exam 2 (98-107)
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17 terms
Terms | Definitions |
|---|---|
 restiform body | cerebellum is attached to the? 1. M.O. by inferior cerebellar peduncles(afferents dominate, eff still present). 2 pons via middle cerebellar peduncle(afferents only). 3. midbrain via superior cerebellar peduncle(efferents dominate, afferents present) |
| median vermis | connection of the hemispheres of the cerebellum |
| vestibulocerebellum | lobes:flocculonodular. inputs vestibular nucleus. funct: posture, equilibrum, balance |
| spinocerebellum | lobes:anterior, vermis, medial posterior. functions:muscle tone, trunk and limb movements |
| cerebrocerebellum | lobes:lateral posterior, imputs cortico-pontocerebellar (middle peduncle) funct:planning and coordination of skilled movement |
| white mater | (corpus medullare) continuous with 6 peduncles. made of afferent projection fibers, efferent projection fibers, commissural fibers (r to L connecting), association fibers within cerebellum. |
| arbor vitae | extensions of white matter toward periphery appear as a branching tree called? |
| gray mater | made of fissures, sulci, folia. most common neuron cell types: pukinje, golgi II, granular, basket,stellate. aranged into 3 laminae: 1. outer-molecular layer, 2. middle-purkinje cell body layer, 3.inner-granular layer. 2 types of input: climbing and mossy. purkinje fibers only fibers taking messages away from the cerebellar cortex |
| aspartate | climbing fibers(less numerous of the 2) synaps with smooth branches in molecular layer using? originate in the inferior olivary nucleus. |
| glutamate | mossy fibers(very numerous) synaps with granular cells, which synapse with spined dendritic braches of purkinje cells. using what transmitter? (spinocerebellar or corticopontocerebellar) |
| purkinje cell layer | middle cortical lamina. some smooth branches some spined. myelinated purkinje axons are the only efferent fibers from the cerebellar cortex. terminate in deep central cerebellar nuclei some bypass and end in deiters' portiong of vestibular nucleus. INHIBITORY (GABA) only efferent fibers from cerebellum |
| central cerebellar nuclei | (4 in each hemisphere, so 8 total) 1.dentate-largest and most lateral2.emboliform.3golbose. 4fastigial-most primitive and medial |
| vestibulocerebellum | exits inferior cerebellar peduncles to terminate in the vestibular nucleus and nuclei for cranial nerves III, IV and VI |
| spinocerebellum | go to fastigial nuclei |
| cerebrocerebellum | go to dentate nucleus |
| globose | axons extend out to red nucleus and reticular formations via superior cerebellar peduncles |
| dentate | (and emboliform) axons generally reach red nucleus and thalamus (via superior cerebellar peduncles) |
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