Fear conditioning is a type of memory that involves pairing an aversive stimulus with either a neutral context or stimulus. This expression of fear response in the presence of the context or stimulus alone was identified. The conditioned fear response is described in terms of subjective, behavioral and physiological responses, which is also very stable and long lasting behavioral change is produced which helpful for the neurobehavioral, genetic, and pharmacological studies. Fear can also make changes in physical correlates such as increased heart rate and release of stress hormones. Fear learning is quick, powerful and long lasting. Changes in heart rate, breathing, and muscle responses can be noticed in conditioned fear. Amygdala, Hippocampus, Molecular mechanisms, Epigenetics are noticed due to fear conditioning disorder.
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