This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'All are involved in Brown sequard syndrome except \nSelect and explain. \nA. Ipsilateral pyramidal tract, B. Contralateral dorsal column, C. Contralateral spinothalamic tract, D. Ipsilateral plantar extensor', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In Brown sequard syndrome, a hemisection of the spinal cord results in \n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Sensory\n\nLoss of Ipsilateral dorsal column sensations. \nLoss of contralateral lateral column sensations.\n\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Motor\n\nLoss of ipsilateral corticospinal action- results in UMNL- Extensor plantar response.', 'role': 'assistant'}]