Movement- CNS control

Question 1

upath of upper motor neurons to brain

Answer 1

corticospinal tract, cross over to other side at the pyramidal decussation which is where the medulla and spinal cord meet

Question 2

preferred direction

Answer 2

primary motor cortex neurons prefer one direction. for that direction they have the most amount of AP firing. broadly tuned: neuron responds to a broader range of stimuli or commands (not just their max response stimulus or command)

Question 3

population coding

Answer 3

occurs in the primary motor cortex, the representation of info by activity distributed over a large number of neurons (one with biggest response moves most. others around it are slightly less active, etc.)

Question 4

parts of brain used to plan motor movements

Answer 4

prefrontal cortex, SMA, PMA, primary motor cotex, posterior parietal cortex

Question 5

prefrontal cortex

Answer 5

long-term, complex, big picture planning

Question 6

SMA and PMA

Answer 6

supplementary motor area and primary motor area, responsible for thinking about/ anticipating/ planning movements, low level planning

Question 7

posterior parietal cortex

Answer 7

connected with prefrontal cortex, carries infor about somatosensation (body position) and navigation (body location)