<prompt> The following are components of Brown Sequard syndrom, EXCEPT:Ipsilateral extensor plantar responseIpsilateral pyramidal tract involvementContralateral spinothalamic tract involvementContralateral posterior column involvement  <response>: Brown Sequard syndrome is associated with ipsilateral loss of joint position and vibratory sense posterior column involvement, ipsilateral weakness coicospinal tract involvement, contralateral loss of pain and temperature sense spinothalamic tract involvement one or two levels below the lesion, spastic leg with brisk reflexes and extensor plantar response. Ref: Harrisons Principles of Internal Medicine, 16th Edition, Page 2440 2441; Differential Diagnosis in Neurology and Neurosurgery: A Clinicians Pocket Guide, S. A. Tsementzis, Page 206. 