The role of anterior ganglia in phototaxis and thigmotaxis in the earthworm
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The role of the supra- and subpharyngeal (anterior) ganglia in thigmotaxic and phototaxic behavior in the earthworm (Lumbricus terrestris) was studied. In the first experiment, thigmotaxis reduced negative phototaxis for both worms whose anterior ganglia were removed and control worms. Therefore, the thigmotaxic effect appeared independent of the anterior ganglia. In the second experiment, the role of the anterior ganglia in the accuracy of escape from a directional light was studied. Earthworms with intact anterior ganglia did not escape the light significantly more accurately than earthworms without anterior ganglia.
KeywordsNeural Basis Escape Response Removal Group Incandescent Light Control Worm
- BULLOCK, T. H., & HORRIDGE, G. A. Structure and function, in the nervous systems of invertebrates. San Francisco: Freeman, 1965.Google Scholar
- DOOLITTLE, J. H. The effect of thigmotaxis on negative phototaxis in the earthworm. Psychonomic Science, 1971, 22, 311–312.Google Scholar
- JANZEN, R. Beitrage zur Nervenphysiologie der Oligochaeten. Zoologische Jahrbucher Abt Fuer Allegemeine Zoologie und Physiologie der Tiere, 1931, 50, 51–150.Google Scholar
- SMITH, A. C. The influence of temperature, odors, light and contact on movements of the earthworm. American Journal of Physiology, 1902, 6, 459–486.Google Scholar