locus coeruleus

locus coe·​ru·​le·​us | \ -si-ˈrü-lē-əs How to pronounce locus coeruleus (audio) \
variants: or less commonly locus ceruleus

Definition of locus coeruleus

: a bluish area of the brain stem with many norepinephrine-containing neurons

Examples of locus coeruleus in a Sentence

Recent Examples on the Web Dysfunction of the locus coeruleus, and the resulting breakdown of organized brain activity, has been related to several conditions, including Alzheimer’s disease and attention deficit hyperactivity disorder. Jason S. Tsukahara, Scientific American, 2 June 2021 Similarly, different types of fibers travel to different places, including a part of the brain called the locus coeruleus. Maddie Bender, Scientific American, 10 June 2021 One hypothesis is that people who have larger pupils at rest have greater regulation of activity by the locus coeruleus, which benefits cognitive performance and resting-state brain function. Jason S. Tsukahara, Scientific American, 2 June 2021 Pupil size is related to activity in the locus coeruleus, a nucleus situated in the upper brain stem with far-reaching neural connections to the rest of the brain. Jason S. Tsukahara, Scientific American, 2 June 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'locus coeruleus.' 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 locus coeruleus

1852, in the meaning defined above

History and Etymology for locus coeruleus

New Latin, literally, dark blue place

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Time Traveler for locus coeruleus

Time Traveler

The first known use of locus coeruleus was in 1852

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Dictionary Entries Near locus coeruleus

locus classicus

locus coeruleus

locus in quo

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Cite this Entry

“Locus coeruleus.” Dictionary, Merriam-Webster, Accessed 30 Nov. 2021.

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More Definitions for locus coeruleus

locus coeruleus

lo·​cus coe·​ru·​le·​us
variants: also locus ceruleus \ ˌlō-​kə(s)-​si-​ˈrü-​lē-​əs How to pronounce locus coeruleus (audio) \
plural loci coerulei also loci cerulei\ -​lē-​ˌī How to pronounce locus coeruleus (audio) \

Medical Definition of locus coeruleus

: a blue area of the brain stem with many norepinephrine-containing neurons


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