Abstract：
:The locus coeruleus (LC) supplies norepinephrine (NE) to the entire forebrain and regulates many fundamental brain functions. Studies in humans have suggested that strong LC activation might shift network connectivity to favor salience processing. To causally test this hypothesis, we use a mouse model to study the effect of LC stimulation on large-scale functional connectivity by combining chemogenetic activation of the LC with resting-state fMRI, an approach we term "chemo-connectomics." We show that LC activation rapidly interrupts ongoing behavior and strongly increases brain-wide connectivity, with the most profound effects in the salience and amygdala networks. Functional connectivity changes strongly correlate with transcript levels of alpha-1 and beta-1 adrenergic receptors across the brain, and functional network connectivity correlates with NE turnover within select brain regions. We propose that these changes in large-scale network connectivity are critical for optimizing neural processing in the context of increased vigilance and threat detection.
journal_name
Neuronjournal_title
Neuronauthors
Zerbi V,Floriou-Servou A,Markicevic M,Vermeiren Y,Sturman O,Privitera M,von Ziegler L,Ferrari KD,Weber B,De Deyn PP,Wenderoth N,Bohacek Jdoi
10.1016/j.neuron.2019.05.034subject
Has Abstractpub_date
2019-08-21 00:00:00pages
702-718.e5issue
4eissn
0896-6273issn
1097-4199pii
S0896-6273(19)30487-8journal_volume
103pub_type
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