Premium
Estimation of cervical cord dysfunction by somatosensory evoked potentials
Author(s) -
Hayashida Tatsuro,
Ogura Taku,
Hase Hitoshi,
Osawa Toru,
Hirasawa Yasusuke
Publication year - 2000
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/1097-4598(200010)23:10<1589::aid-mus18>3.0.co;2-4
Subject(s) - somatosensory evoked potential , myelopathy , median nerve , medicine , spinal cord , dorsum , ulnar nerve , stimulation , cord , normal values , lesion , latency (audio) , anesthesia , surgery , anatomy , elbow , psychiatry , electrical engineering , engineering
The purpose of this study was to examine the relationship of abnormal short‐latency somatosensory evoked potentials (SSEPs) recorded by a noncephalic reference montage with clinical variables in cervical myelopathy patients and to reexamine the diagnostic utility of SSEPs in such patients. We studied cervical SSEPs elicited by stimulating the median and ulnar nerves in 87 patients. Our grade classification of spinal N13, which is based on the normal limits of latencies or amplitudes, corresponded well with the clinical variables and is of value when trying to localize the cervical lesion segmentally. The N9–P14 interpeak latency in response to ulnar nerve stimulation correlated well with lower extremity function ( r = −0.440, P <0.0001). We suggest a combined assessment of N13 amplitude, and N9–N13 and N9–P14 interpeak latencies to estimate dorsal column and dorsal horn function separately in patients with cervical myelopathy. © 2000 John Wiley & Sons, Inc. Muscle Nerve 23: 1589–1593, 2000