Final SG Flashcards
(42 cards)
motor pathways, hiearchal organization
spinal cord is lowest and gives contact between NS and muscles (reflexes), cortical regions are higest, cortex is higher and brainstem lower
motor cortex lateral or not?
lateral
cerebellum lateral or not?
not, is ipsilaterally
5 nuclei in basal ganglia
caudate nucleus, putamen, globus pallidus, subthalamic nucleus, substantia nigra
basal ganglia job
selection and initiation of actions
primary motor cortex is somatoropic representation
sides divided by importance where larger is more important, homunculus
hemiplegia
contralateral, loss of voluntary movememnt on contralateral side of body (opposite side of body affected by brain)
spinal cord
works like central pattern generator
physiological analysis of motor pathways
motor cortex is correlated with the direction of the target, differnt pathways are dorso dorso which does reaching for objects and ventro dorsal that does transitive, intransative, and apraxia
directional tuning
basic principle of motor cortex activities
population vector
predict direction of movement before movement is produced, sum of directional vectors
SMA
supplemental motor area, alien hand syndrome
mirror neurons
activation when observing other’s actions
basal ganglia as gatekeeper
important to initiation and selectivity of actions
huntington’s disease
hyperkinesia, execessive movement
parkinson’s
hypokinesia, loss of dopamine, substabtia nigra, cerelellum
learning
get info, memory, single exposure
modal model of memory
sensory memory to short term to ong term
working memory
limited capacity, central executive system
phonological loop
verbal and auditory information
hebbian earning
coopoperative whohc is increase stimulated, associativity which is nearby, and specificity which is only stimuated get stronger
james lange theory
emotionalr eaction depends on physical reactions
appraisal theory
automatic apprasal processes, step by step or unconscious
kluver bucy syndrome
lack of fear, amygdala damage
