M1
E764618
M1 is the region of the brain’s frontal lobe responsible for executing voluntary movements by sending motor commands to the muscles.
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
brain region
ⓘ
cortical area ⓘ primary motor cortex ⓘ |
| alsoKnownAs |
Brodmann area 4
NERFINISHED
ⓘ
primary motor area NERFINISHED ⓘ |
| associatedWith |
corticobulbar tract
NERFINISHED
ⓘ
corticospinal tract NERFINISHED ⓘ |
| BrodmannAreaNumber | 4 ⓘ |
| cellType | pyramidal neurons ⓘ |
| contains |
Betz cells
NERFINISHED
ⓘ
upper motor neurons ⓘ |
| damageCauses |
contralateral paralysis
ⓘ
contralateral weakness ⓘ loss of fine motor control ⓘ |
| hasFunction |
control of contralateral body movements
ⓘ
execution of voluntary movements ⓘ fine motor control ⓘ force and direction coding of movements ⓘ sending motor commands to muscles ⓘ |
| hemisphereSpecificity | each hemisphere controls contralateral side of body ⓘ |
| involvedIn |
motor adaptation
ⓘ
motor learning ⓘ |
| locatedIn |
cerebral cortex
NERFINISHED
ⓘ
frontal lobe ⓘ precentral gyrus NERFINISHED ⓘ |
| locatedRelativeTo | anterior to central sulcus ⓘ |
| modulatedBy |
cerebellar-thalamic projections
ⓘ
dopaminergic input via basal ganglia circuits ⓘ |
| neurotransmitter | glutamate (excitatory output) ⓘ |
| organizedAs |
motor homunculus
ⓘ
somatotopic map ⓘ |
| partOf |
frontal lobe
ⓘ
motor system ⓘ neocortex ⓘ |
| presentIn | most mammals ⓘ |
| projectsTo |
brainstem motor nuclei
ⓘ
spinal cord ⓘ |
| receivesInputFrom |
basal ganglia
ⓘ
cerebellum ⓘ premotor cortex NERFINISHED ⓘ somatosensory cortex NERFINISHED ⓘ supplementary motor area NERFINISHED ⓘ |
| researchMethod |
electrophysiological recording
ⓘ
functional MRI ⓘ transcranial magnetic stimulation ⓘ |
| species | human ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.