Dysmetria is the clinical term for the inability to perform accurate point-to-point movements. During which test is this most commonly assessed?

• A. Finger-Nose-Finger / Finger-to-Nose test
• B. Gait
• C. DTRs
• D. CN

Answer: (A)

Dysmetria reflects a loss of precision in judging distance and movement amplitude, a sign of cerebellar dysfunction. The finger-nose-finger test is the most direct way to probe upper-limb coordination and accuracy in space. Have the patient alternately touch their nose and the examiner’s finger, then continue to the nose and back, repeating smoothly. In dysmetria, movements land short or overshoot the target (hypometria or hypermetria), and the trajectory may be irregular or tremulous. This task specifically challenges the coordination and proprioceptive control the cerebellum governs, making it the go-to maneuver for detecting dysmetria. Gait looks at overall balance and ataxia but isn’t the single best test for limb accuracy; reflexes (DTRs) assess the peripheral reflex arc; cranial nerve testing checks cranial nerve function rather than limb coordination.