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Category:Primary motor cortex
Abbrev M1  +
CurationStatus uncurated  +
CytoDefiningCriteria Like all parts of the neocortex, the prima Like all parts of the neocortex, the primary motor cortex is made of six layers. Unlike primary sensory areas, primary motor cortex is agranular cortex; that is, it does not have a cell-packed granular layer (layer 4). Instead, the most distinctive layer of primary motor cortex is its descending output layer (Layer 5), which contains the giant Betz cells. These pyramidal cells and other projection neurons of the primary motor cortex make up ~30% of the fibers in the corticospinal tract. http://neuroscience.uth.tmc.edu/s3/chapter03.html neuroscience.uth.tmc.edu/s3/chapter03.html
DefiningCriteria cyto-architecture, connectivity  +
Definition The part of the cerebral cortex that recei The part of the cerebral cortex that receives projections from the motor thalamus and which projects to motor neurons in the brainstem and spinal cord. The motor cortex corresponds to Brodmann's area 4 (MM). The primary motor cortex, or M1, is located on the precentral gyrus and on the anterior paracentral lobule on the medial surface of the brain. Of the three motor cortex areas, stimulation of the primary motor cortex requires the least amount of electrical current to elicit a movement. http://neuroscience.uth.tmc.edu/s3/chapter03.html neuroscience.uth.tmc.edu/s3/chapter03.html
EfferentProjections Spinal cord ventral horn +, Thalamus +
Has default formThis property is a special property in this wiki. PONS brain region  +
Has role Motor system function +
Id nlx_143555  +
Is part of Motor cortex +, Frontal cortex +
Label Primary motor cortex  +
Modification dateThis property is a special property in this wiki. 1 September 2014 18:29:30  +
ModifiedDate 1 September 2014  +
Page has default formThis property is a special property in this wiki. PONS brain region  +
PartiallyOverlapsWith Brodmann 1909 area 4 human +, Precentral gyrus +, Area 4 of cortex primary motor of PHT00 +
Species Mammal +
SuperCategory Regional part of brain  +
Synonym primary motor area  +
TomoDefiningCriteria Located anterior to the central sulcus, in the pre-central gyrus in humans. The caudal border is sharp and apposed to primary somatosensory cortex in the depths of the central sulcus.
Xref Primary motor cortex +
Categories Regional part of brain
hide properties that link here 
Red nucleus + AfferentProjections
Primary motor cortex layer 1 +, Primary motor cortex layer 5 +, Primary motor cortex layer 6 + Is part of
Resource:Database on Brain Map Transformations in Cerebellar Systems + Keywords
Area 4 of cortex primary motor of PHT00 +, Brodmann 1909 area 4 human +, Lateral agranular field + PartiallyOverlapsWith
Primary motor cortex + Xref
 

 

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*Note: Neurolex imports many terms and their ids from existing community ontologies, e.g., the Gene Ontology. Neurolex, however, is a dynamic site and any content beyond the identifier should not be presumed to reflect the content or views of the source ontology. Users should consult with the authoritative source for each ontology for current information.