In Brown-Séquard syndrome affecting the right hemicord at C6, which combination of deficits is expected BELOW the lesion?

• A Right-sided UMN signs; bilateral loss of pain and temperature
• B Left-sided UMN signs + loss of fine touch; right-sided loss of pain and temperature
• C Bilateral loss of all modalities below C6
• D Right-sided UMN signs + ipsilateral loss of fine touch/proprioception; left-sided loss of pain and temperature ✓

Explanation

Right hemicord section causes: (1) ipsilateral (right) UMN paralysis — corticospinal tract has already crossed above, (2) ipsilateral (right) loss of fine touch/proprioception — posterior columns are uncrossed, (3) contralateral (left) loss of pain and temperature — spinothalamic tract has already crossed one to two segments above entry. This is the classic Brown-Séquard pattern.

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

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Written and medically reviewed by the StethoPrep medical team.