corticospinal tract
E764619
central nervous system pathway
corticospinal tract subdivision
descending motor pathway
white matter tract
The corticospinal tract is a major descending motor pathway that carries voluntary movement commands from the cerebral cortex to motor neurons in the spinal cord.
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
central nervous system pathway
ⓘ
corticospinal tract subdivision ⓘ descending motor pathway ⓘ white matter tract ⓘ |
| bloodSupplyRelatedTo |
anterior cerebral artery
NERFINISHED
ⓘ
anterior spinal artery NERFINISHED ⓘ middle cerebral artery NERFINISHED ⓘ vertebral arteries ⓘ |
| carries | voluntary motor commands ⓘ |
| cellBodiesLocatedIn |
Betz cells of primary motor cortex
ⓘ
layer V of cerebral cortex ⓘ |
| clinicalSignOfLesion |
Babinski sign
NERFINISHED
ⓘ
hyperreflexia ⓘ spastic paralysis ⓘ weakness of voluntary movement ⓘ |
| composedOf | upper motor neuron axons ⓘ |
| decussatesAt |
pyramidal decussation in caudal medulla
ⓘ
pyramidal decussation in caudal medulla ⓘ segmental level in spinal cord ⓘ |
| function |
control of voluntary movement
ⓘ
fine motor control of distal limbs ⓘ skilled movements of hands and fingers ⓘ |
| hasPart |
anterior corticospinal tract
ⓘ
lateral corticospinal tract NERFINISHED ⓘ |
| hasSynonym | pyramidal tract NERFINISHED ⓘ |
| locatedIn |
anterior funiculus of spinal cord
ⓘ
cerebral cortex ⓘ lateral funiculus of spinal cord ⓘ |
| mostlyCrossed | true ⓘ |
| neurotransmitter | glutamate ⓘ |
| originatesIn |
premotor cortex
NERFINISHED
ⓘ
primary motor cortex NERFINISHED ⓘ somatosensory cortex NERFINISHED ⓘ supplementary motor area NERFINISHED ⓘ |
| partOf | pyramidal system ⓘ |
| passesThrough |
basis pontis
ⓘ
cerebral peduncle of midbrain ⓘ corona radiata ⓘ medullary pyramids NERFINISHED ⓘ posterior limb of internal capsule ⓘ |
| percentageFibersCrossed | approximately 80–90 percent ⓘ |
| percentageFibersUncrossed | approximately 10–20 percent ⓘ |
| projectsTo | spinal cord ⓘ |
| species | human ⓘ |
| targets |
alpha motor neurons
ⓘ
spinal interneurons ⓘ |
| terminatesIn |
spinal cord gray matter
ⓘ
ventral horn of spinal cord ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.