Rinsho Seikei Geka Volume 38, Issue 3 (March 2003)

The Current Perception Threshold in Lumbar Disc Herniation Kunihito Kanaya 1 , Toshihiko Yamashita 1 , Satoshi Kawaguchi 1 , Tsuneo Takebayashi 1 , Genichiro Katahira 2 1Department of Orthopaedic Surgery,Sapporo Medical University 2Sapporo Kiyato Orthopaedic Hospital Keyword: current perception threshold(電流知覚閾値) , MRI(核磁気共鳴画像診断) , lumbar disc herniation(腰椎椎間板ヘルニア) pp.301-305
Published Date 2003/3/1
DOI https://doi.org/10.11477/mf.1408100658
  • Abstract
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Sensory disturbances in the legs of patients with lumbar disc herniation were quantitatively analyzed with a Neurometer(R).Fifty-five patients with radiculopathy secondary to lumbar disc herniation of the L4/5 or L5/S1 disc were examined,and 11 healthy volunteers served as controls.The L5 dermatome and the S1 dermatome of both legs were tested in all patients and controls.CPT values at 2,000Hz and 250Hz were significantly higher in the affected leg in the patient group than in the contralateral leg and in the controls.These results indicated predominant impairment of the function of A-beta and A-delta sensory fibers in patients with radiculopathy caused by lumbar disc herniation.CPT values in the affected leg were higher when the nerve root compression on the MR images was severer,but there were no significant differences between CPT values at any frequency.The results of this study suggested that CPT testing may be useful for predicting the severity of the nerve root compression and sensory nerve dysfunction in patients with lumbar radiculopathy.

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38巻3号 (2003年3月)
電子版ISSN 1882-1286 印刷版ISSN 0557-0433 医学書院