Mr X, 45 years is admitted with loss of balance while walking. A nurse performs the Romberg's sign to evaluat… - GMCH Nursing Officer-2025

GMCH Nursing Officer-2025

Medical & Surgical Nursing

Easy

Appeared in: GMCH Nursing Officer-2025

Explanation

The Romberg's test is specifically designed to evaluate proprioception, the body's ability to sense its position in space.
Proprioceptive information travels from the peripheral nerves up through the posterior (dorsal) columns of the spinal cord to the brain.
A positive Romberg's sign (loss of balance when eyes are closed) indicates a deficit in this pathway, pointing to a lesion in the posterior spinal column.
This condition is known as sensory ataxia, where balance is significantly worse without visual input.

Option A: Cerebellar dysfunction causes ataxia that is present whether the patient's eyes are open or closed. The cerebellum controls coordination, and its function is tested with tasks like the finger-to-nose or heel-to-shin tests.
Option B: The acoustic (vestibulocochlear) nerve (CN VIII) is involved in hearing and vestibular balance. While the vestibular system is crucial for balance, the Romberg test specifically isolates the proprioceptive system by removing vision. Tests for the acoustic nerve include hearing tests (Weber, Rinne) and specific vestibular function tests.
Option D: The facial nerve (CN VII) controls the muscles of facial expression and taste for the anterior two-thirds of the tongue. It has no role in posture or balance of the body.

Visual 1: Diagram: A cross-section of the spinal cord highlighting the posterior columns and the ascending proprioceptive pathway.
Visual 2: Flowchart: A simple flowchart illustrating the steps to perform the Romberg test and the interpretation of a positive vs. negative result.

Clinical Relevance

Nursing practice connection: Use the key finding related to Neurological assessment using Romberg's test for balance to guide bedside assessment, documentation, and the next nursing action.
Differentiating between sensory ataxia (posterior column issue) and cerebellar ataxia is critical for nurses as it points to different underlying pathologies and requires different management and safety precautions.
A patient with a positive Romberg's sign is at a high risk for falls, especially in low-light conditions. Nursing interventions must include fall prevention strategies like ensuring adequate lighting, removing hazards, and patient education.
What if the patient sways and loses balance with both eyes open and closed? This would suggest cerebellar ataxia, not a posterior column problem. The nurse's assessment would then focus on coordination tests, and the underlying cause would be investigated as a cerebellar lesion (e.g., stroke, tumor, degeneration).

How to Approach the Question

First, identify the key clinical test mentioned in the stem: 'Romberg's sign'.
Recall the purpose of the Romberg's test. It is designed to assess balance and, more specifically, proprioception.
Connect the physiological function (proprioception) to its corresponding anatomical pathway. Proprioceptive signals are carried by the posterior columns of the spinal cord.
Evaluate the given options. 'Posterior spinal column' directly matches the anatomical pathway for proprioception tested by Romberg's sign.
Eliminate the other options by recalling their primary functions: Cerebellum (coordination), Acoustic nerve (hearing/vestibular balance), and Facial nerve (facial muscles/taste).

Concept Tested & Keywords

Concept Tested: Neurological assessment using Romberg's test for balance.
Stem keywords: loss of balance, Romberg's sign
Lead-in keywords: evaluate the function of
Clinical cues: The patient's complaint of 'loss of balance while walking' prompts a neurological assessment to pinpoint the cause.

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