Authors

Strobel, Cornelia Marek, Roger Gooch, Helen M. M Sullivan, Robert K.P. K P Sah, Pankaj

Affiliations

The Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia.

Application Area

Optogenetics

Electrophysiological Techniques

Abstract

The basolateral amygdala (BLA) and prefrontal cortex (PFC) are partners in fear learning and extinction. Intercalated (ITC) cells are inhibitory neurons that surround the BLA. Lateral ITC (lITC) neurons provide feed-forward inhibition to BLA principal neurons, whereas medial ITC (mITC) neurons form an inhibitory interface between the BLA and central amygdala (CeA). Notably, infralimbic prefrontal (IL) input to mITC neurons is thought to play a key role in fear extinction. Here, using targeted optogenetic stimulation, we show that lITC neurons receive auditory input from cortical and thalamic regions. IL inputs innervate principal neurons in the BLA but not mITC neurons. These results suggest that (1) these neurons may play a more central role in fear learning as both lITCs and mITCs receive auditory input and that (2) mITC neurons cannot be driven directly by the IL, and their role in fear extinction is likely mediated via the BLA.

Extract

… “470 nm long (CAIRN OptoLED or CoolLED), and”…

Product Associated Features

pE-100: A range of compact, simple-to-use, single wavelength illumination systems for screening fluorescence.

Diascopic Technique

-

Live Cell Issues

-

Product Type

pE-100

Journal

Cell Reports

Year of Publication

2015

Country of Publication

Australia