NDLI: Processing of sensory signals by a non-spiking neuron in the leech

Content Provider	Springer Nature Link
Author	Marín Burgin, A. Szczupak, L.
Copyright Year	2000
Abstract	The non-spiking neurons 151 are present as bilateral pairs in each midbody ganglion of the leech nervous system and they are electrically coupled to several motorneurons. Intracellular recordings were used to investigate how these neurons process input from the mechanosensory P neurons in isolated ganglia. Induction of spike trains (15 Hz) in single P cells evoked responses that combined depolarizing and hyperpolarizing phases in cells 151. The phasic depolarizations, transmitted through spiking interneurons, reversed at around –20 mV. The hyperpolarization had two components, both reversing at around –65 mV, and which were inhibited by strychnine (10 µmol l–1). The faster component was transmitted through spiking interneurons and the slower component through a direct P-151 interaction. Short trains (<400 ms) of P cell spikes (15 Hz) evoked the phasic depolarizations superimposed on the hyperpolarization, while long spike trains (>500 ms) produced a succession of depolarizations that masked the hyperpolarizing phase. The amplitude and duration of the hyperpolarization reached their maximum at the initial spikes in a train, while the depolarizations persisted throughout the duration of the stimulus train. Both phases of the response were relatively unaffected by the spike frequency (5–25 Hz). The non-spiking neurons 151 processed the sensory signals in the temporal rather than in the amplitude domain.
Starting Page	989
Ending Page	997
Page Count	9
File Format	PDF
ISSN	03407594
Journal	Journal of Comparative Physiology A
Volume Number	186
Issue Number	10
e-ISSN	14321351
Language	English
Publisher	Springer-Verlag
Publisher Date	2000-11-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Physiology Behavioral Neuroscience Animal Science and Zoology Ecology, Evolution, Behavior and Systematics

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