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Behav Brain Res. 2015 Jan 15;277:89-98. doi: 10.1016/j.bbr.2014.09.016. Epub 2014 Sep 16.

The role of lateral habenula-dorsal raphe nucleus circuits in higher brain functions and psychiatric illness.

Author information

1
Department of Physiology, College of Basic Medical Sciences, Jilin University, Changchun 130021, PR China. Electronic address: Zhua@jlu.edu.cn.
2
Department of Physiology, College of Basic Medical Sciences, Jilin University, Changchun 130021, PR China.
3
Departments of Psychiatry and Psychology & Neuroscience, Dalhousie University, Halifax, Nova Scotia, B3H 2E2, Canada.

Abstract

Serotonergic neurons in the dorsal raphe nucleus (DRN) play an important role in regulation of many physiological functions. The lateral nucleus of the habenular complex (LHb) is closely connected to the DRN both morphologically and functionally. The LHb is a key regulator of the activity of DRN serotonergic neurons, and it also receives reciprocal input from the DRN. The LHb is also a major way-station that receives limbic system input via the stria medullaris and provides output to the DRN and thereby indirectly connects a number of other brain regions to the DRN. The complex interactions of the LHb and DRN contribute to the regulation of numerous important behavioral and physiological mechanisms, including those regulating cognition, reward, pain sensitivity and patterns of sleep and waking. Disruption of these functions is characteristic of major psychiatric illnesses, so there has been a great deal of interest in how disturbed LHb-DRN interactions may contribute to the symptoms of these illnesses. This review summarizes recent research related to the roles of the LHb-DRN system in regulation of higher brain functions and the possible role of disturbed LHb-DRN function in the pathogenesis of psychiatric disorders, especially depression.

KEYWORDS:

Cognition; Depression; Dopamine; Dorsal raphe nucleus; Lateral habenula; Pain; Reward; Serotonin; Sleep

PMID:
25234226
DOI:
10.1016/j.bbr.2014.09.016
[Indexed for MEDLINE]

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