amygdala

noun
amyg·​da·​la | \ ə-ˈmig-də-lə How to pronounce amygdala (audio) \
plural amygdalae\ ə-​ˈmig-​də-​ˌlē How to pronounce amygdalae (audio) , -​ˌlī \

Definition of amygdala

: the one of the four basal ganglia in each cerebral hemisphere that is part of the limbic system and consists of an almond-shaped mass of gray matter in the anterior extremity of the temporal lobe

called also amygdaloid nucleus

Examples of amygdala in a Sentence

Recent Examples on the Web

When a stressor occurs, the amygdala region perceives the threat and sends a distress signal to the hypothalamus, which acts like a command center. Bridget Alex, Discover Magazine, "What Science Says About Why You're Stressed and How to Cope," 21 June 2019 Your amygdala appears to kickstart this survival mechanism, better known as your fight-or-flight response. Natasha Lavender, SELF, "This Is the Difference Between Feeling Anxious and Having an Anxiety Disorder," 16 May 2019 Anxiety is physiological, influenced by a delicate balance of hormones and the tug of war between the amygdala and the prefrontal cortex. Caroline Foran, Glamour, "No, You Don’t Have to ‘Justify’ Your Anxiety," 27 Mar. 2019 The olfactory bulb sends information to the amygdala, which is involved with experiencing emotions, and the hippocampus, the memory center. April Long, Marie Claire, "Aromatherapy Perfumes: Do They Really Work?," 20 Feb. 2019 Hormones released in the amygdala itself also have been shown to affect bravery. Rowan Hooper, WSJ, "The Biology of Bravery—and Fear," 19 Oct. 2018 And without it, the parts of the brain that deal with attachment and fear — the amygdala and hippocampus — develop differently. William Wan, chicagotribune.com, "What separation from parents does to children: 'The effect is catastrophic'," 18 June 2018 Connections between the amygdala and hippocampus were also weak in the infected macaques, which suggests signals sent between those two areas—ones that would help the infants recognize and respond to stressful situations—would be slow or spotty. Dina Fine Maron, Scientific American, "Zika Exposure Even after Birth May Lead to Brain Damage," 4 Apr. 2018 Not completely away, but in a synaptic cabinet beneath my amygdala. Abby Ellin, Marie Claire, "I Almost Married a Con Man," 8 Jan. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'amygdala.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of amygdala

1845, in the meaning defined above

History and Etymology for amygdala

New Latin, from Latin, almond, from Greek amygdalē

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Last Updated

5 Jul 2019

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The first known use of amygdala was in 1845

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More Definitions for amygdala

amygdala

noun
amyg·​da·​la | \ ə-ˈmig-də-lə How to pronounce amygdala (audio) \
plural amygdalae\ -​ˌlē How to pronounce amygdalae (audio) , -​ˌlī How to pronounce amygdalae (audio) \

Medical Definition of amygdala

: the one of the four basal ganglia in each cerebral hemisphere that is part of the limbic system and consists of an almond-shaped mass of gray matter in the roof of the lateral ventricle

called also amygdaloid body, amygdaloid nucleus

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More from Merriam-Webster on amygdala

Nglish: Translation of amygdala for Spanish Speakers

Britannica English: Translation of amygdala for Arabic Speakers

Britannica.com: Encyclopedia article about amygdala

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