A patient suffers a stab wound at the level of C8-T1 on the left side of the spinal cord, transecting the left half. Which motor and sensory deficits are expected below the lesion?

• A Right UMN weakness, left proprioception loss, left pain-temperature loss
• B Left LMN weakness at lesion level only, bilateral pain-temperature loss below
• C Left UMN weakness, left proprioception loss, right pain-temperature loss ✓
• D Left UMN weakness, right proprioception loss, left pain-temperature loss

Explanation

Brown-Séquard syndrome results from hemisection of the spinal cord. Ipsilateral (left) corticospinal tract damage causes upper motor neuron weakness below the lesion. Ipsilateral posterior column (dorsal column) damage causes loss of proprioception, vibration, and discriminative touch on the left. Spinothalamic tract fibers decussate within 1-2 segments of entry, so contralateral (right) pain and temperature loss occurs below the lesion. This is a classic NEET PG pattern.

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

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.