The amygdala is the brain's radar for threat, a trigger point for emotional distress (e.g., anger, fear, impulse). It can hijack the rest of the brain (especially the pre-frontal cortex) in an instant. During a hijack you can't learn, cannot be innovative or flexible, and may have memory failure. (Goleman, Daniel. The Brain and Emotional Intelleigence: New Insights. p 29-31. MA: More Than Sounds, 2011)