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Vasopressin and Oxytocin Excite Distinct Neuronal Populations in the Central Amygdala
Daniel Huber,1Pierre Veinante,2Ron Stoop1*
Vasopressin and oxytocin strongly modulate autonomic fear responses,through mechanisms that are still unclear. We describe how theseneuropeptides excite distinct neuronal populations in the centralamygdala, which provides the major output of the amygdaloidcomplex to the autonomic nervous system. We identified thesetwo neuronal populations as part of an inhibitory network, throughwhich vasopressin and oxytocin modulate the integration of excitatoryinformation from the basolateral amygdala and cerebral cortexin opposite manners. Through this network, the expression andendogenous activation of vasopressin and oxytocin receptorsmay regulate the autonomic expression of fear.
1 Department of Cellular Biology and Morphology and Centre for Psychiatric Neuroscience, Department of Psychiatry, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Switzerland. 2 Neurophysiologie Cellulaire et Intégrée, Unité Mixte de Recherche 7519, CNRS, Université Louis Pasteur, Strasbourg, France.
* To whom correspondence should be addressed. E-mail: rstoop{at}unil.ch
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