sentences:  It is named after physiologist Charles-Édouard Brown-Séquard, who first described the condition in 1850.Brown-Séquard syndrome may be caused by injury to the spinal cord resulting from a spinal cord tumour, trauma [such as a fall or injury from gunshot or puncture to the cervical or thoracic spine], ischemia (obstruction of a blood vessel), or infectious or inflammatory diseases such as tuberculosis, or multiple sclerosis.In its pure form, it is rarely seen.