Neocortex

Neocortex
Name	Neocortex
Latin	cortex cerebri
System	Nervous system
Location	Cerebrum
Function	Higher-order brain functions

Neocortex

The neocortex is the outermost layer of the mammalian cerebral cortex involved in higher-order processing across perception, action, and cognition. It integrates inputs from subcortical structures and distributes outputs to motor, limbic, and associative targets, supporting functions examined by researchers at institutions such as Harvard University, Stanford University, Massachusetts Institute of Technology, University of Oxford, and Max Planck Society. Landmark studies by investigators at Johns Hopkins University, Columbia University, University of California, Berkeley, University College London, and Cold Spring Harbor Laboratory have shaped contemporary models appearing in reviews from Nature Neuroscience, Science, Cell, Neuron, and The Lancet.

Structure and cytoarchitecture

The layered organization of the neocortex exhibits six principal layers described in classic studies by Santiago Ramón y Cajal and refined by labs at Weill Cornell Medicine and Karolinska Institutet, with inputs and outputs mapped in atlases from Allen Institute for Brain Science and Human Connectome Project. Columnar microcircuits reported by researchers at University of Pennsylvania, Yale University, University of Cambridge, ETH Zurich, and University of Chicago reveal vertical modules receiving thalamic projections from nuclei characterized by groups at National Institutes of Health, Riken, and Max Planck Institute for Brain Research. Laminar distinctions between granular and agranular cortex are central to models developed by teams at Columbia University Medical Center, McGill University, University of Toronto, Seoul National University, and Peking University. Cytoarchitectonic maps by Brodmann continue to be referenced alongside modern imaging from Karolinska Centre for Neurodevelopmental Disorders, Imperial College London, Dartmouth College, and University of Michigan. Cellular diversity revealed by single-cell transcriptomics from Broad Institute, Salk Institute, University of California, San Diego, University of Pennsylvania Perelman School of Medicine, and Washington University in St. Louis distinguishes pyramidal neurons, interneuron classes described by researchers at Vanderbilt University, University of Texas Southwestern Medical Center, University of California, Los Angeles, Monash University, and University of Edinburgh.

Development and evolution

Neocortical development is orchestrated by signaling pathways studied at Howard Hughes Medical Institute, NIH, University of California, San Francisco, Princeton University, and Rockefeller University, with radial migration and neurogenesis processes traced in experiments from University of Cambridge and University of Oxford. Comparative studies by teams at Duke University, University of Chicago, Columbia University, Yale University, and Max Planck Institute for Evolutionary Anthropology contrast rodent and primate trajectories, while paleoneurology research referencing Charles Darwin and fossil analyses at Smithsonian Institution inform hypotheses about cortical expansion. Gene regulatory networks involving factors discovered through work at University of Geneva, Institut Pasteur, EMBL, Cold Spring Harbor Laboratory, and University of California, Irvine connect to human-specific elements investigated at Broad Institute, Wellcome Trust Sanger Institute, McDonnell Genome Institute, National Human Genome Research Institute, and European Molecular Biology Laboratory.

Function and neural circuitry

Functional specialization across neocortical areas—motor, premotor, prefrontal, parietal, temporal, and occipital regions—has been mapped by groups at Massachusetts General Hospital, Mayo Clinic, Karolinska Institutet, University College London Hospitals, and Hospital for Sick Children. Circuit motifs involving feedforward and feedback pathways have been formalized in theories from Yale University, Stanford Neurosciences Institute, MIT McGovern Institute, Cold Spring Harbor Laboratory, and Salk Institute. Long-range connectivity studies from the Human Connectome Project, European Human Brain Project, Allen Brain Atlas, NIH BRAIN Initiative, and Brain Research through Advancing Innovative Neurotechnologies reveal networks linking neocortex with thalamus and hippocampus described in publications by Johns Hopkins University School of Medicine, University of California, San Diego School of Medicine, Columbia University Vagelos College of Physicians and Surgeons, University of Pennsylvania Perelman School of Medicine, and Mayo Clinic Alix School of Medicine. Computational models developed at DeepMind, OpenAI, IBM Research, Google Brain, and Facebook AI Research draw inspiration from cortical circuitry examined by labs at University of Cambridge Department of Zoology, Princeton Neuroscience Institute, Rutgers University, and University of Wisconsin–Madison.

Sensory processing and cognition

Neocortical areas mediate sensory hierarchies characterized in visual, auditory, and somatosensory systems investigated by teams at California Institute of Technology, University of California, Irvine, University of Minnesota, University of Copenhagen, and University of Melbourne. Classic experimental paradigms from Wernicke and Broca have evolved through neuroimaging work at Massachusetts General Hospital Martinos Center, Stanford Center for Cognitive and Neurobiological Imaging, King's College London, Karolinska Institutet Department of Neuroscience, and Imperial College London Faculty of Medicine. Higher cognitive functions such as language, decision-making, working memory, and social cognition are focal points of research at National Institute of Mental Health, Wellcome Centre for Human Neuroimaging, Max Planck Institute for Human Cognitive and Brain Sciences, University of Pennsylvania Wharton School, and London School of Economics where findings link neocortical computation to behavior studied in experiments by Daniel Kahneman, Amos Tversky, Noam Chomsky, Steven Pinker, and Elizabeth Spelke.

Plasticity and learning

Synaptic plasticity mechanisms including long-term potentiation and depression were first characterized in labs at University of California, San Diego, University College London, University of Aberdeen, University of Basel, and University of California, Los Angeles. Experience-dependent rewiring described by investigators at University of California, Berkeley, Stanford University School of Medicine, Yale School of Medicine, Columbia University Medical Center, and Harvard Medical School underpins skill acquisition paradigms from Pavlov to contemporary training studies at Max Planck Institute for Biological Cybernetics and Karolinska Institutet. Rehabilitation research and neuromodulation trials conducted at Mayo Clinic, Johns Hopkins Medicine, Cleveland Clinic, Sheffield Teaching Hospitals, and University of Sydney apply plasticity principles to recovery after injury, stroke, and Parkinson's disease interventions pioneered at University of Toronto and University College London Hospitals.

Clinical significance and disorders

Disorders implicating neocortical dysfunction include epilepsy centers at Massachusetts General Hospital, Cleveland Clinic, Rothwell Hospital, Toronto Western Hospital, and Kansai Medical University; schizophrenia research at National Institute of Mental Health, Institute of Psychiatry, Psychology and Neuroscience, Karolinska Institutet, Columbia University, and King's College London; autism studies at UC Davis MIND Institute, Seattle Children's Research Institute, University of Cambridge Department of Psychiatry, Harvard Medical School, and University of Pennsylvania Perelman School of Medicine. Neurodegenerative conditions such as Alzheimer's disease and frontotemporal dementia are investigated by teams at University College London Dementia Research Centre, Alzheimer's Association, Mayo Clinic Alzheimer's Disease Research Center, Rush University Medical Center, and Cambridge Centre for Brain Repair. Traumatic injuries and cortical stroke outcomes are managed in programs at Johns Hopkins Hospital, Mount Sinai Health System, Karolinska University Hospital, Royal Melbourne Hospital, and Addenbrooke's Hospital. Diagnostic and therapeutic approaches from functional imaging and neurosurgery have been advanced by Royal College of Surgeons, American Association of Neurological Surgeons, International League Against Epilepsy, World Health Organization, and European Neurological Society.

Category:Neuroscience