Cerebellum Flashcards
What does the vermis separate?
The left and right hemeisphere
What fibres does the cerebellum contain?
Projection fibres
NOT commissural or association
What does the horizontal fissure separte?
Superior and inferior halves
What does the primary fissure separate?
The posterior and anterior lobe
Name the three cerebellar lobes
Posterior, anterior and flocculonodular
What will happen if the cerebellar tonsils are compressed?
Respiratory and cardiac failure if the intracranial pressure increases, thus death
Describe the blood supply to the cerebellum
- Supeior half (above horizontal fissure)
- Supeior cerebellar artery (basilar artery)
- Inferior half (below horizontal fissure)
- Anterior inferior cerebellar artery (basilar)
- Posterior inferior cerebellar artery (vertebral)
Describe the connections to:
Superior, inferior and middle cerebellar peduncle
- Superior: axons to and from the midbrain
- Middle: axons from the pons
- Inferior: axons to and from the medulla
Name the nuclei located in the cerebellum
- Fastigal
- Interposed
- globose
- emboliform
- Dentate
Name the layers of the cerebellar cortex
- Molecular
- Purkinje (GABA)
- Granule
What are the major functions of the cerebellum?
- Is a comparator
- Error detector
- Error correction
- Coordination of all body movements (lesion = ataxia)
Describe Ataxia
Spinocerebellar and vestibulocerebellar lesions
Cerebrocerebellar lesions
- Cerebellar lesion, thus causing lack of propriceptive information
- Paitent cannot percieve position or movement of leg and staggers
- To over come this paitent uses vision to compensate
Spinocerebellar and vestib lesions
- truncal ataxia
Cerebrocerbellar lesions
- limb ataxia
Describe the vestibulocerebellar pathway
Describe the spinocerebellar pathway
Describe the cerebrocerebellar loop
