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Power Nap
A power nap or cat nap is a short sleep that terminates before deep sleep (slow-wave sleep; SWS). A power nap is intended to quickly revitalize the sleeper. A power nap combined with consuming caffeine is called a stimulant nap, coffee nap, caffeine nap, or nappuccino. Characteristics A power nap, also known as a Stage 2 nap, is a short slumber of 20 minutes or less which terminates before the occurrence of deep slow-wave sleep, intended to quickly revitalize the napper. The expression "power nap" was coined by Cornell University social psychologist James Maas. The 20-minute nap increases alertness and motor skills. Various durations may be recommended for power naps, which are short compared to regular sleep. The short duration prevents nappers from sleeping so long that they enter the slow wave portion of the normal sleep cycle without being able to complete the cycle. Entering deep, slow-wave sleep and failing to complete the normal sleep cycle, can result in a phenomenon kno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coronary Circulation
Coronary circulation is the Circulatory system#Coronary vessels, circulation of blood in the arteries and veins that supply the cardiac muscle, heart muscle (myocardium). Coronary arteries supply oxygen saturation (medicine), oxygenated blood to the heart muscle. #Cardiac veins, Cardiac veins then drain away the blood after it has been deoxygenated. Because the rest of the body, and most especially the brain, needs a steady supply of oxygenated blood that is free of all but the slightest interruptions, the heart is required to function continuously. Therefore its circulation is of major importance not only to its own tissues but to the entire body and even the level of consciousness of the brain from moment to moment. Interruptions of coronary circulation quickly cause heart attacks (myocardial infarctions), in which the heart muscle is damaged by hypoxia (medical), oxygen starvation. Such interruptions are usually caused by coronary ischemia linked to coronary artery disease, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sleep (journal)
''Sleep'' is a monthly peer-reviewed medical journal covering research on sleep. Topics include basic and neuroscience studies of sleep, in vitro and animal models of sleep, studies in clinical or population samples, clinical trials, and epidemiologic studies. It is the official journal of the Sleep Research Society. The journal was established in 1978 and the editor-in-chief is Allan I. Pack (University of Pennsylvania). Abstracting and indexing The journal is abstracted and indexed in: According to the ''Journal Citation Reports'', the journal has a 2023 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a type of journal ranking. Journals with higher impact factor values are considered more prestigious or important within their field. The Impact Factor of a journa ... of 5.3. References External links * Sleep medicine journals Oxford University Press academic journals Monthly journals English-language journals Delayed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cardiovascular Disease
Cardiovascular disease (CVD) is any disease involving the heart or blood vessels. CVDs constitute a class of diseases that includes: coronary artery diseases (e.g. angina, heart attack), heart failure, hypertensive heart disease, rheumatic heart disease, cardiomyopathy, arrhythmia, congenital heart disease, valvular heart disease, carditis, aortic aneurysms, peripheral artery disease, thromboembolic disease, and venous thrombosis. The underlying mechanisms vary depending on the disease. It is estimated that dietary risk factors are associated with 53% of CVD deaths. Coronary artery disease, stroke, and peripheral artery disease involve atherosclerosis. This may be caused by high blood pressure, smoking, diabetes mellitus, lack of exercise, obesity, high blood cholesterol, poor diet, excessive alcohol consumption, and poor sleep, among other things. High blood pressure is estimated to account for approximately 13% of CVD deaths, while tobacco accounts for 9%, di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alzheimer's Dementia
Alzheimer's disease (AD) is a neurodegenerative disease and the cause of 60–70% of cases of dementia. The most common early symptom is difficulty in remembering recent events. As the disease advances, symptoms can include problems with language, disorientation (including easily getting lost), mood swings, loss of motivation, self-neglect, and behavioral issues. As a person's condition declines, they often withdraw from family and society. Gradually, bodily functions are lost, ultimately leading to death. Although the speed of progression can vary, the average life expectancy following diagnosis is three to twelve years. The causes of Alzheimer's disease remain poorly understood. There are many environmental and genetic risk factors associated with its development. The strongest genetic risk factor is from an allele of apolipoprotein E. Other risk factors include a history of head injury, clinical depression, and high blood pressure. The progression of the disease is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sara Mednick
Sara C. Mednick is a sleep researcher at the University of California, Irvine. Her research focuses on the relationship between napping and performance. She is the author of several papers and a mass market book, ''Take a Nap! Change Your Life.'' She graduated with her PhD in psychology from Harvard University studying under Ken Nakayama and Robert Stickgold. Mednick contends that humans have a biological need for an afternoon nap. "There's actually biological dips in our rhythm and in our alertness that seem to go along with the natural state of the way we used to be, probably from way back when we were allowed to nap more regularly," she told Diane Sawyer on ''Good Morning America.'' "There is something very specific about the timing of the nap," she is quoted as saying in ''The Times'' (London). "It should be at about 2pm or 3pm. It's the time when most humans and animals experience what is called a post-prandial dip or low ebb. It's a dip in cogno-processing and physiologi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nature Neuroscience
''Nature Neuroscience'' is a monthly scientific journal published by Nature Publishing Group. Its focus is original research papers relating specifically to neuroscience and was established in May 1998. The chief editor is Shari Wiseman. According to the ''Journal Citation Reports'', ''Nature Neuroscience'' had a 2024 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a type of journal ranking. Journals with higher impact factor values are considered more prestigious or important within their field. The Impact Factor of a journa ... of 19.5. References External links * Neuroscience journals Nature Research academic journals Academic journals established in 1998 Monthly journals English-language journals {{neuroscience-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Information Overload
Information overload (also known as infobesity, infoxication, or information anxiety) is the difficulty in understanding an issue and Decision making, effectively making decisions when one has too much information (TMI) about that issue, and is generally associated with the excessive quantity of daily information. The term "information overload" was first used as early as 1962 by scholars in management and information studies, including in Bertram Gross' 1964 book ''The Managing of Organizations'' and was further popularized by Alvin Toffler in his bestselling 1970 book ''Future Shock.'' Speier et al. (1999) said that if input exceeds the processing capacity, information overload occurs, which is likely to reduce the quality of the decisions. In a newer definition, Roetzel (2019) focuses on time and resources aspects. He states that when a decision-maker is given many sets of information, such as complexity, amount, and contradiction, the quality of its decision is decreased beca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Pennsylvania School Of Medicine
The Perelman School of Medicine (commonly known as Penn Med) is the medical school of the University of Pennsylvania, a Private university, private, Ivy League research university located in Philadelphia. Founded in 1765, the Perelman School of Medicine is the List of medical schools in the United States, oldest medical school in the United States. Today, the Perelman School of Medicine is a major center of biomedical research and education with over 2,900 faculty members and nearly $1 billion in annual sponsored program awards. History 18th century The founding of a school of medicine was proposed by John Morgan (physician), John Morgan, a graduate of the Academy and College of Philadelphia, College of Philadelphia and the University of Edinburgh Medical School. After training in Edinburgh and other European cities, Morgan returned to Philadelphia in 1765. With fellow University of Edinburgh Medical School graduate William Shippen Jr., Morgan persuaded the college's trustees ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David F
David (; , "beloved one") was a king of ancient Israel and Judah and the third king of the United Monarchy, according to the Hebrew Bible and Old Testament. The Tel Dan stele, an Aramaic-inscribed stone erected by a king of Aram-Damascus in the late 9th/early 8th centuries BCE to commemorate a victory over two enemy kings, contains the phrase (), which is translated as " House of David" by most scholars. The Mesha Stele, erected by King Mesha of Moab in the 9th century BCE, may also refer to the "House of David", although this is disputed. According to Jewish works such as the '' Seder Olam Rabbah'', '' Seder Olam Zutta'', and ''Sefer ha-Qabbalah'' (all written over a thousand years later), David ascended the throne as the king of Judah in 885 BCE. Apart from this, all that is known of David comes from biblical literature, the historicity of which has been extensively challenged,Writing and Rewriting the Story of Solomon in Ancient Israel; by Isaac Kalimi; page 32; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NASA
The National Aeronautics and Space Administration (NASA ) is an independent agencies of the United States government, independent agency of the federal government of the United States, US federal government responsible for the United States's civil list of government space agencies, space program, aeronautics research and outer space, space research. National Aeronautics and Space Act, Established in 1958, it succeeded the National Advisory Committee for Aeronautics (NACA) to give the American space development effort a distinct civilian orientation, emphasizing peaceful applications in space science. It has since led most of America's space exploration programs, including Project Mercury, Project Gemini, the 1968–1972 Apollo program missions, the Skylab space station, and the Space Shuttle. Currently, NASA supports the International Space Station (ISS) along with the Commercial Crew Program and oversees the development of the Orion (spacecraft), Orion spacecraft and the Sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jet Lag
Jet lag is a temporary physiological condition that occurs when a person's circadian rhythm is out of sync with the time zone they are in, and is a typical result from travelling rapidly across multiple time zones (east–west or west–east). For example, someone travelling from New York to London, i.e. from west to east, feels as if the time were five hours ''earlier'' than local time, and someone travelling from London to New York, i.e. from east to west, feels as if the time were five hours ''later'' than local time. The phase shift when travelling from east to west is referred to as ''phase-delay'' of the circadian cycle, whereas going west to east is ''phase-advance'' of the cycle. Most travellers find that it is harder to adjust time zones when travelling east. Jet lag is caused by a misalignment between the internal circadian clock and the external environment, and it has been classified within the category of a circadian rhythm sleep-wake disorder, reflecting its bas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
