motor control and motor cortex Flashcards
primary motor cortex
pre central gyrus frontal lobe
upper motor neurons
executes command to motor neurons
stimulate elicits simple move of single joints
pre motor cortex
recives input from sensory areas
plans movements
spatial guidance of movement
suplementry motor cortex
sequencing of movement
feeds correct motor instruction into PMC
mental rehersal of coordinated movement
reflexes
involuntary raid movements initiated by eliciting stimulus
rythmic motor patterns
combines voluntary and reflexive actions
initiaiton is voluntary and termination as well
voluntary
complex action
purpose/ goal orientated
learnt, can be improved with practice
how voluntary movement occurs
1 plan- stratergy of action/ motor goals
2 program- produce orientated construction
3 execution- get commands to muscle
central pattern generators
neuronal circuts produce rythmic motor patterns in absense of sensory info
stepping pattern generator
adaptive networks of spinal interneurons that activate lower motor neurons
activated continuously
output adapted to task, environment
requires normal basal ganglia/ cerebellum control
motor control
ability to regulate/ direct mechanisim essential to our movements
proprioception
provides info about wb and limb position before movement
visual system:
provide info about visual ques
vestibular system
input from inner ear about head position in relation to gravity
hierachal model
organised control that is top down
higher level exert control over lower level
doesn’t explain dominance of reflex in certain situations e.g withdrawal
dynamic model
whole body- mechanical system subject to forces
degrees of freedom need to be controlled
movement has variability
decrease variability is bad
limit- nervous system has lesser role presumed
ecological
motor control evolved to cope with environment suggest action require preceprtual info specific to goal
decrease acknowledgment of structure and function
