Week 2 Flashcards
(21 cards)
corticospinal tract responsible for?
voluntary movement
Function of interneurons?
inhibits the antagonist (when one thing is activated)
LMN or UMN? hypoflexia
LMN
Other LMN symptoms?
weakness, fasciculations, hypotonia
Supplementary motor area responsible for?
action selection, learned movement
Anterior cingulate motor cortex responsible for?
behavioral motor control
If corticospinal tract is excitatory, what is the inhibitory counterpart?
cortico-reticulospinal trat
interruptions in corticospinal tract results in what symptoms?
negative symptoms-weakness, loss of dexterity, inability to increase force
Corticomedullary reticulospinal tract interruption results in…
hyperreflexia, spasticity
LMN cell bodies located
in anterior horn of spinal cord
corticospinal tract crosses where?
medulla pyramids
Execution of movement occurs where?
Precentral gyrus (M1)
visually guided reching and grasing occurs where?
premotor cortex
Motor learning and programming occurs where?
SMA (Supplementary motor area)
Motivation related motor drive occurs where?
anterior cingulate cortex
joins midbrain to cerebellum for output
superior cerebellar peduncle
joins medulla to cerebellum for input
inferior cerebellar peduncle
what does middle cerebllar peduncle join?
pons to cerebellum for input
describe the corticopontocerebellar pathway
1st order neuron from cerebral cortex
synpases with 2nd neuron in pontine nuclei
crosses midline to contralateral cerebellar hemisphere
Spinocerebellar pathway…describe it
cerebellum recieves input from ipsilateral spinal cord via ICP projecting from medulla
provides feedback for locomotion
pathway of deep cerebelli nuclei (dentate) as it travels from cerebellum to motor cortex
cerebellum, SCP, crosses midline synpases in ventral lateral nucleus in thalamus, motor/premotor cortex
