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ScienceDaily: Amygdala
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Amygdala

The amygdala (Latin, corpus amygdaloideum) is an almond-shape set of neurons located deep in the brain's medial temporal lobe. Shown to play a key role in the processsing of emotions, the amygdala forms part of the limbic system. In humans and other animals, this subcortical brain structure is linked to both fear responses and pleasure. Its size is positively correlated with aggressive behavior across species. In humans, it is the most sexually-dimorphic brain structure, and shrinks by more than 30% in males upon castration. Conditions such as anxiety, autism, depression, post-traumatic stress disorder, and phobias are suspected of being linked to abnormal functioning of the amygdala, owing to damage, developmental problems, or neurotransmitter imbalance.
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Brain's Fear Center Likely Shrinks In Autism's Most Severely Socially Impaired (December 6, 2006) -- The brain's fear hub likely becomes abnormally small in the most severely socially impaired males with autism spectrum disorders. Teens and young men who were slowest at distinguishing emotional from ... > full story

How Brain Gives Special Resonance To Emotional Memories (June 10, 2004) -- If the emotional memory of a traumatic car accident or the thrill of first love are remembered with a special resonance, it is because they engage different brain structures than do normal memories, ... > full story

Scientists Uncover New Mechanism For The Amygdala In Fear Recognition (January 7, 2005) -- A look of fear on another person's face is instantly recognizable. The split-second ability of the amygdala, a small, almond-shaped structure deep in the brain, distinguishes fear in facial ... > full story

Amygdala -- The amygdala (Latin, corpus amygdaloideum) is an almond-shape set of neurons located deep in the brain's medial temporal lobe. Shown to play a key role in the processsing of emotions, the amygdala ... > full article

Temporal lobe -- The temporal lobes are part of the cerebrum. They lie at the sides of the brain, beneath the lateral or Sylvian fissure. Seen in profile, the human brain looks something like a boxing glove. The ... > full article

Limbic system -- The limbic system is the collective name for structures in the human brain involved in emotion, motivation, and emotional association with memory. It affects motivation and is more active in ... > full article

Hypothalamus -- In mammals, the hypothalamus is a region of the brain located below the thalamus, forming the major portion of the ventral region of the diencephalon and functioning to regulate certain metabolic ... > full article

Occipital lobe -- The occipital lobe is the visual processing center of the mammalian brain. The primary visual cortex is Brodmann area 17, located in the interior portion of the occipital lobe at the calcarine sulcus ... > full article

Anger -- Anger is a term for the emotional aspect of aggression, as a basic aspect of the stress response in animals in which a perceived aggravating stimulus "provokes" a counterresponse which is likewise ... > full article

Anxiety -- Anxiety is a complex combination of negative emotion that includes fear, apprehension and worry, and is often accompanied by physical sensations such as palpitations, chest pain and/or shortness of ... > full article

Visual cortex -- Visual cortex is the term applied to both the primary visual cortex and upstream visual cortical areas also known as extrastriate cortical areas. The visual cortex occupies about one third of the ... > full article

Rapid eye movement -- Rapid eye movement (REM) is the stage of sleep characterized by rapid saccadic movements of the eyes. During this stage, the activity of the brain's neurons is quite similar to that during waking ... > full article

Amnesia -- Amnesia (or amnaesia in Commonwealth English) is a condition in which memory is disturbed. The causes of amnesia are organic or functional. Organic causes include damage to the brain, through trauma ... > full article

 

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