Sensorimotor disorders Flashcards
bottom up movement
externally generated movement; elicited by external stimuli. i.e. reflexes; superior, inferior colliculi
top down movement
internally generated movement; making a decision and controlling it
spinal cord motor circuits
controls reflexes
brain stem motor nuclei
controls cranial nerves
secondary motor cortex
intentions and decision
association cortex
planning and developing motor plans
motor equivalence
we can do the same movement with different parts of our body (overlap in brain activity, esp. secondary motor cortex is same)
response chunking
with practice, different steps/aspects of an action become one sensorimotor program
shifting to lower levels
prefrontal cortex involved in learning a new task; with practice, we need less “brain” i.e. association cortex doesn’t need to be involved
posterior parietal cortex
part of association cortex. key region for guiding attention and proprioception.
stimulation of posterior parietal cortex
person gets the feeling they’re about to perform an action, intention building up.
damage to posterior parietal cortex
apraxia & contralateral neglect
apraxia
inability to perform movements
on command, imitate gestures, use novelty tools
dorsolateral prefrontal cortex
part of association cortex. receives information from external and internal world; earliest firing when there’s an intention toward movement
damage to dorsolateral prefrontal cortex
problems with decision-making, flexibility in behavior, motivation
