Voluntary Movement Flashcards
Where is volitional movement organized?
Cortex
High motor areas get to decide what?
Whether or not to respond AND what to do in the response
How many layers input info to the cortex?
4: I, II, III, IV
Where is the major output from the cortex?
Level V
What kind of movements are produced from M1?
Simple single joint movements
ex) elbow flexion
Why is redundancy good for activation of several muscles?
Still have some muscle activation after trauma or injury
What does M1 code for?
Force
Direction
ex) gripping coffee mug more or less; reaching in front
Where does PMCd project to?
Largely to proximal muscles
When does PMCd project?
Fires during delay between cue and actions
Where does PMCv project to?
Hand and digit muscles
When does PMCv project?
Hand to correct shape
Watching or performing tasks
Why is damage to the corona radiata very BAD?
It’s a small area where a lot of connections run through
So many fiber tracts travel through
Focal lesion leading to deficits to sensory input and motor output
If there is a focal lesion on corona radiata, what will the deficits be?
Sensory input and motor output deficits
Is the somatotopic organization of M1 permanent or plastic? Why?
Highly plastic
for motor learning + injury
Property of premotor areas (PMC and SMA)?
Plan movements
