L16: Motor Cortices - B Flashcards
Which two structures are important for execution of a voluntary movement?
A. Sensory Cortices
B. PMC/SMA
C. Basal Ganglia
D. MI/Cerebellum
D. MI/Cerebellum
Motor commands are sent via the ____ pathways
A. ascending
B. descending
B. descending
Which three structures are important for programming any voluntary movement?
A. Sensory Cortices
B. PMC/SMA
C. Basal Ganglia
D. MI/Cerebellum
B. PMC/SMA
C. Basal Ganglia
Which of the following is its cell body and processes located entirely within the CNS?
A. UMN
B. LMN
A. UMN
Which of the following innervates s. muscle and has cell but in CNS, but axon in PNS?
A. UMN
B. LMN
B. LMN
True or False: The primary motor cortex is
topographically organized
True
Neurons in layer V of M-1, which give rise
to CST, are also known as…
Betz Cells
___ has lowest electrical threshold required for
movement
M-I
True or False: In the M-I, direction of movements is controlled by
population of neurons, not single UMN
True
___ stimulation elicits complex movements + coordinates movement of limbs at more than
one joint
PMC
True or False: SZA plays an important role in
planning of movements
False - PMC
___ ___ encodes
behavioral context
Premotor cortex (PMC)
Where were mirror neurons discovered?
PMC
True or False: Stimulation of PMC or SMA produces complex movements
True
