The Korean Journal of Physiology
- 제28권2호
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- Pages.113-122
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- 1994
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- 0300-4015(pISSN)
Functional Characteristics of Lumbar Spinal Neurons Projecting to Midbrain Area in Rats
- Park, Sah-Hoon (Department of Physiology, Chonnam University Medical School) ;
- Kim, Geon (Department of Physiology, Chonnam University Medical School)
- 발행 : 1994.12.01
초록
The present study was carried out to characterize the functional properties of spinomesencephalic tract (SMT) neurons in the lumbar spinal cord of urethane anesthetized rats. Extracellular single unit recordings were made from neurons antidromically activated by stimulation of the midbrain area, including the deep layers of superior colliculus, periaqueductal gray and midbrain reticular formation. Recording sites were located in laminae I-VII of spinal cord segments of L2-L5. Receptive field properties and responses to calibrated mechanical stimulation were studied in 78 SMT cells. Mean conduction velocity of SMT neurons was