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Neuro
Neuro Disorders/Lesions (Cerebellum & CN)
19
Medical
Graduate
10/24/2010

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Cards

Term
vestibulocerebellum (flocculonodular lobe of cerebellum) deep nuclei output
Definition
lateral vestibular nuclei
Term
spinocerebellum medial part (vermis of cerebellum) deep nuclei output
Definition
fastigial nucleus
Term
cerebrocerebellum (lateral part of cerebellum) deep nuclei output
Definition
dentate nucleus (largest)
Term
spinocerebellum lateral part (intermediate part of cerebellum) deep nuclei output
Definition
interposed (globose and embeliform) nuclei
Term
CN III Lesion (Oculomotor)
Definition
Eye deviates laterally and depressed, loss of ability to open eye (complete ptosis)
Term
CN IV Lesion (Trochlear)
Definition
Diplopia when eye adducted and depressed
Term
CN VI Lesion (Abducent)
Definition
loss of ability to deviate eye laterally, diplopia when abduction attempted
Term
(Cerebellar) Fastigial nucleus
Definition
nucleus involved with the vestibulocerebellum (archecerebellum),
and with coordination and balance of axial musculature. Lesion of this nucleus
or its efferent connections could result in bobbing of the head (titubation or
truncal ataxia).
Term
(Cerebellar) interposed nucleus (a combination of the globose and emboliform nuclei)
Definition
associated with the spinocerebellum. A lesion of this nucleus would lead to
cerebellar ataxia and a tendency to fall towards the side of lesion. Pendular
reflexes would be observed in the ipsilateral lower limb. A lesion of the
spinocerebellum is especially characteristic of acute alcohol intoxication and
chronic alcoholism.
Term
(Cerebellar) dentate nucleus
Definition
nucleus associated with the cerebrocerebellum (neocerebellum).
A lesion of this nucleus or its efferent connections would lead to dysdiadocho-
kinesia, past pointing, and an intention tremor, and decomposition of movement.
Term
Scissor Gait (where commonly seen, what lesions?)
Definition
abnormal gait commonly seen in spastic cerebral palsy. It is a
consequence of an upper motor neuron lesion
Term
vestibulocerebellum fx
Definition
Axial control and vestibular reflexes. Stability of eye movements
Term
spinocerebellum medial part
Definition
axial and proximal limb motor control, regulation of ongoing execution of movements
Term
spinocerebellum lateral part
Definition
distal motor control, regulation of ongoing execution of movements
Term
cerebrocerebellum fx
Definition
motor learning, initiation, planning, and timing (cognitive tasks like planning and timing)
Term
vestibulocerebellum (flocculonodular lobe of cerebellum) lesion
Definition
loss/reduction of postural stability, ataxic gait (improves on lying down), wide-based posture, nystagmus, eye movement difficulties (smooth pursuits,
voluntary eye movements)
Term
spinocerebellum medial part (vermis of cerebellum) lesion
Definition
ataxic gait (does NOT improve on lying down), titubation: truncal tremors during sitting or standing, truncal ataxia
Term
cerebrocerebellum lesion (lateral part of cerebellum)
Definition
dysdiadochokinesia, dysmetria, decomposition of movement
Term
spinocerebellum lateral part (intermediate part of cerebellum) lesion
Definition
action tremors, ataxia of limb movements
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