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The Collaborative International Dictionary

Amygdala \A*myg"da*la\ ([.a]*m[i^]g"d[.a]*l[.a]), n.; pl. -l[ae] (-l[=e]). [L., an almond, fr. Gr. 'amygda`lh. See Almond.]

  1. An almond.

  2. (Anat.)

    1. One of the tonsils of the pharynx.

    2. One of the rounded prominences of the lower surface of the lateral hemispheres of the cerebellum, each side of the vallecula.

Douglas Harper's Etymology Dictionary

"the tonsils," 1540s (amygdal), from Latin, from Greek amygdale "almond" (see almond). The anatomical use is as a direct translation of Arabic al-lauzatani "the two tonsils," literally "the two almonds," so called by Arabic physicians for fancied resemblance. From early 15c. as amygdales "tonsils;" as "almonds" from mid-12c.


n. (context anatomy English) The region of the brain, located in the medial temporal lobe, believed to play a key role in the emotions, such as fear and pleasure, in both animals and humans.

  1. n. an almond-shaped neural structure in the anterior part of the temporal lobe of the cerebrum; intimately connected with the hypothalamus and the hippocampus and the cingulate gyrus; as part of the limbic system it plays an important role in motivation and emotional behavior [syn: amygdaloid nucleus, corpus amygdaloideum]

  2. [also: amygdalae (pl)]


The (singular: ; ; also ; Latin, from Greek , , 'almond', 'tonsil') are two almond-shaped groups of nuclei located deep and medially within the temporal lobes of the brain in complex vertebrates, including humans. Shown in research to perform a primary role in the processing of memory, decision-making, and emotional reactions, the amygdalae are considered part of the limbic system.

Amygdala (comics)

Amygdala is the alias of DC Comics character Aaron Helzinger, who is a sometime opponent of Batman. He has reduced mental capacity, near superhuman strength and endurance, and is prone to outbursts of violence due to medical experimentation on his brain, chiefly the removal of his amygdala.

Amygdala (disambiguation)

Amygdala (from Ancient Greek: ἀμυγδαλή amygdálē) is a Latin word meaning "almond". It can refer to:

  • Amygdala, part of the human brain
  • Amygdalin, a compound in almonds
  • Amygdalum, a genus of mussel
  • Amygdala (comics), a comic book character
  • Amygdala Music, the music composition arm of TV production company Original Productions
  • Amygdule or amygdale, infilled vesicles in rocks

Usage examples of "amygdala".

When activated,ACMPD 3N7 seemed to modify responses of the amygdala and cingulate gyrus in the brain.

All readings looked fine: glutamate, serotonin, do-pamine, cortical suppressant, amygdala regulator, P15, BDNF to strengthen the synaptic connections for learning in the hippocampus.

There is a small almond-shaped inclusion in the limbic system called the amygdala which is deeply involved in both aggression and fear.

At least some of the emotion-determining role of such limbic endocrine systems as the pituitary amygdala, and hypothalamus is provided by small hormonal proteins which they exude, and which affect other areas of the brain.

Other experiments have shown that activity in the area of the brain known as the amygdala is associated with the experience of fear, that the decisions of individual monkeys in certain games could be predicted by the firing patterns of individual neurons in the orbitofrontal-striatal circuits of the brain, that neurotransmitters known as propranolol and serotonin affect decision-making, and that the ventral putamen within the striatum is activated when people experience pleasure.

The subject demonstrated a sevenfold increase in serotonin receptors in hippocampal and amygdala tissue, compared to controls.

Psych that sometimes the sensory receptors send impulses straight to the amygdala, which controls emotional responses, bypassing the hypothalamus, which processes and relays the information to the brain.

On the other hand, naturally ferocious animals, such as the lynx, become docile and tolerate being petted and handled when their amygdalas are extirpated.

Electrical stimulation of the amygdala in placid domestic animals can rouse them to almost unbelievable states of fear or frenzy.

PET scans of working clairvoyants, my father found that the areas in the brain most important for clairvoyance were the same areas responsible for autism: the hippocampus, the amygdala, and the neocerebellum.

It could spot a misplaced word within a sentence, if that word created a lie of the whole, based on a scan of the waves that the amygdala, organic keeper of fear, produced as the lie was told.

There is a part called nucleus amygdalae that when stimulated, people fall in love with the first person they see, be it a man or a woman.

I believe that falling in love with someone just by seeing him, or after a brief chat, is due to some substance produced by the body, and I also think it has something to do with the nucleus amygdalae.

And one day I'll have a surgeon dig all the silicon out of my amygdalae, and I'll live with my own memories and nobody else's, the way other people do.

As well as I can tell with my simple field scanner, the nematodes terminate in the amygdala and other basal ganglia in each cerebral hemisphere.