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American Zoologist 1972 12(3):513-519; doi:10.1093/icb/12.3.513
© 1972 by The Society for Integrative and Comparative Biology
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Studies on the Neurosecretory Control of Egg Laying in Aplysia

IRVING KUPFERMANN
Departments of Physiology and Psychiatry, New York University School ofMedicine, and Department of Neurobiology and Behavior, Public Health Research Institute of The City of New York New York, New York 10016

Studies are reviewed on the electrophysiological and endocrinological features of a group of neurosecretory cells (the big cells) in the abdominal ganglion of Aplysia. Electrophysiological studies suggest that the bag cells are involved in the regulation of a phasic behavioral function such as egg laying. Egg laying occurs approximately one hour following the injection into the hemocele of a crude extract of the bag cells or of the perfusate of an abdominal ganglion in which a pleural abdominal connective is electrically stimulated. The bag cells appear to act as a unit, releasing a measured dose of egg laying hormone when they are triggered into activity.


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