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Journal of Experimental Biology, Vol 197, Issue 1 79-99, Copyright © 1994 by Company of Biologists
JOURNAL ARTICLES |
P Hermann, A Maat and R Jansen
Behavioural and neurophysiological techniques were used to study the neuronal control of shell turning during egg-laying in the pond snail Lymnaea stagnalis. Egg-laying consists of three phases: resting, turning and oviposition, and is triggered by an electrical discharge in a group of neuroendocrine cells, the caudodorsal cells. During the discharge, several peptides encoded on two CDCH genes are known to be released. Behavioural experiments in which different combinations of nerves were lesioned indicated that the inferior cervical nerves are necessary for turning behaviour to occur. The right inferior cervical nerve innervates the right dorsal longitudinal muscle and contains axons of neurones that are active just prior to, and during, shell movements in freely behaving animals. These axons are probably the axons of motor neurones. The motor neurones of the dorsal longitudinal muscle were identified in the cerebral A and pedal N clusters. We have demonstrated that there is a correlation between the state of excitability of the caudodorsal cells and the electrical activity of the pedal N motor neurones. Our results indicate that the pedal N motor neurones are involved in executing the turning phase during egg-laying.
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P. A.C.M. De Boer, A. T. Maat, A. W. Pieneman, R. P. Croll, M. Kurokawa, and R. F. Jansen Functional Role of Peptidergic Anterior Lobe Neurons in Male Sexual Behavior of the Snail Lymnaea stagnalis J Neurophysiol, December 1, 1997; 78(6): 2823 - 2833. [Abstract] [Full Text] [PDF]
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P. M. Hermann, R. P. J. de Lange, A. W. Pieneman, A. ter Maat, and R. F. Jansen Role of Neuropeptides Encoded on CDCH-1 Gene in the Organization of Egg-Laying Behavior in the Pond Snail, Lymnaea stagnalis J Neurophysiol, December 1, 1997; 78(6): 2859 - 2869. [Abstract] [Full Text] [PDF]
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R. F. Jansen, A. W. Pieneman, and A. ter Maat Behavior-Dependent Activities of a Central Pattern Generator in Freely Behaving Lymnaea stagnalis J Neurophysiol, December 1, 1997; 78(6): 3415 - 3427. [Abstract] [Full Text] [PDF]
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