Sensorimotor system Flashcards
(19 cards)
what is the sensorimotor system
a part of the nervous system that is responsible for combining sensory input with motor output
what are the 3 principles of the sensorimotor system
hierarchically organised
sensory input
learning
what do the higher levels of the sensorimotor system do
plan and predict movement
what do the lower levels of the sensorimotor system do
execute the planned movements
what is the main role of the sensory system in the sensorimotor system
to fine tune the body movements
who found from their patient G.O that motor function was good but sensory function was impaired eg bottle
Rothwell, 1982
what are the 3 parts of the sensorimotor hierarchy in order
sensorimotor association cortex - posterior parietal association cortex & dorsolateral prefrontal association cortex
secondary motor cortex
primary motor cortex
what does the posterior parietal association cortex do
builds a spatial map of the body to help guide movement planning
what does the dorsolateral prefrontal association cortex do
assesses the sensory input from the PPAC and picks the right motor response
what does the secondary motor cortex do
gathers the information from the DPAC and plans the movement and coordination of the movement
what is the secondary motor cortex splits into
supplementary motor area
premotor area
cingulate motor area
what does the primary motor cortex do
gathers the movement from the SMC and sends it off to the muscles for fine tuning before execution
what are 2 feedback systems involved in the sensorimotor hierarchy
basal ganglia - involved in motor control and habit learning
cerebellum - coordinates movement precision, balance, and automatic movement
what does the basal ganglia consist of
dorsal striatum - claudate nucleus and putamen
globus pallidus
who found that neuronal activity in the basal ganglia is dependent on behaviour
Turner, 2005
what is cerebellar ataxia
poor balance and inaccurate movement
who found that dysmetria, a type of cerebellar ataxia, causes slower reaching movements
Day, 1998
what are 2 disorders of movement
Parkinsons - dopamine loss in the striatum
Huntingtons - variation of the HTT gene
who can you include if you forget names
Pinel 2017
