Motor Control 2 Flashcards
What is the cerebellum responsible for?
The co-ordination of voluntary movements
Define co-ordination
Control of the timing of sequences of contractions in different muscles to make a movement smooth and reliable
What makes up the outer part of the cerebellum?
A highy convoluted grey matter cerebellar cortex
What makes up the layer beneath the cerebellar cortex of grey matter?
White matter containing axons going to and from the cortex?
Where are the deep cerebellar nuclei?
Deep within the white matter of the cerebellum
What are the three functional areas of the cerebellum?
Archicerebellum (Vestibulocerebellum)
Paleocerebellum
Neocerebellum
What is the function of the archicerebellum?
Concerned with posture and balance, with major input form the vestibular system
What is the paleocerebellum?
More important in 4 legged animals, has control of gait in humans
What is the function of the neocerebellum?
Makes up 90% of cerebellum, responsible for unconscious co-ordianation of voluntary movements
Where does input to the cerebellum reach first?
All of it goes to the cortex/cerebellar hemisphere
Where does output come from in the cerebellum?
The dentate nucleus
Where does output from the dentate nucleus in the cerebellum go?
It is relayed but eh thalamus to the MC
How can information reach the cerebellar cortex?
In two ways. Firstly, a direct route via the pons of the brainstem
Or, an indirect route which traverses several brain areas and finally makes connections in the inferior olive nucleus in the brainstem
What is the name of the fibres running from the pons to the cerebellar cortex? (direct route)
Mossy fibres
What is the name of the fibres running from the inferior olive to the cerebellar cortex? (indirect route)
Climbing fibres