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Aplysia ink release: central locus for selective sensitivity to long-duration stimuli
- Source :
- Journal of Neurophysiology. 42:1223-1232
- Publication Year :
- 1979
- Publisher :
- American Physiological Society, 1979.
-
Abstract
- 1. A behavioral and electrophysiological analysis of defensive ink release in Aplysia californica was performed to examine the response of this behavior and its underlying neural circuit to various-duration noxious stimuli. 2. Three separate behavioral protocols were employed using electrical shocks to the head as noxious stimuli to elicit ink release. Ink release was found to be selectively responsive to longer duration stimuli, and to increase in a steeply graded fashion as duration is increased. 3. Intracellular stimulation of ink motor neurons revealed that ink release is a linear function of motor neuron spike train duration, indicating that the selective sensitivity of the behavior to long-duration stimuli is not due to a nonlinearity in the glandular secretory process. 4. In contrast, electrophysiological examination of ink motor neuron activity in response to sustained head shock revealed an accelerating spike train. During the later part of the spike train, compound excitatory synaptic potentials show a positive shift in reversal potential. 5. Our results suggest a central locus for the mechanisms that determine sensitivity of inking behavior to stimulus duration. 6. In contrast to ink release, defensive gill withdrawal was found to be extremely sensitive to short-duration stimuli.
- Subjects :
- Gills
Time Factors
Physiology
Locus (genetics)
Membrane Potentials
Exocrine Glands
Physical Stimulation
Aplysia
Reflex
Animals
Humans
Short duration
Motor Neurons
Electroshock
biology
Chemistry
General Neuroscience
biology.organism_classification
Aggression
Electrophysiology
body regions
Synapses
Neuroscience
Agonistic Behavior
circulatory and respiratory physiology
Subjects
Details
- ISSN :
- 15221598 and 00223077
- Volume :
- 42
- Database :
- OpenAIRE
- Journal :
- Journal of Neurophysiology
- Accession number :
- edsair.doi.dedup.....d4d5ee43270b1d155eea272d38717c63