Brain Res. 1991 Mar 22;544(1):174-6.

Noradrenaline release in the rat amygdala is increased by stress: studies with intracerebral microdialysis.

Tanaka T, Yokoo H, Mizoguchi K, Yoshida M, Tsuda A, Tanaka M.

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Department of Pharmacology, Kurume University School of Medicine, Japan.

Abstract

The effects of immobilization and tail-pinch stress on extracellular noradrenaline (NA) release in the amygdala were studied in freely moving rats with intracerebral microdialysis techniques. After collection of basal levels of NA (2.63 +/- 0.26 pg/50 microliters/20 min), the rat was exposed to either immobilization stress or tail-pinch stress for 20 min. Immobilization and tail-pinch stress increased NA release to 250 and 243% of basal levels, respectively and the elevation of NA release was observed for 60 min and 40 min after release from stress, also respectively. These data suggest that microdialysis is a useful way to study extracellular NA release in the amygdala and that NA neurons in this region are activated by both immobilization and tail-pinch stress.

PMID:: 1855137; [PubMed - indexed for MEDLINE]

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Norepinephrine

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