Question

The dorsal spinocerebellar and cuneocerebellar tracts enter the cerebellum via the inferior cerebellar peduncle. What may be the result of a lesion to the inferior cerebellar peduncle?

1) Ipsilateral ataxia and dysmetria
2) Contralateral ataxia and dysmetria
3) Bilateral ataxia and dysmetria
4) No effect on ataxia and dysmetria

Answer 1

A lesion to the inferior cerebellar peduncle can result in ipsilateral ataxia and dysmetria.

Step-by-step explanation:

A lesion to the inferior cerebellar peduncle can result in ipsilateral ataxia and dysmetria.

The dorsal spinocerebellar and cuneocerebellar tracts, which carry proprioceptive information from the body to the cerebellum, enter the cerebellum through the inferior cerebellar peduncle. A lesion to this peduncle disrupts the transmission of this sensory information, leading to impairments in motor coordination and accuracy on the same side of the body that the lesion is located. This is why the result of a lesion to the inferior cerebellar peduncle is ipsilateral ataxia and dysmetria.