The amygdala is the almond-shaped brain structure strongly involved in processing fear and other emotional responses.
There are two amygdalae, one in each cerebral hemisphere, located deep within the medial temporal lobes. The name comes from the Greek word for “almond,” reflecting the structure’s approximate shape. The amygdala is part of a group of interconnected nuclei that evaluate emotionally important stimuli.
Research has especially linked the amygdala with fear learning, threat detection, emotional memory, and responses to socially meaningful cues. It can influence bodily reactions through connections with the hypothalamus and brainstem, while connections with the cortex help people interpret and regulate emotional experiences.
The amygdala is not simply a “fear center.” It participates in processing positive emotions, reward-related signals, attention, and social information. Fear responses also depend on broader circuits, including sensory areas, the hippocampus, prefrontal regions, and periaqueductal gray. Damage or unusual activity can alter emotional learning without eliminating all emotional behavior.