期刊
BEHAVIOURAL BRAIN RESEARCH
卷 293, 期 -, 页码 143-152出版社
ELSEVIER
DOI: 10.1016/j.bbr.2015.07.013
关键词
Dorsal periaqueductal gray matter; Dorsomedial hypothalamus; Dorsomedial part of ventromedial hypothalamus; N-Methyl-D-aspartic acid; Panic attacks
资金
- CNPq [483763/2010-1, 474853/2013-6, 130124/2012-5, 141124/2014-8, 501858/2005-9, 372654/2006-1, 372810/2008-0, 372877/2010-9]
- FAEPA [1291/97, 355/2000, 68/2001, 15/2003]
- FAPESP [2007/01174-1, 2012/03798-0, 2008/08955-1, 2010/151404, 2014/10742-7, 02/01497-1]
- Academy of Sciences for the Developing World (TWAS)- CNPq (Scientiae Doctor Fellowship process) [190316/2010-1]
Electrical stimulation of the periaqueductal gray matter and ventromedial hypothalamus in humans showed the involvement of both these structures in panic attacks. The aim of this work was to make clear the role of dorsal periaqueductal gray (dPAG) matter, dorsomedial hypothalamus (DMH) and the dorsomedial part of the ventromedial hypothalamus (dmVMH) in panic attack-like behaviors. DMH, dmVMH and dPAG of Wistar rats were treated with N-methyl-D-aspartic acid (NMDA) at different doses. The rodents were then kept in a polygonal arena with a burrow to record panic attack-like responses and oriented defensive behaviors. In dmVMH, 6 nmol of NMDA elicited alertness, freezing and oriented escape. The same set of behaviors was elicited by DMH neurons when stimulated by 9 nmol of NMDA. Treatment of dmVMH with 9 nmol of NMDA elicited typical explosive behaviors followed by freezing and oriented behaviors. The stimulation of the dPAG with NMDA at different doses provoked alertness and freezing (1 nmol) or alertness, freezing, tail twitching, explosive behavior and oriented escape (3 nmol), and explosive behavior followed by long-lasting freezing (6 nmol). These data suggest that mainly dPAG plays a role in panic attack-like behaviors that resemble panic syndrome in humans. However, hypothalamic nuclei like dmVMH that mainly elicits oriented escape, can also produce explosive reaction when stimulated with 9 nmol NMDA, whereas, DMH plays a role in coordinating defensive behaviors. (C) 2015 Elsevier B.V. All rights reserved.
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