Processing of temporal unpredictability in human and animal amygdala

Herry, Cyril; Bach, Dominik R; Esposito, Fabrizio; Di Salle, Francesco; Perrig, Walter J.; Scheffler, Klaus; Lüthi, Andreas; Seifritz, Erich (2007). Processing of temporal unpredictability in human and animal amygdala. Journal of neuroscience, 27(22), pp. 5958-5966. Washington, D.C.: Society for Neuroscience 10.1523/JNEUROSCI.5218-06.2007

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The amygdala has been studied extensively for its critical role in associative fear conditioning in animals and humans. Noxious stimuli, such as those used for fear conditioning, are most effective in eliciting behavioral responses and amygdala activation when experienced in an unpredictable manner. Here, we show, using a translational approach in mice and humans, that unpredictability per se without interaction with motivational information is sufficient to induce sustained neural activity in the amygdala and to elicit anxiety-like behavior. Exposing mice to mere temporal unpredictability within a time series of neutral sound pulses in an otherwise neutral sensory environment increased expression of the immediate-early gene c-fos and prevented rapid habituation of single neuron activity in the basolateral amygdala. At the behavioral level, unpredictable, but not predictable, auditory stimulation induced avoidance and anxiety-like behavior. In humans, functional magnetic resonance imaging revealed that temporal unpredictably causes sustained neural activity in amygdala and anxiety-like behavior as quantified by enhanced attention toward emotional faces. Our findings show that unpredictability per se is an important feature of the sensory environment influencing habituation of neuronal activity in amygdala and emotional behavior and indicate that regulation of amygdala habituation represents an evolutionary-conserved mechanism for adapting behavior in anticipation of temporally unpredictable events.

Item Type: Journal Article (Original Article)
Division/Institute: 04 Faculty of Medicine > University Psychiatric Services > University Hospital of Psychiatry and Psychotherapy > Management
07 Faculty of Human Sciences > Institute of Psychology > Experimental Psychology and Neuropsychology
UniBE Contributor: Bach, Dominik; Esposito, Fabio; Perrig, Walter and Seifritz, Erich
ISSN: 0270-6474
Publisher: Society for Neuroscience
Language: English
Submitter: Factscience Import
Date Deposited: 04 Oct 2013 14:55
Last Modified: 11 Jul 2014 12:16
Publisher DOI: 10.1523/JNEUROSCI.5218-06.2007
PubMed ID: 17537966
Web of Science ID: 000247048700015
URI: http://boris.unibe.ch/id/eprint/23309 (FactScience: 41243)

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