Cerebellum lecture Flashcards
How many neurons are chillin inside?
about half of the neurons present in the brain reside in the cerebellum
How many hemispheres does the cerebellum have and what are they separated by?
cerebellum consists of 2 hemispheres, separated by a midline vermis.
the anterior lobe is separated from the posterior lobe (largest lobe) by?
the primary fissure
posterior lobe is separated from the flocculo-nodular lobe by?
the posterolateral fissure
How is the cerebellum is attached to the brainstem?
at pons by 3 different cerebellar peduncles (inferior; middle; superior)
What are the cerebellar peduncles?
axonal pathways carrying information into and out of the cerebellum
3 functional divisions of the cerebellum
VESTIBULOCEREBELLUM, SPINOCEREBELLUM, CEREBROCEREBELLUM.
VESTIBULOCEREBELLUM
comprised largely of flocculo-nodular lobe; organized somatotopically
SPINOCEREBELLUM
comprised largely of the cerebellar vermis and intermediate part of both hemispheres
somatotopically organized.
CEREBROCEREBELLUM
consists of the lateral cerebellar hemispheres
what do lesions of the vestibulocerebellum produce?
- Problems in gait (staggering and a tendency to fall on the side that is damaged).
- Vertigo (sensation of spinning)
- Nystagmus (problems with eye movements due to inappropriate feedback);
what do lesions of the spinocerebellum produce?
- problems in reaching (sinuous reach)
- problems with alternating movements (dysdiadochokinesia)
Dura
the tough outermost membrane enveloping the brain and spinal cord.
