Abstract
The bottom traces of Fig. 4.1A show the specimen records from the posterior epidural space (PES) of the lumbar enlargement in response to median nerve stimulation at the wrist in a wakeful subject. Any potentials were hardly noticeable in the lumbar enlargement. Thus, peripheral nerve stimulation at a distal site in the upper extremity can hardly evoke any potential change in the caudal segments of the spinal cord in a normal human. This, however, does not mean that peripheral nerve stimulation at a distal site in the upper extremity can hardly evoke any potential change in the caudal segments of the upper extremity or has no influence on spinal function in the lumbar enlargement. It is rather more likely that the electrical activity does exist but is barely demonstrated due to the temporal and spatial dispersion of the potential when the distal site of a peripheral nerve is stimulated. Therefore, it is predicted that when a more rostral site on the peripheral nerve is stimulated, a potential deflection could be more clearly demonstrated in the lumbosacral enlargement in humans, similar to that observed in the rat (Shimoji et al., 1986a,b,c).
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Section B: Chapter 4
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Tomita, M., Shimoji, K. (2006). Heterosegmental SCPs (HSPs). In: Shimoji, K., Willis, W.D. (eds) Evoked Spinal Cord Potentials. Springer, Tokyo. https://doi.org/10.1007/4-431-30901-2_8
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