Abstract
It was established during experiments on pedal ganglia generating locomotor rhythm isolated fromClione limacina, a pteropod mollusk, that this rhythm was irregular in 30% of preparations; i.e., the locomotor generator worked in bursts which alternated with periods of regular activity. Locomotor bursts were produced by excitation in command neurons located within the pedal ganglia. Single neurons were extracted from the ganglia in these preparations generating locomotor bursts by means of an intracellular microelectrode; their somata were then placed in their original sites amongst the ganglia cells. A total of 35 neurons were isolated showing changed activity during bursts. Nine of these cells renewed their erratic activity (linked to locomotor bursts) following reinsertion into the ganglion. Neurons which had initially shown an excitatory pattern during bursts continued to be excited; the same was true for inhibitory types. These observations indicate that the command neurons governing generator operation can act on target cells when morphological contact with them has been suppressed.
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Institute for Research into Information Transmission, Academy of Sciences of the USSR, Moscow; M. V. Lomonosov State University. Moscow. Translated from Neirofiziologiya, Vol. 18, No. 6, pp. 756–763, November–December, 1986.
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Arshavskii, Y.I., Gel'fand, I.M., Delyagina, T.G. et al. Influence of the pteropod mollusk pedal ganglia locomoter system on anatomically isolated neurons. Neurophysiology 18, 528–533 (1986). https://doi.org/10.1007/BF01057792
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DOI: https://doi.org/10.1007/BF01057792