motor system Flashcards
1
Q
both ___ and ___ give rise to descending projections
A
the precentral gyrus and
the premotor cortex .
2
Q
Why no strict somatotopy in the primary cortex
A
A single corticospinal axon may supply multiple columns of
LMN in the ventral horn
A single spike in a corticospinal axon may activate 4
different muscles in the forelimb.
3
Q
which area in the frontal lobe contains mirror cells?
A
lateral area contains
4
Q
Pyramidal pathways (2)
A
Corticospinal and corticobulbar tracts
5
Q
collaterals of corticospinal tracts _____ nucleus and _____
A
red; reticular formation
6
Q
Extrapyramidal pathways
A
Vestibulospinal and Reticulospinal tracts
