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The role of polarization in electrical excitation of nerve

✍ Scribed by Schoepfle, Gordon M.

Publisher
Wiley (John Wiley & Sons)
Year
1943
Tongue
English
Weight
324 KB
Volume
22
Category
Article
ISSN
0095-9898

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✦ Synopsis

Temporal changes in excitability of nerve in response to brief currents indicate that a single time constant is sufficient in describing the phenomena mathematically (Lapique, '26 ; Blair, '32 ; Hill, '36 and Rushton, '37).

Bishop ('28) has indicated the manner in which the counter EMF of polarization might delay the rise of voltage across some particular nerve element until threshold is attained.

However, if polarization or reactance is involved it is conceivable that structures in the nerve other than the particular fiber in question might also be of significance.

Experiments were therefore designed to observe the shock artifact at the site of electrical stimulation.

Methods

A stimulus of the configuration shown in figure 2 (lower row) was employed in order to obviate the difficulty of very troublesome transients associated with rectangular currents. The device shown in figure 199

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