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CEREBEL.MCQ
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1993-08-06
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D:Created 14.44 06/08/1993
D:Subject : Physiology
D:Topic : Cerebellum
D:Level : Moderate
D:
D:Authors : Department of Physiology
D: The University
D: Leeds LS2 9NQ
I:MCQ SB 1
G:3
G:1:Dental Students
Q:1,2,3,4,5
G:2:Medical Students
Q:1,2,3,4,5
G:3:Science Students
Q:1,2,3,4,5
T:A
L:2
#:1
G: 10464 1 2 3
S:1
:A lesion of cerebellum may cause:
B:N:5
B:1:F:1
:loss of vibration sense
B:2:T:1
:ataxia
B:3:T:1
:intention tremor
B:4:F:1
:loss of proprioceptive sensation
B:5:T:1
:nystagmus
F:5
:The sensations of vibration and joint position depend on afferent
:information travelling in the dorsal column-medial lemniscal system to
:the primary sensory cortex. Lesions of the cerebellum do not usually
:give rise to sensory disturbances; instead ataxia (difficulty in walking)
:or intention tremor are the common signs of cerebellar lesions.
E:------
#:2
G: 10464 1 2 3
S:1
:Consider the efferent connections of the cerebellum:
B:N:5
B:1:T:1
:the rubrospinal tract receives a direct input from the cerebellum
B:2:F:2
:the medullary reticulospinal tracts receive an input from the
:cerebellum
B:3:T:1
:the lateral vestibulospinal tracts receive an input from cerebellum
B:4:T:1
:lesions of the cerebellar vermis cause disturbances of balance
B:5:F:1
:the cerebellum is not involved in the control of rapid movements
F:8
:The main efferent projections of the deep cerebellar nuclei (the
:dentate, interpositus and fastigial nuclei) are to the thalamus, red
:nucleus (and rubrospinal tract) and the vestibular nuclei. The oldest
:parts of the cerebellum (the flocculomodular lobe) have connections
:mainly with the vestibular nuclei. The cerebellum is concerned with the
:execution of coordinated movements, and lesions give rise to intention
:termor and to inability to perform rapid alternating movements
:(dysdiadokokinesis).
E:------
#:3
G: 10464 1 2 3
S:1
:The signs of a cerebellar lesion include:
B:N:5
B:1:T:1
:hypotonia
B:2:T:1
:intention tremor
B:3:T:1
:staccato (scanning) speech
B:4:T:1
:nystagmus
B:5:F:1
:Charcot's triad which is a combination of 1, 2 and 3 above
F:2
:Charcot's triad consists of intention tremor, nystagmus and scanning
:speech
E:------
#:4
G: 10464 1 2 3
S:1
:The main descending tracts from the cerebellum are:
B:N:5
B:1:T:1
:the rubrospinal tracts
B:2:F:1
:the reticulospinal tracts
B:3:T:1
:the lateral vestibulospinal tracts
B:4:T:1
:lesions of the vermis of the cerebellum affect balance
B:5:F:1
:the cerebellum is not involved in the control of rapid movements
F:1
:No explanation available
E:------
#:5
G: 10464 1 2 3
S:1
:The cerebellar cortex
B:N:5
B:1:T:1
:contains parallel fibres that arise from granule cells
B:2:T:1
:receives inputs from the contralateral inferior olive
B:3:T:1
:contains somatotopic maps of the body
B:4:F:1
:is made up of seven layers
B:5:T:1
:has outputs only via the Purkinje cell axons
F:9
:The mossy fibres and climbing fibres are the two main types of fibre
:providing input to the cerebellar cortex. The origin of these inputs is
:from the vestibular apparatus (flocculonodular lobe), the
:spinocerebellar tracts, and pons and inferior olive. Collaterals of
:these fibres synapse in the deep cerebellar nuclei and in the cerebellar
:cortex. The parallel fibres in the cortex arise from granule cells, and
:give synapses on
:the dendrites of the Purkinje cells, the only efferent neurone in the
:cerebellar cortex.
E:------
::