Function of Giant Mauthner's Neurons in the Lungfish

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Science  27 Mar 1959:
Vol. 129, Issue 3352, pp. 841-842
DOI: 10.1126/science.129.3352.841


Unit spikes were recorded from the spinal cord of the lungfish Protopterus and were identified with Mauthner's axon. With these spikes occurred nongraded tail flips suggesting startle responses. The tail flip and the giant spike resulted from certain forms of jarring and prodding. The conduction velocity for the slightly myelinated. 45 µ diameter fibers was 18.5 m/sec.

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