The finger-to-nose test assesses which neurological function?

• A. Cerebellar function
• B. Frontal lobe executive function
• C. Visual acuity
• D. Language centers

Answer: (A)

The finger-to-nose test checks how well the cerebellum coordinates ongoing movement and integrates proprioceptive input for precise, smooth motor control. When asking someone to touch the examiner’s finger and then their own nose, the expected result is accurate, fluid pointing with minimal overshoot. If the person consistently undershoots or overshoots (past-pointing) or shows tremor as they approach the target, it indicates cerebellar dysfunction affecting coordination and timing. This is not a measure of visual sharpness, language processing, or frontal-lobe planning—those functions involve other brain areas, whereas this task specifically probes upper-limb coordination and cerebellar control.