Organization of the Cerebellum Flashcards
What are the functional divisions of the cerebellum? What are their functions
Vermis (fine motor coordination of proximal and trunk muscles), flocculonodular lobe (Same as Vermis), paravermal zone (fine motor coordination of distal appendicular muscles), lateral zone (Motor Planning)
What inputs/outputs are found in the superior cerebellar peduncle?
Inputs: Spinocerebellar tract
Outputs: to red nucleus and thalamus
What inputs/outputs are found in the middle cerebellar peduncle?
Inputs: Corticopontocerebellar fibers,
What inputs/outputs are found in the inferior cerebellar peduncle?
Inputs: posterior spinocerebellar tract (from dorsal nucleus of clarke [GTO’s and Muscle Spindles]), cuneocerebellar fibers (from accessory cuneate nucleus [GTO’s, Muscle Spindles]), Vestibulocerebellar fibers (from vestibular nuclei), olivocerebellar fibers (from inferior olive [information from red nucleus (originally from cortex)])
Pair the deep cerebellar nuclei with the functional zone of cerebellum that projects to them:
Vermis/Flocculonodular -> Fastigial nucleus (flocconodular direct to) -> Reticular Formation, Vestibular Nuclei
Paravermal -> Interposed (Emboliform, Globose) -> Red Nucleus/Ventrolateral Thalamus
Premotor, SI, association areas -> lateral nucleus -> Dentate -> M1
Where do vestibular inputs to the cerebellum terminate, give the general path:
Through inferior cerebellar peduncle to Floccolunodular lobe/Vermis, purkinje cells project to fastigial nucleus. Projects back to vestibular nuclei and reticular formation. (projects to spinal cord, [vestibulospinal, reticulospinal])
Where do the climbing fibers found in the molecular layer of cerebellar cortex originate?
Inferior Olive
Where do Mossy fibers found in the granular cell layer originate?
Spinal Cord, vestibular nuclei, basal pontine nuclei
What is the output cell of the cerebellar cortex?
Purkinje
