[/proteins/[huntingtin[/proteins/[huntingtin[/proteins/[huntingtin--TEMP--/proteins)--FIX-- protein] aggregates in cortical [neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons--TEMP--/entities)--FIX--
[Posterior cortical atrophy[/diseases/[posterior-cortical-atrophy[/diseases/[posterior-cortical-atrophy[/diseases/[posterior-cortical-atrophy[/diseases/[posterior-cortical-atrophy--TEMP--/diseases)--FIX-- predominantly affects parietal and occipital cortex:
- Progressive visuospatial dysfunction, simultanagnosia, and visual agnosia
- Most commonly associated with underlying AD pathology (atypical AD presentation)
- Cortical atrophy centered on dorsal visual stream regions
[corticobasal degeneration[/diseases/[corticobasal-degeneration[/diseases/[corticobasal-degeneration[/diseases/[corticobasal-degeneration[/diseases/[corticobasal-degeneration--TEMP--/diseases)--FIX--:
- Asymmetric cortical atrophy, typically affecting posterior frontal and parietal lobes
- Tau-positive astrocytic plaques and neuronal inclusions
- Ideomotor apraxia and cortical sensory loss
¶ Cortical Plasticity and Compensation
The cortex retains substantial plasticity throughout life:
- Synaptic plasticity: [Long-term potentiation[/entities/[long-term-potentiation[/entities/[long-term-potentiation[/entities/[long-term-potentiation[/entities/[long-term-potentiation--TEMP--/entities)--FIX-- and long-term depression underlie learning and memory
- Cortical reorganization: Following injury, adjacent cortical areas can partially assume functions of damaged regions
- Cognitive reserve: Education, bilingualism, and intellectual engagement are associated with greater cortical thickness and resilience to neurodegeneration[12]
- Exercise-induced [neuroplasticity[/mechanisms/[neuroplasticity[/mechanisms/[neuroplasticity[/mechanisms/[neuroplasticity[/mechanisms/[neuroplasticity--TEMP--/mechanisms)--FIX--: Aerobic exercise increases cortical thickness and improves cortical function in aging and early neurodegeneration
This section links to atlas resources relevant to this brain region.
Cortical development involves a stereotyped sequence of events:
- [Neurogenesis[/entities/[neurogenesis[/entities/[neurogenesis[/entities/[neurogenesis[/entities/[neurogenesis--TEMP--/entities)--FIX--: Production of [neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons--TEMP--/entities)--FIX-- in the ventricular and subventricular zones
- Neuronal migration: Radial migration along radial glial scaffolds to form cortical layers (inside-out pattern, with deeper layers born first)
- Synaptogenesis: Formation of synaptic connections (peaks in early childhood)
- Myelination: Continues into the third decade of life; association cortex myelinates last
- Synaptic pruning: Elimination of excess synapses during development and adolescence; regions of late myelination and late pruning may be more vulnerable to neurodegeneration
- Anti-amyloid [immunotherapy[/treatments/[immunotherapy[/treatments/[immunotherapy[/treatments/[immunotherapy[/treatments/[immunotherapy--TEMP--/treatments)--FIX--: [Lecanemab[/treatments/[lecanemab[/treatments/[lecanemab[/treatments/[lecanemab[/treatments/[lecanemab--TEMP--/treatments)--FIX-- and [donanemab[/treatments/[donanemab[/treatments/[donanemab[/treatments/[donanemab[/treatments/[donanemab--TEMP--/treatments)--FIX-- reduce cortical amyloid plaque burden
- Anti-tau therapies: Aim to prevent cortical tau spread; multiple antibodies in [clinical trials[/[clinical-trials[/[clinical-trials[/[clinical-trials[/[clinical-trials[/[clinical-trials[/[clinical-trials[/[clinical-trials[/clinical-trials
- [Cholinesterase inhibitors[/entities/[cholinesterase-inhibitors[/entities/[cholinesterase-inhibitors[/entities/[cholinesterase-inhibitors[/entities/[cholinesterase-inhibitors--TEMP--/entities)--FIX--: Partially compensate for cortical cholinergic deficits in AD and LBD
- Transcranial magnetic stimulation (TMS): Non-invasive cortical neuromodulation; under investigation for AD and FTD
- Deep brain stimulation: Modulates cortical-subcortical circuits
- Neurorehabilitation: Exploits cortical plasticity for functional recovery
- Gene therapy: Emerging approaches targeting cortical [neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons--TEMP--/entities)--FIX-- with AAV vectors for genetic forms of FTD and ALS
- [Brain Regions Index[/[brain-regions[/[brain-regions[/[brain-regions[/[brain-regions[/[brain-regions[/[brain-regions[/[brain-regions[/brain-regions
- [Neurodegenerative Diseases[/[diseases[/[diseases[/[diseases[/[diseases[/[diseases[/[diseases[/[diseases[/diseases
- [Mechanisms of Neurodegeneration[/[mechanisms[/[mechanisms[/[mechanisms[/[mechanisms[/[mechanisms[/[mechanisms[/[mechanisms[/mechanisms
The study of Cerebral Cortex has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
The cerebral cortex is the largest and most evolutionarily advanced structure in the human brain, underlying our cognitive abilities, language, and consciousness. Its extensive neocortical expansion and layered architecture enable sophisticated information processing, but these same features may contribute to its vulnerability in neurodegenerative diseases. Cortical atrophy is a hallmark of Alzheimer's disease, with particular involvement of the entorhinal cortex and [hippocampus[/brain-regions/[hippocampus[/brain-regions/[hippocampus[/brain-regions/[hippocampus[/brain-regions/[hippocampus--TEMP--/brain-regions)--FIX-- in early stages. In frontotemporal dementia, focal cortical degeneration produces characteristic patterns of behavioral and language impairment. Understanding cortical circuitry, connectivity, and the molecular basis of cortical neuron loss is essential for developing therapies that preserve cognitive function. Advances in cortical imaging, electrophysiology, and molecular profiling offer unprecedented opportunities to monitor disease progression and evaluate therapeutic interventions targeting cortical [neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons[/entities/[neurons--TEMP--/entities)--FIX-- and their supporting glial cells.
- [Herculano-Houzel S. The human brain in numbers: a linearly scaled-up primate brain. Front Hum Neurosci. 2009;3:31. [DOI]
- Kandel ER, Schwartz JH, Jessell TM, et al. Principles of Neural Science. 5th ed. McGraw-Hill; 2013.
- [Lemon RN. The human motor cortex microcircuit: insights for neurodegenerative disease. Nat Rev Neurosci. 2020;21(8):401-415. [DOI]
- [Braak H, Braak E. Neuropathological stageing of Alzheimer-related changes. Acta Neuropathol. 1991;82(4):239-259. [DOI]
- [Molyneaux BJ, Arlotta P, Menezes JR, Macklis JD. Neuronal subtype specification in the cerebral cortex. Nat Rev Neurosci. 2007;8(6):427-437. [DOI]
- [Hodge RD, Bakken TE, Miller JA, et al. Conserved cell types with divergent features in human versus mouse cortex. Nature. 2019;573(7772):61-68. [DOI]
- [Verret L, Mann EO, Bhatt DK, et al. Inhibitory interneuron deficit links altered network activity and cognitive dysfunction in Alzheimer model. Cell. 2012;149(3):708-721. [DOI]
- [Buckner RL, Snyder AZ, Shannon BJ, et al. Molecular, structural, and functional characterization of [Alzheimer's disease[/diseases/[alzheimers[/diseases/[alzheimers[/diseases/[alzheimers[/diseases/[alzheimers--TEMP--/diseases)--FIX--: evidence for a relationship between default activity, amyloid, and memory. J Neurosci. 2005;25(34):7709-7717. [DOI]
- [Sweeney MD, Sagare AP, Zlokovic BV. [Blood-Brain Barrier breakdown in Alzheimer's Disease and other neurodegenerative disorders. Nat Rev Neurol. 2018;14(3):133-150. [DOI]
- [Fu H, Hardy J, Bhatt P, Bhatt D. Molecular and cellular mechanisms of selective vulnerability in neurodegenerative diseases. Nat Rev Neurosci. 2024;25(5):351-371. [DOI]
- [Terry RD, Masliah E, Salmon DP, et al. Physical basis of cognitive alterations in [Alzheimer's disease[/diseases/[alzheimers[/diseases/[alzheimers[/diseases/[alzheimers[/diseases/[alzheimers--TEMP--/diseases)--FIX--: synapse loss is the major correlate of cognitive impairment. Ann Neurol. 1991;30(4):572-580. [DOI]
- [Stern Y. Cognitive reserve in ageing and [Alzheimer's disease[/diseases/[alzheimers[/diseases/[alzheimers[/diseases/[alzheimers[/diseases/[alzheimers--TEMP--/diseases)--FIX--. Lancet Neurol. 2012;11(11):1006-1012. [DOI)
-
-
-
-