The limbic system includes the hippocampus, amygdala, cingulate gyrus, and mammillary bodies. The primary role of the amygdala in emotion processing is:

• A Long-term explicit memory consolidation for declarative facts
• B Spatial navigation and cognitive mapping via place cells
• C Modulation of hypothalamic hormone release via the fornix
• D Fear conditioning, emotional evaluation of stimuli, and initiation of autonomic fear responses ✓

Explanation

The amygdala (almond-shaped nucleus in the anterior temporal lobe) is the critical structure for fear conditioning and emotional evaluation of sensory stimuli. It receives direct sensory input (especially threat-related) and projects to the hypothalamus (autonomic responses), brainstem (motor aspects of fear), and prefrontal cortex (emotional regulation). Bilateral amygdala damage (Klüver-Bucy syndrome) results in psychic blindness, hyperorality, hypersexuality, and emotional placidity. The hippocampus handles declarative memory; place cells are in the hippocampus; fornix connects hippocampus to mammillary bodies.

Reference: BD Chaurasia's Human Anatomy, 8th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.