The hand-to-nose or finger-to-nose test is used to assess what function?

• A. Cerebellar function
• B. Sensory pathways
• C. Cranial nerve II function
• D. Peripheral reflexes

Answer: (A)

The hand-to-nose and finger-to-nose tasks assess cerebellar coordination of voluntary movement. Successfully reaching and touching the nose with precision, then returning to the target, requires smooth planning, accurate timing, and proper coordination of muscles guided by the cerebellum. A normal result shows a quick, accurate, tremor-free movement. If the cerebellum isn’t functioning well, you’ll see dysmetria (overshooting or undershooting), intention tremor, or an uncoordinated approach, which indicates cerebellar dysfunction.

These tests aren’t about sensing touch or proprioception alone (sensory pathways), nor do they specifically evaluate vision via cranial nerve II or reflex pathways of the peripheral nervous system.