Amygdala plays important role in emotional memories.  Amygdala receives a variety of inputs from all lobes of cerebral cortex, hippcampus, and cingulate gyrus.  And also virtually all the sensory information is delivered to a particular nuclear called basolateral nuclei in amygdala.  The bilateral lesion of amygdala resulted in flattening emotions, reduced fear as well as some effects on aggression and memory.  There are reports that amygdalectomized rats approach a cat without hesitation.  In case of human(S.M.), there is a case of bilateral damage to amydgala due to Urbach-Wiethe disease, which is reported by Dr. Adolf Rudolf.  S.M. has normal intelligence and is perfectly able to identify people from photographs.  However, she has difficulty to recognize the photograph of people expressing certain emotion.  She is able to  recognize the face of happiness, sadness and disgust.  Description of  angry is somewhat impaired, and that of fear is severely impaired.  In addition, electric stimulation of amygdala in human has been reported to lead to anxiety and fear.