forebrain

noun

fore·​brain ˈfȯr-ˌbrān How to pronounce forebrain (audio)
: the anterior of the three primary divisions of the developing vertebrate brain or the corresponding part of the adult brain that includes especially the cerebral hemispheres, the thalamus, and the hypothalamus and that especially in higher vertebrates is the main control center for sensory and associative information processing, visceral functions, and voluntary motor functions

called also prosencephalon

compare diencephalon, telencephalon

Examples of forebrain in a Sentence

Recent Examples on the Web There are three basic units of an vertebrate brain–the midbrain, forebrain, and the hindbrain. Laura Baisas, Popular Science, 22 Feb. 2024 Or if not laughter, then perhaps just a faint tickle in the forebrain, as of a very tiny problem, solved. James Parker, The Atlantic, 6 Oct. 2023 In order to test how exactly the cells influence sleep need, the team focused in on astrocytes in an area of the brain called the basal forebrain, which is known for having a large impact on sleep. Jackie Appel, Popular Mechanics, 21 Aug. 2023 Besides the dorsal cortex, researchers were able to grow, among other regions, parts of the ventral forebrain, which makes neurons that connect to the cortex, and the choroid plexus, which generates spinal fluid. Kat McGowan, Discover Magazine, 6 Jan. 2014 Humans process sensory information and critical decision making in the forebrain. Gabe Allen, Discover Magazine, 1 Sep. 2022 Green staining shows the neurons in the olfactory pits, forebrain, and elsewhere, while red shows retinal ganglion cells in the eyes and some midbrain neurons. Discover Magazine, 12 Oct. 2010 In the marine bristleworm, clocks exist in its forebrain and peripheral tissues of its trunk. Virat Markandeya, Smithsonian Magazine, 8 Mar. 2023 Those nerves pass through a bony plate to reach the olfactory bulb, a small neural structure in the forebrain. IEEE Spectrum, 17 Oct. 2022

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'forebrain.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1879, in the meaning defined above

Time Traveler
The first known use of forebrain was in 1879

Dictionary Entries Near forebrain

Cite this Entry

“Forebrain.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/forebrain. Accessed 16 Apr. 2024.

Kids Definition

forebrain

noun
fore·​brain ˈfō(ə)r-brān How to pronounce forebrain (audio)
ˈfȯ(ə)r-
: the front division of the embryonic brain of a vertebrate animal or the parts developed from it

Medical Definition

forebrain

noun
fore·​brain -ˌbrān How to pronounce forebrain (audio)
: the anterior of the three primary divisions of the developing vertebrate brain or the corresponding part of the adult brain that includes especially the cerebral hemispheres, the thalamus, and the hypothalamus and that especially in higher vertebrates is the main control center for sensory and associative information processing, visceral functions, and voluntary motor functions

called also prosencephalon

see diencephalon, telencephalon

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