Cerebellum — Connections and Lesions

Two patients with cerebellar lesions are compared: Patient A has a lesion affecting the superior cerebellar peduncle (SCP), while Patient B has a lesion affecting the inferior cerebellar peduncle (ICP). Which clinical feature best distinguishes an SCP lesion from an ICP lesion?

Regarding cerebellar afferent connections, all of the following are TRUE except:

A 52-year-old man presents with acute-onset ataxia, nystagmus, and dysarthria following a brainstem stroke. Imaging confirms infarction of the superior cerebellar peduncle on the left. All of the following cerebellar efferent pathways are disrupted EXCEPT:

A 52-year-old man with a 6-month history of progressive gait ataxia and dysarthria undergoes MRI showing a lesion in the cerebellar hemisphere. On examination, he has intention tremor and dysdiadochokinesia on the ipsilateral side, but no vertigo or nystagmus. Which feature best distinguishes a cerebellar hemisphere lesion from a cerebellar vermis lesion?

A patient with a unilateral cerebellar hemisphere lesion presents with ipsilateral dysmetria and intention tremor. Which cerebellar output nucleus is most likely damaged?