sethigulshan
Forum Senior
Topics: 27
Posts: 146
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Why are cerebellar lesions ipsilateral?
Why are basal ganglia lesions contralateral. I mean the stroke only, not the neurdegenerative ds like Parkinsons or huntingtons chorea which are bilateral.
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| KEROCHI
Forum Guru
Topics: 60
Posts: 971
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A unilateral lesion of the cerebellum may result in deficits in skeletal muscle performance IPSILATERAL to the side of the lesion( eg, the right side of the cerebellum projects to UMN cell bodies on the left, but the AXONS of UMN (corticospinal) cross & influence LMN on the right.
A pt. may fall toward the side of the lesioned cerebellum.
A unilateral lesion of the basal ganglia may result in deficits in skeletal muscle performance that are CONTRALATERAL to the side of the lesion (eg, the right basal ganglia project to UMN cell bodies on the right, but the AXONS of UMN (corticospinal) cross & influence the LMN on the left.
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| mildus
Forum Guru
Topics: 19
Posts: 614
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That's it.
Cerebellospinal tracts are uncrossed (or double crossed which is the same as uncrossed) so the right side of cerebellum gets afferent information from the same (right) side of body. So when right side of cerebellum is damaged, a man falls toward the right side.
And right side of cerebellum gets information from left side of cortex.
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| ssrpk
Forum Fanatic
Topics: 154
Posts: 2,819
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just a spin off!
how about it's connection with the vestibular system?
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