Brown-Séquard syndrome following a right hemisection of the spinal cord at T6 produces which combination of neurological deficits?

• A Right spastic paraparesis + right loss of pain/temperature below T6 + left loss of proprioception below T6
• B Bilateral spastic paraparesis + bilateral loss of proprioception below T6
• C Right spastic paraparesis + left loss of pain/temperature below T6 + right loss of proprioception below T6 ✓
• D Right spastic paraparesis + bilateral loss of pain/temperature below T6

Explanation

In Brown-Séquard syndrome from right hemisection: (1) ipsilateral (right) UMN signs (corticospinal tract) below lesion; (2) ipsilateral (right) loss of proprioception/vibration (posterior column — uncrossed); (3) contralateral (left) loss of pain and temperature (lateral spinothalamic tract — crosses within 1–2 segments). This dissociated sensory loss with ipsilateral proprioception and contralateral pain/temperature loss is pathognomonic. Bilateral deficits suggest complete cord transection, not hemisection.

Reference: BD Chaurasia's Human Anatomy, 8th ed.

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Written and medically reviewed by the StethoPrep medical team.