Motor Cortex Flashcards
This area of the cortex for initiating saccades
frontal eye fields
Loss of function to one side of frontal eye fields leads to
loss of contralateral saccade movement
Why does the primary motor cortex neuron activate before movement?
preparation
What is the function of the dorsal premotor cortex?
reaching
More complicated movements come from which area of the brain?
premotor cortex
Feeding movements that have behavioral signifigance happens where?
premotor cortex
The loss of which brain area might result in not being able to respond to stimuli?
premotor cortex
Posterior parietal cortex has a lot to do with
vision
Supplementary motor area has to do with
internal generation of movement
Which area plans movements?
supplementary motor area
Which area is active in mental rehearsal?
supplementary motor areas
As tasks become highly proficient, activity in the supplementary motor area…
decreases
Patients become stimulus bound when you lesion which area?
supplementary motor area
Alien hand syndrome results from
lesion of supplementary motor cortex
What is utilization behavior?
use of objects in an inappropriate setting (excessive response to external stimuli) from supplementary motor cortex
These are specialized pyramidal cells found in the 5th layer of the motor cortex
Benz cells (Mercedes-Benz = motor)
The horizontal gaze center is located where?
PPRF
paramedian pontine reticular formation
PPRF projects to which nerves?
ipsilateral abducens
contralateral occulomotor –> medial rectus
PPRF fibers run through this area when they cross to the opposite eye
medial longitudinal fasciculus
Frontal eye fields project to the ipsilateral/contralateral side
contralateral
What happens when the right frontal eye fields are damaged on one side?
saccades are lost to the left side/eyes remain to the right
Homunculus areas control
body parts, not individual muscles
