active vocabulary. The definition of active vocabulary is the set of words that a person, group or profession is familiar with using. An example of an active vocabulary is the set of words that a toddler knows and uses. active-vocabulary. The collection of words and phrases that someone commonly uses in speech and writing.
Without adequate sleep, your brain has a harder time absorbing and recalling new information. Sleep does more than help sharpen the mind. Studies show that sleep affects physical reflexes, fine motor skills, and judgment, too.One study showed that participants who were sleep deprived were more likely to think they were right when they were, in fact, wrong.he Power of Sleep. Imaging and behavioral studies continue to show the critical role sleep plays in learning and memory. Researchers believe that sleep affects learning and memory in two ways: 1  Lack of sleep impairs a person's ability to focus and learn efficiently.
Sleep-promoting cells within the hypothalamus and the brain stem produce a brain chemical called GABA, which acts to reduce the activity of arousal centers in the hypothalamus and the brain stem. The brain stem (especially the pons and medulla) also plays a special role in REM sleep; it sends signals to relax muscles essential for body posture and limb movements, so that we donât act out our dreams.