L14 Nervous System Motor Systems 1 _ 2
Objectives
- Identify major components of basal ganglia and the main circuit through the basal ganglia
- Describe the likely functions of the basal ganglia circuits
- Summarise the signs pathology and main treatment modes of parkinsons and huntingtons diseases
- identify major parts of cerebellum and the mahot circuit nomponents of the cerebellar cortex
- describe in general terms the likely functions of the cerebellum
- Summarise the main signs seen with cerebellar damage
Basal Ganglia
He talks about the function of the basal ganglia as self regulating element for the PMC which relays signals back to the PMC to undertake an action or not.
motor functions
- it helps the motor cortex select what movements to undertake and which to keep. it does this by either signalling the internal globus pallidus or the external globus pallidus
- it helps regulate initiation, scaling and sequencing
- abnormal functioning leads to parkinsons or huntingtons.
Cognitive/psychological functions includes
- helps prefrontal cortex to organise thoughts
- helps limbic system to organise emotions
- reward mediated learning, and attentions
- abnormal functioning leads to
- drug addiction
- adhd
- psychosis
- plus what was already mentioned in parkinsons and huntingtons
Cerebellum
the structure of the cerebeullum suggests it as a caluclation machine, where it has 2 inputs and 1 output
it likelt calculates prediction and what is liekly to happen next
it helps plan movement, correction and motor learning
disorders of the cerebellum include atacia intention tremor dysmetric nystagmus and titubation.