|
|
From NeuroLex
| 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.
|
7 May 2012 22:40:31 +
|
| ModifiedDate
|
7 May 2012 +
|
| 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.
|
| Categories |
Regional part of brain
|
|
|
