Abstract
The interesting Garfish olfactory nerve has been described by D. Easton (6). His structural analysis of the preparation shows homogeneous, uniform diametered axons measuring about 0.24 microns. The present study is an attempt to characterize its electrical and ionic property. The duration of the extracellularly measured action potential is about 60 msec at 20°C and increases to about 500 msec at 5°C, a time dispersion of about 8X. The conduction velocity varies from 20 cm/sec at 20°C to 4 cm/sec at 0°C. Recordings from small isolated fiber bundles have been shown to be viable. Reduction of sodium concentration to 5 mM in the external medium annihilates the A.P. response. Increase in external potassium concentration to about 16 mM makes the nerve inexcitable.
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