Definition of reticular formation
: a mass of nerve cells and fibers situated primarily in the brain stem that plays an important role in controlling autonomic functions (such as respiration), reflexive movement, posture and balance, and consciousness and the sleep-wake cycle
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“Reticular formation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/reticular%20formation. Accessed 18 Apr. 2021.
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The first known use of reticular formation was in 1887
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