Knowledge Tree
alertness
Facts (13)
Sources
Why Sleep Matters: Consequences of Sleep Deficiency sleep.hms.harvard.edu 4 facts
measurementContinual wakefulness beyond approximately 16 hours generally leads to measurable changes in brain activity and alertness.
claimContinual wakefulness beyond approximately 16 hours leads to measurable changes in brain activity, as recorded by an electroencephalogram (EEG), which correspond to lower alertness and a propensity to sleep.
claimDr. Charles Czeisler identifies four factors that affect human alertness and performance.
claimSleep deprivation causes noticeable changes in brain activity as measured by an electroencephalogram (EEG), which correspond to lower alertness and a propensity to sleep.
Extent and Health Consequences of Chronic Sleep Loss and ... - NCBI ncbi.nlm.nih.gov 3 facts
claimThe optimal sleep duration for adolescents is approximately 9 hours per night, based on research regarding alertness, sleep-wake cycles, hormones, and circadian rhythms.
claimA study by Wesensten et al. (2002) compared the efficacy of modafinil versus caffeine in maintaining alertness and performance during periods of sleep deprivation.
referenceA 2003 study by Rizzo et al. published in Sleep found that chronic vagus nerve stimulation improves alertness and reduces rapid eye movement (REM) sleep in patients with refractory epilepsy.
Consciousness | Springer Nature Link link.springer.com Mar 29, 2017 2 facts
claimConsciousness is often defined more narrowly as a level of arousal, wakefulness, alertness, responsiveness, and adaptability, specifically in contrast to states of coma or sleep.
claimConsciousness is characterized by experiences of alertness, self-awareness, and attention of oneself relative to the environment, which involves awareness of one's own perceptions, associations, emotional experience, and the cognitive interpretation of these experiences.
Psychosocial Pathways - CDC cdc.gov Sep 1, 2023 1 fact
claimSleep health comprises several measurable dimensions: sleep duration (total amount of sleep per 24-hour day), sleep continuity or efficiency (ease of falling asleep and returning to sleep), timing (placement of sleep within the 24-hour day), alertness/sleepiness (ability to maintain attentive wakefulness), and satisfaction/quality (subjective assessment of “good” or “poor” sleep).
Investigating the impact of sleep quality on cognitive functions ... frontiersin.org 1 fact
claimCircadian rhythms govern physiological processes including hormone release, body temperature, and alertness, which fluctuate throughout the day.
Stress, Lifestyle, and Health - Maricopa Open Digital Press open.maricopa.edu 1 fact
claimPositive affect refers to pleasurable engagement with the environment, including states such as happiness, joy, enthusiasm, alertness, and excitement.
Cognitive Stress Management Therapy | CBT for Stress cognitivetherapynyc.com 1 fact
claimActivation of the sympathetic nervous system and the release of hormones from the adrenal gland cause physiological responses including increased heart rate, muscle tension, alertness, increased respiration rate, decreased gastrointestinal activity, and an inhibited inflammatory response.