![]() Neurophysiology in neurosurgery: a modern intraoperative approach, 1st ed. Intraoperative Neurophysiological Mapping of the Spinal Cord's Dorsal Columns. Contemporary management of adult intramedullary spinal tumors-pathology and neurological outcomes related to surgical resection. Dorsal column mapping via phase reversal method: the refined technique and clinical applications. Nair D, Kumaraswamy VM, Braver D, Kilbride RD, Borges LF, Simon MV. Utility of neurophysiological monitoring using dorsal column mapping in intramedullary spinal cord surgery. Yanni DS, Ulkatan S, Deletis V, Barrenechea IJ, Sen C, Perin NI. Spinal cord mapping as an adjunct for resection of intramedullary tumors: surgical technique with case illustrations. Quinones-Hinojosa A, Gulati M, Lyon R, Gupta N, Yingling C. Intraoperative neurophysiologic monitoring.Further study is needed to elucidate the role of this technique for prevention of dorsal column injury. Among them, phase-reversal technique is a fast and easy method which provide real-time feedback to identify the neurophysiologic midline of the spinal cord before myelotomy. They are: recording of somatosensory-evoked potentials (SEPs) on the exposed spinal cord with a miniature multielectrode, antidromic sensory nerve action potentials on the peripheral nerves, and phase-reversal SEPs on the scalp. So far, three methods of dorsal column mapping have been introduced. ![]() Dorsal column mapping is a technique to identify the left and right dorsal columns, and the neurophysiological midline of the spinal cord before myelotomy during intramedullary spinal cord tumor surgeries. Injury to the dorsal columns can result in dysfunction manifesting numbness, dysesthesias, proprioception changes, and sensory ataxia. Midline myelotomy to approach an intramedullary tumor may cause dorsal column injury.
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