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KMID : 1001920120510050286
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Journal of Korean Neurosurgical Society
2012 Volume.51 No. 5 p.286 ~ p.291
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Changes in Dermatomal Somatosensory Evoked Potentials according to Stimulation Intensity and Severity of Carpal Tunnel Syndrome
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Sohn Soo-Youn
Seo Jeong-Hwan
Min Yong
Seo Min-Ho
Eun Jong-Pil
Song Kyung-Jin
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Abstract
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Objective: To investigate the change of latency of cervical dermatomal somatosensory evoked potential (DSEP) according to stimulation intensity (SI) and severity of carpal tunnel syndrome (CTS).
Methods: Stimulation sites were the C6, C7, and C8 dermatomal areas. Two stimulation intensities 1.5×sensory threshold (ST) and 2.5×ST were used on both normal and CTS patients.
Results: In moderate CTS, the latencies of C6 and C7 DSEP during 1.5×ST SI and those of C7 DSEP during 2.5×ST SI were significantly delayed compared with the values of normal subjects. Significant correlation between the latency of C7 DSEP of 2.5×ST stimulation and the median sensory nerve conduction velocity was observed.
Conclusion: We suggest that these data can aid in the diagnosis of cervical sensory radiculopathy using low stimulation intensity and of those who have cervical sensory radiculopathy combined with CTS patients.
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KEYWORD
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Carpal tunnel syndrome, Dermatomal somatosensory evoked potential, Stimulation intensity, Stimulation threshold, Sensory radiculopathy
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