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The Neurobiology of an Insect Brain$
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Malcolm Burrows

Print publication date: 1996

Print ISBN-13: 9780198523444

Published to Oxford Scholarship Online: March 2012

DOI: 10.1093/acprof:oso/9780198523444.001.0001

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Actions of neuromodulators Actions of neuromodulators

Actions of neuromodulators Actions of neuromodulators

(p.229) 6 Actions of neuromodulators
The Neurobiology of an Insect Brain

Malcolm Burrows

Oxford University Press

The vast number of substances identified as potential neuromodulators means that any assessment of their actions will be complex. What role do the neurons containing these substances play in the expression of behaviour? Are these substances released locally at specific sites in the central and peripheral nervous system? Is their release more widespread so that they will affect many neurons at the same time, assuming, that is, that the neurons have the appropriate receptors? Can we predict the likely effect of a particular substance when it is present in a cocktail of many others? Clues to the answers of at least some of these questions can be gained by restricting attention to a few modulatory substances and to the actions of particular neurons that contain these substances. Much of the following description thus relates to the action of the efferent DUM neurons and the effects of octopamine.

Keywords:   neuromodulators, peripheral nervous system, central nervous system, efferent DUM neurons, octopamine, modulatory substances

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