a of a verb or voice : showing that the subject of a sentence is the one doing the action expressed by the verb. âPickedâ in âI picked the applesâ is an active verb because it shows that the subject âIâ is the one who picked the apples.
Sleep deprivation is the condition of not having enough sleep; it can be either chronic or acute. A chronic sleep-restricted state can cause fatigue, daytime sleepiness, clumsiness and weight loss or weight gain. It adversely affects the brain and cognitive function. However, in a subset of cases sleep deprivation can, paradoxically, lead to increased energy and alertness and enhanced mood; it has even been used as a treatment for depression (see below). Few studies have compared the effects of acute total sleep deprivation and chronic partial sleep restriction.
Sleep deprivation boosts anticipatory anxiety. UC Berkeley researchers have found that a lack of sleep, which is common in anxiety disorders, may play a key role in ramping up the brain regions that contribute to excessive worrying. Sleep deprivation can drive up anticipatory anxiety in even healthy adults, new study shows (iStockphoto) Neuroscientists have found that sleep deprivation amplifies anticipatory anxiety by firing up the brainâs amygdala and insular cortex, regions associated with emotional processing. The resulting pattern mimics the abnormal neural activity seen in anxiety disorders.