Term
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Definition
| the largest subdivision (in humans) of the cerebellar hemispheres |
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Term
| Where is the spinocerebellum located? |
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Definition
| just medial to the cerebrocerebellum |
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Term
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Definition
| the median strip of cerebellar hemisphere along the midline; primarily concerned with movements of proximal muscles; regulates certain types of eye nuclei in the brainstem & is primarily concerned with the vestibulo-ocular reflex & the regulation of movements that maintain posture and equilibrium |
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Term
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Definition
| three large pathways that connect the cerebellum & other parts of the nervous system |
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Term
| superior cerebellar peduncle/brachium conjunctivum |
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Definition
| axons project to the motor nuclei of the dorsal thalamus which in turn relay signals to circuits of upper motor neurons in the primary & premotor divisions of the motor cortex |
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Term
| middle cerebellar peduncle/brachium pontis |
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Definition
| an afferent pathway to the cerebellum; most of the cell bodies that give rise to this pathway are in the base of the contralateral pons |
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Term
| inferior cerebellar peduncle/restiform body |
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Definition
| contains multiple afferent & efferent pathways despite being the smallest peduncle; includes axons from the vestibular nuclei, the spinal cord, & several regions of the brainstem tegmentum |
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Term
| transverse pontine fibers |
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Definition
| the axons of the cells in the pontine nuclei; cross the midbrain & enter the cerebellum via the middle cerebral peduncle |
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Term
| The massive, crossed projection of transverse pontine fibers into the cerebellum via the middle cerebellar peduncle is the means by which signals originating in one _____ hemisphere are sent to neural circuits in the opposite _____ hemisphere |
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Definition
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Term
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Definition
| how proprioceptive signals from the face are relayed to the spinocerebellum; part of the trigeminal complex |
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Term
| The cerebrum is generally concerned with _____ representation |
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Definition
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Term
| The cerebellum is concerned with _____ representation |
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Definition
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Term
| inferior olivary nucleus/inferior olive |
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Definition
| where the entire cerebellum receives modulatory inputs from; in the brainstem; participates in the learning & memory functions served by cerebellar circuitry |
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Term
| decussation of the superior cerebellar peduncle |
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Definition
| where the dentate axons that exit the cerebellum via the superior cerebellar peduncle cross the midline; in the caudal midbrain; the axons cross here and then ascend to the contralateral thalamus |
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Term
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Definition
| where the dentate axons send collaterals along their course to the thalamus; in the midbrain |
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Term
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Definition
| movements tending to be decomposed into jerky & imprecise actions rather than smooth, well-coordinated, & multi-jointed movements as a result of cerebellar damage |
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Term
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Definition
| damage to the vestibulocerebellum causing the eyes to have difficulty maintaining fixation; they drift from the target & then jump back to it with a corrective saccade |
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Term
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Definition
| damage to the spinocerebellum causing difficulty performing rapid alternating movements |
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Term
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Definition
| damage to the spinocerebellum causing over- and underreaching |
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Term
| action tremors/intention tremors |
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Definition
| tremors that accompany over- and undershooting of a movement due to disruption of the mechanism for detecting & correcting movement errors |
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