Which instruction will the nurse offer the patient when performing the Romberg test?

Safe performance of the Romberg test requires the nurse to stand nearby to prevent falls due to orthostatic instability. The patient is instructed to minimize base of support by placing the feet together. Observing the degree of swaying helps the clinician determine if the balance deficit is visual, vestibular, or proprioceptive in origin. A. "Walk heel to toe across the room.": This instruction describes tandem gait testing, which evaluates cerebellar function and overall coordination during locomotion. While it tests balance, it is a dynamic assessment rather than the static postural assessment known as the Romberg test. It requires different neurological pathways for execution. B. “Run the heel of foot down the opposite shin.": This maneuver is the heel-to-shin test, used primarily to assess appendicular coordination and cerebellar integrity. It is performed while the patient is supine or sitting. It checks for dysmetria rather than the static equilibrium measured by standing with eyes closed. C. "Pronate and supinate the hands rapidly.": This instruction tests for dysdiadochokinesia, which is the inability to perform rapid alternating movements. It is a specific sign of cerebellar dysfunction. It does not involve standing balance or the integration of proprioceptive and visual cues required for the Romberg test. D. "Stand with your feet together with eyes closed.": This is the standard procedural instruction for the Romberg test. It removes visual input, forcing the brain to rely on vestibular and proprioceptive signals to maintain an upright posture. This specific position allows the nurse to observe for pathological swaying or loss of balance.