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Physiological and morphological characterization of anaxonic non-spiking interneurons in the crayfish motor control system

1981; Elsevier BV; Volume: 226; Issue: 1-2 Linguagem: Inglês

10.1016/0006-8993(81)91104-5

1872-6240

Masakazu Takahata, Toshiki Nagayama, Mituhiko Hisada,

Physiological and biochemical adaptations

Spike activity of the motoneurons innervating uropod muscles in crayfish is controlled by anaxonic interneurons located within the terminal (the 6th abdominal) ganglion. These neurons do not generate spikes either spontaneously at the resting potential level or in response to current injection of either polarity. Yet the change in the membrane potential of these non-spiking interneurons caused an increase or decrease in the discharge frequency of motoneuron spikes, depending upon the direction of the membrane potential change. These non-spiking interneurons within the terminal ganglion presumably integrate various descending command signals and select the adequate information to be gated to the motoneurons.