Summary
Auditory neurons ascending to the supraesophageal ganglion from the ventral cord of the migratory locust,Locusta migratoria, were examined for alterations in the spike response during conduction in the axons. In each experiment the responses of a given neuron were recorded, with glass microcapillaries, in succession at different stations in the central nervous system. The responses were evaluated and compared by computer analysis.
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1.
The impulses in the auditory ventral-cord neurons pass unchanged along the main axon trunk, from the mesothoracic ganglion to the supraesophageal ganglion. Neither temporal pattern nor magnitude (impulses/stimulus) of the response is altered.
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The responses of neurons of a given type are the same on the left and right sides of an animal.
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3.
The head ganglia exert no influence upon the response or its conduction in the G, B and C neurons.
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4.
At the points where the axons branch, various time-dependent “filtering processes” can appear, which cause the activity conducted in the side branches to differ from that in the axon trunk.
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This work was done within the program of Sonderforschungsbereich 114 (Bionach) Bochum and supported by the Deutsche Forschungsgemeinschaft
We thank Prof. J. Schwartzkopff for his support. We are also grateful for technical help to Mrs. I. Klotz and Mrs. B. Brücher, and to H. Wittig, E. Müller, L. Schillak and H.J. Steingräber.
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Kalmring, K., Kühne, R. & Moysich, F. The auditory pathway in the ventral cord of the migratory locust (Locusta migratoria): Response transmission in the axons. J. Comp. Physiol. 126, 25–33 (1978). https://doi.org/10.1007/BF01342647
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DOI: https://doi.org/10.1007/BF01342647