Which of the following is an arousal stimulus used in coma assessment?

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Multiple Choice

Which of the following is an arousal stimulus used in coma assessment?

Explanation:
Arousal in coma is assessed by applying a noxious stimulus to provoke wakefulness and observe any motor, verbal, or eye-opening response. Nailbed pressure serves as a classic, reliable arousal stimulus because it is a strong, ethical noxious input that can reveal the patient’s ability to wake and respond. Gag reflex is a brainstem reflex that shows cranial nerve integrity but does not measure wakefulness. Pupillary response reflects midbrain and autonomic function, not arousal. The Romberg test evaluates balance and proprioception, not consciousness. Thus, nailbed pressure is the most appropriate arousal stimulus in coma assessment.

Arousal in coma is assessed by applying a noxious stimulus to provoke wakefulness and observe any motor, verbal, or eye-opening response. Nailbed pressure serves as a classic, reliable arousal stimulus because it is a strong, ethical noxious input that can reveal the patient’s ability to wake and respond. Gag reflex is a brainstem reflex that shows cranial nerve integrity but does not measure wakefulness. Pupillary response reflects midbrain and autonomic function, not arousal. The Romberg test evaluates balance and proprioception, not consciousness. Thus, nailbed pressure is the most appropriate arousal stimulus in coma assessment.

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