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KMID : 0860920210230010020
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Journal of the Korean Association EMG-Electrodiagnostic Medicine
2021 Volume.23 No. 1 p.20 ~ p.23
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Bulbocavernosus Reflex and Pudendal Nerve Somatosensory Evoked Potential in a Cauda Equina Syndrome with Only Lower Sacral Nerve Root Symptoms
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Cho Yeon-Wook
Kim Tae-Hee
Choi Cheol
Park Ki-Deok
Lee Ju-Kang
Lim Oh-Kyung
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Abstract
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Cauda equina syndrome (CES) is a neurological condition involving low back pain, radiating pain, sensory loss, motor weakness, bladder dysfunction, and bowel dysfunction. A 37-year-old man was admitted with saddle-type hypesthesia, bladder dysfunction, and bowel dysfunction, but without motor weakness and radiating pain. He was diagnosed with large sequestrated lumbar disc herniation at L5-S1 and underwent decompression surgery. The initial bulbocavernosus reflex (BCR) and pudendal nerve somatosensory evoked potential (PSEP) on postoperative day 10 showed no response. After 1 month, bladder dysfunction and bowel dysfunction improved and saddle-type hypesthesia slightly improved. We also observed improvement in the BCR and PSEP during a follow-up evaluation on postoperative day 35. These results suggest that BCR and PSEP can indicate improvements in clinical symptoms and improved prognoses for CES patients with bladder dysfunction and bowel dysfunction.
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KEYWORD
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Cauda equina syndrome, Bulbocavernosus reflex, Evoked potentials, somatosensory
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