A hemisection of the spinal cord at T8 on the right produces which combination of deficits below the lesion?
- A Right loss of proprioception and vibration; left loss of pain and temperature ✓
- B Right loss of all modalities; left spared
- C Left loss of proprioception; right loss of pain and temperature
- D Bilateral loss of pain and temperature with preserved proprioception
Correct answer: A. Right loss of proprioception and vibration; left loss of pain and temperature
Explanation
Brown-Séquard syndrome from a right-sided hemisection spares the contralateral side for proprioception and vibration (dorsal column fibers ascend ipsilaterally before decussating in the medulla), but interrupts the right corticospinal tract (ipsilateral UMN paralysis) and the already-decussated spinothalamic fibers (contralateral pain/temperature loss). This selective pattern is the hallmark of cord hemisection.
Reference: BD Chaurasia's Human Anatomy, 8th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.