What neurological sign is associated with an ipsilateral cerebellar lesion?

Ataxia is the correct answer because it is a hallmark symptom associated with ipsilateral cerebellar lesions. The cerebellum is responsible for coordinating voluntary movements, balance, and motor control. When a lesion occurs in one hemisphere of the cerebellum, it affects the same side of the body due to the pathways that cross over in the brainstem. This means that patients with cerebellar lesions will commonly present with ataxia, characterized by unsteady movements and difficulties with coordination.

In contrast, the other choices are associated with different types of neurological lesions. Contralateral hemiparesis typically results from lesions in the motor pathways of the contralateral hemisphere of the brain, not the cerebellum. Vocal changes may occur with lesions affecting neural structures involved in voice production or modulation, such as those in the brainstem or cortex, rather than localized cerebellar lesions. Visual field loss is often due to lesions affecting pathways in the occipital lobe or optic pathways, leading to deficits like homonymous hemianopsia, which is not directly linked to cerebellar function.