Role of cerebellum and basal ganglia in planning and fine control of movement Flashcards
Which 4 types of body orientation are controlled by the cerebellum, which overall allows fine control/coordination of movement?
Movement
Posture
Motor learning
Synergy
Define synergy of movement?
Rate/range/force/direction of movement
What are the 3 main divisions of the cerebellum?
Vestibulocerebellum
Spinocerebellum
Pontocerebellum
What is the other name for the vestibulocerebellum, and which 2 individual cerberllar structures make up the vestibulocerebellum division?
Flocculonodular lobe
Consists of nodule and flocculus
Define vestibular input, and how where are vestibular receptors located?
Sensation of any change in position, direction, or movement of the head
Vestibular receptors are located in inner ear
What are the 2 effects of the vestibulocerebellum, in terms of controlling movement?
Controls eye movement
Controls balance
In the vestiulocerebellum division, which ascending tract is vestibular input transmittted in by first-order sensory neurons from the inner ear vestibular receptors?
Vestibulocerebellar tract
In the vestibulocerebellum division, where in the brainstem do most first-order sensory neurons synpase with second-order neurons?
Medial or inferior vestibular nuclei, which are located in the brainstem
In the vestibulocerebellum division, how is vestibular input transmitted from the medial/inferior vestibular nuclei in the brainstem to the cerebellar cortex?
Vestibular input continues to ascend from vestibular nuclei, through inferior cerebellar peduncles into cerebellar cortex
In the vestibulocerebellum division, do all vestibular inputs ascend to the vestibular nuclei, during transmission to the cerebellar cortex?
No, some first-order neurons ascend directly through inferior cerebellar peduncle to cerebellar cortex
Which 2 individual cerebellar structures make up the spinocerebellum?
Vermis (unpaired, middle region of cerebellum that connects both hemispheres)
Intermediate hemispheres
Which 2 nuclei (cluster of neurons) are associated with the spinocerebellum?
Interposed nuclei
Fastigial nuclei
What are the 2 effects of spinocerebellum division, in terms of controlling movement?
Recieves spinal cord input to:
Control synergy of movement
Convey proprioceptive info (ability to sense movement, action, and locate body parts), touch, pressure
What are the 2 ascending tracts to the spinocerebellum division?
Posterior/dorsal spinocerebellar tract
Anterior/ventral spinocerebellar tract
Which spinal segmental levels detect spinal cord input that ascends through the posterior/dorsal spinocerebellar tract, and which body regions are supplied by the output?
Segments above L3 level
Trunk, lower limbs