Question:hard
What is the characteristic pattern seen in Brown-Sequard syndrome?
What is the characteristic pattern seen in Brown-Sequard syndrome?
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Spinothalamic crosses early, so pain and temperature loss is on the opposite side.
Updated On: Jun 23, 2026
- Contralateral loss of joint sense and position
- Contralateral loss of pain
- Ipsilateral loss of complete sensory functions
- Contralateral motor functions
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The Correct Option is B
Solution and Explanation
Step 1: Map the three long tracts and where they decussate, then apply a one-sided cord lesion. This is the cleanest way to predict Brown-Sequard findings. Step 2: Corticospinal fibres and the dorsal-column fibres for vibration and joint position have already crossed in the brainstem, so cutting one half of the cord drops motor power and proprioception on the SAME side as the lesion, below it. Step 3: Pain and temperature travel in the spinothalamic tract, which crosses just one or two segments after entering. A hemisection therefore abolishes pain and temperature on the OPPOSITE side, starting a few segments under the lesion level. Step 4: So the trademark contralateral sign is loss of pain sensation, matching option (b); the other choices misassign the side of proprioceptive or motor loss. \[\boxed{\text{Contralateral loss of pain}}\]
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