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Cole, Sindy; McNally, Gavan P. – Learning & Memory, 2007
Pavlovian fear learning depends on predictive error, so that fear learning occurs when the actual outcome of a conditioning trial exceeds the expected outcome. Previous research has shown that opioid receptors, including [mu]-opioid receptors in the ventrolateral quadrant of the midbrain periaqueductal gray (vlPAG), mediate such predictive fear…
Descriptors: Stimuli, Fear, Classical Conditioning, Relaxation Training