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Title: | Lateral habenula regulates temporal pattern organization of rat exploratory behavior and acute nicotine-induced anxiety in hole board |
Authors: | Casarrubea, Maurizio Davies, Caitlin Faulisi, Fabiana Partridge, Lucy Chambers, Stephanie Pierucci, Massimo Colangeli, Roberto Cassar, Daniel Valentino, Mario Muscat, Richard Benigno, Arcangelo Crescimanno, Giuseppe Di Giovanni, Giuseppe |
Keywords: | Anxiety Serotonin Dopamine Animal behavior Nicotine -- Health aspects Observation (Scientific method) |
Issue Date: | 2013-01-23 |
Publisher: | Frontiers Research Foundation |
Citation: | Casarrubea, M., Davies, C., Faulisi, F., Partdrige, L., Chambers, S., Pierucci, M., ...Di Giovanni, G. (2013). Lateral habenula regulates temporal pattern organization of rat exploratory behavior and acute nicotine-induced anxiety in hole board. Frontiers in Cellular Neuroscience. |
Abstract: | Nicotine is one of the most addictive drugs of abuse. Tobacco smoking is a major cause of many health problems worldwide, and is the first preventable cause of death. Several findings show that nicotine exerts significant aversive as well as the well-known rewarding motivational effects. Less certain is the anatomical substrate that mediates or enables nicotine aversion. Here we have focused on nicotine-induced anxiety-like behavior in unlesioned and lesioned lateral habenula (LHb) rats. Firstly, we showed that acute nicotine induces anxiogenic effects in rats at the doses investigated (0.1, 0.5, and 1.0 mg/kg, i.p.) as measured by the hole-board apparatus, and manifested in behaviors such as decreased rearing and head-dipping and increased grooming. No changes in locomotor behavior were observed at any of the nicotine doses given. T-pattern analysis of the behavioral outcomes revealed a drastic reduction and disruption of complex behavioral patterns induced by all three nicotine doses, with the maximum effect for 1 mg/kg. Lesion of the LHb induced a significant anxiogenic effect, reduced the mean occurrences of T-patterns detected, and strikingly reverted the nicotine-induced anxiety to an anxiolytic effect. We suggest that LHb is critically involved in emotional behavior states and in nicotine-induced anxiety, most likely through modulating serotonergic/dopaminergic nuclei. |
URI: | https://www.um.edu.mt/library/oar/handle/123456789/53401 |
Appears in Collections: | Scholarly Works - FacM&SPB |
Files in This Item:
File | Description | Size | Format | |
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Lateral Habenula Regulates Temporal Pattern Organization of Rat exploratory Behavior and Acute Nicotine-induced Anxiety in Hole-Board.pdf | 6.91 MB | Adobe PDF | View/Open |
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