Program & Abstract Book - EPFL Latsis Symposium 2009

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EPFL Latsis Symposium 2009: Understanding Violence P-50 104 February 11-13 2009 op p o s i t e v a s o p r e s s i n r e l e a s e p a t t e r n s within t h e b e D n u c l e u s s t r i a terminalis a n D t h e l a t e r a l s e p t u m D u r i n g t h e D i s p l a y o f i n t e r m a l e a g g r e s s i o n Veenema, Alexa 1 ; Beiderbeck, Daniela 1 ; Neumann, Inga 1 1 Department of Behavioral Neuroendocrinology, Institute of Zoology, University of Regensburg, Regensburg, Germany Vasopressin (AVP) has been implicated in intermale aggression, but little is known about AVP neurotransmission during the display of intermale aggression. We used intracerebral microdialysis to monitor the in vivo secretory activity of AVP neurons within the bed nucleus of the stria terminalis (BST) and the lateral septum of adult male Wistar rats exposed as residents to the 10-min resident-intruder test. A significant increase in AVP release within the BST was found in non-aggressive rats compared with aggressive rats and compared with basal AVP release. The behavioral specificity of AVP release patterns was confirmed as both non-aggressive and aggressive rats showed a similar increase in AVP release when exposed to 10-min of forced swimming. Administration of the AVP V1a receptor antagonist d(CH2)5Tyr(Me)AVP into the BST of non-aggressive rats did not increase the level of aggression. However, application of synthetic AVP into the BST of aggressive rats significantly reduced the level of aggression. In contrast to the BST, AVP release within the septum was significantly increased in aggressive rats compared with non-aggressive rats and compared with basal AVP release. Pharmacological manipulation of the septal AVP system by local application of either synthetic AVP to nonaggressive rats or the specific V1a receptor antagonist to aggressive rats did not change the level of aggression. Taken together, we are the first to show that the display of intermale aggression is associated with distinct AVP release patterns within the BST and septum. Our data further indicate that AVP release within the BST directly affects the display of aggression, whereas AVP release within the lateral septum may rather be the consequence of the display of aggression and may have delayed effects on aggression-related behaviors, like anxiety and social memory. This work was supported by the Bayerische Forschungsstiftung (AHV) and the Deutsche Forschungsstiftung (IDN).
EPFL Latsis Symposium 2009: Understanding Violence P-51 ag g r e s s i v e r e s p o n s e s t o t r o u b l e D s i t u a t i o n s in s a m p l e o f a D o l e s c e n t s: Vigil-Colet, A 1 ; Lorenzo-Seva, U 1 ; Morales-Vives, F 1 1 Universitat Rovira i Virgili, Research Center for Behavioral As- sessment. Poster Abstracts We developed a questionnaire for measuring aggressive behaviors taking into account different situations where these behaviors are executed. The questionnaire consisted of six situations (three related to unknown people and three related to relatives) and seven possible behaviours (supposedly related to physical and verbal aggression and to anger) which was administered to 350 adolescents . The corresponding person x situation x response data was analysed using a three-mode component analysis. Furthermore 127 participants completed also the Buss &Perry (1992) aggression questionnaire and the Dysfunctional Scale of Dickman’s Impulsivity Inventory (Dickman, 1991). The amount of variance explained by the persons x situations x responses interaction justified the three-mode component approach. Results showed the expected two latent dimensions for situations (unknown people and relatives) and three latent dimensions for responses (physical aggression, verbal aggression and anger). In addition we founded five latent dimensions for persons that reflected five different profiles which reflected the existence of interactions between the response components and the situations. When the scores on the five components where related to AQ and impulsivity, results indicated that traditional questionnaires such as them only can predict the scores of the component “physical aggression with unknowns”. 105
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Program & Abstract Book - EPFL Latsis Symposium 2009

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