Which symptom is a neurological sign of Decompression Sickness Type 2?

• A. Coughing
• B. Vertigo
• C. Loss of coordination
• D. Hearing loss

Answer: (C)

Decompression sickness Type 2 affects the nervous system, so signs reflect CNS and spinal cord involvement. Loss of coordination, or ataxia, points to cerebellar or other CNS dysfunction caused by gas emboli in the brain or spinal cord. This makes it a clear neurological sign of Type 2 DCS.

Coughing signals chest or pulmonary involvement, not the nervous system. Vertigo and hearing loss involve the inner ear’s vestibular and auditory structures; they are important symptoms of Type 2 but are not direct CNS signs like impaired coordination.