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논문 기본 정보

자료유형
학술저널
저자정보
Park, Sah-Hoon (Department of Physiology, Chonnam University Medical School) Park, Jong-Seong (Department of Physiology, Chonnam University Medical School) Jeong, Han-Seong (Department of Physiology, Chonnam University Medical School)
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대한생리학회 대한생리학회지 대한생리학회지 제30권 제2호
발행연도
1996.1
수록면
289 - 297 (9page)

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Excitatory amino acids (EAA) are thought to play an important role in producing cell death associated with ischemic and traumatic spinal cord injury. The present study was carried out to determine if the response characteristics of spinal sensory neurons in segments adjacent to degeneration sites induced by EAA are altered following these morphological changes. Intraspinal injections of quisqualic acid (QA) produced neuronal degeneration and spinal cavitation of gray matter. The severity of lesions was significantly attenuated by pretreatment with a non-NMDA antagonist NBQX. In extracellular single unit recordings, dorsal horn neurons in QA injected animal showed the increased mechanosensitivity, which included a shift to the left in the stimulus-response relationship, an increased background activity and an increase in the duration of after-discharge responses. Neuronal responses, especially the C-fiber response, to suprathreshold electrical stimulation of sciatic nerve also increased in most cases. These results suggest that altered functional states of neurons may be responsible for sensory abnormalities, e.g. allodynia and hyperalgesia, associated with syringomyolia and spinal cord injury.

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