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Cereb Cortex. 2016 Aug;26(8):3413-27. doi: 10.1093/cercor/bhv172. Epub 2015 Jul 28.

Resting-State Functional Connectivity of the Locus Coeruleus in Humans: In Comparison with the Ventral Tegmental Area/Substantia Nigra Pars Compacta and the Effects of Age.

Author information

1
Department of Psychiatry.
2
Department of Internal Medicine, Yale University, New Haven, CT 06519, USA Medical Service, VA Connecticut Health Care System, West Haven, CT 06516, USA.
3
Department of Psychiatry Department of Neurobiology Interdepartmental Neuroscience Program, Yale University, New Haven, CT 06520, USA Connecticut Mental Health Center, New Haven, CT 06519, USA.

Abstract

The locus coeruleus (LC) provides the primary noradrenergic inputs to the cerebral cortex. Despite numerous animal studies documenting the functions of the LC, research in humans is hampered by the small volume of this midbrain nucleus. Here, we took advantage of a probabilistic template, explored the cerebral functional connectivity of the LC with resting-state fMRI data of 250 healthy adults, and verified the findings by accounting for physiological noise in another data set. In addition, we contrasted connectivities of the LC and the ventral tegmental area/substantia nigra pars compacta. The results highlighted both shared and distinct connectivity of these 2 midbrain structures, as well as an opposite pattern of connectivity to bilateral amygdala, pulvinar, and right anterior insula. Additionally, LC connectivity to the fronto-parietal cortex and the cerebellum increases with age and connectivity to the visual cortex decreases with age. These findings may facilitate studies of the role of the LC in arousal, saliency responses and cognitive motor control and in the behavioral and cognitive manifestations during healthy and disordered aging. Although the first to demonstrate whole-brain LC connectivity, these findings need to be confirmed with high-resolution imaging.

KEYWORDS:

VTA; dopamine; locus ceruleus; noradrenaline; resting-state functional connectivity

PMID:
26223261
PMCID:
PMC4961017
DOI:
10.1093/cercor/bhv172
[Indexed for MEDLINE]
Free PMC Article

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