Gourt > Health > Conditions and Diseases > Sleep Disorders > Biological Rhythms
Rhythm (Greek ρυθμός = flow (in Modern Greek = 'style') is the variation of the accentuation of sounds or other events over time. "Rhythm involves patterns of duration that are phenomenally present in the music" with duration perceived by interonset interval (London 2004, p.4). When governed by rule, it is called meter. It is inherent in any time-dependent medium, but it is most associated with music, dance, and the majority of poetry. The study of rhythm, stress, and pitch in speech is called prosody; it is a topic in linguistics. All musicians, instrumentalists and vocalists, work with rhythm, but it is often considered the primary domain of drummers and percussionists.
In Western music, rhythms are usually arranged with respect to a time signature, partially signifying a meter. The speed of the underlying pulse, called the beat, is the tempo. The tempo is usually measured in 'beats per minute' (bpm); 60 bpm means a speed of one beat per second. The length of the meter, or metric unit (usually corresponding with measure length), is usually grouped into either two or three beats, being called duple meter and triple meter, respectively. If each beat is grouped in two, it is simple meter, if in three compound meter.
Syncopated rhythms are rhythms that accent parts of the beat not already stressed by counting. Playing simultaneous rhythms in more than one time signature is called polymeter. See also polyrhythm. In recent years, rhythm and meter have become an important area of research among music scholars. Recent work in these areas includes books by Fred Lerdahl and Ray Jackendoff, Jonathan Kramer, Christopher Hasty, William Rothstein, and Joel Lester.
More on [ Rhythm ]
@annachadwick Yea I've been revising as much as I can, keep getting distracted!! I don't like biological rhythms one!
NinaaRose (Nina ) Sun, 13 Dec 2009 15:35:02 -0000
@annachadwick Yea I've been revising as much as I can, keep getting distracted!! I don't like biological rhythms one!
American Association of Medical Chronobiology and Chronotherapeutics - Provides an organizational framework for medical scientists, including academic and practicing physicians, interested in chronobiological phenomena.
Meta Description: [ The American Association for Medical Chronobiology and Chronotherapeutics (AAMCC) provides an organizational framework for scientists and healthcare professionals interested in the medical application of chronobiology and chronotherapeutics. ]
American Society for Gravitational and Space Biology -- Desert Beetle Circadian Rhythm Study Begins on Mir - When Space Shuttle Atlantis docked with Mir on May 15, it delivered 64 desert beetles for a circadian rhythm study to understand how the space flight environment changes the body's internal clock.
Center for Biological Timing Home Page - The National Science Foundation Center for Biological Timing. Tutorials and original papers on biological timing.
Circadian Sleep Disorders Association - Support and providing information to those affected by circadian sleep disorders such as Delayed Sleep Phase Syndrome. Includes links, FAQs, message board and a mailing list.
Delayed Sleep Phase Syndrome - Comprehensive site with symptoms, causes, treatments, and links to further information on DSPS and circadian rhythms.
Meta Description: [ Delayed sleep phase syndrome (DSPS) is a fairly common disorder of sleep timing. People with DSPS tend to fall asleep at very late times, and also have difficulty waking up in time for normal work, school, or social needs. People with DSPS and their families can find here a description of the syn... ]
Dr. Postolache - The Institute for Sports Chronobiology - Consulting on optimizing sports performance via optimizing sleep-wake schedules and biological rhythms.
Light Sets the Molecular Controls of Circadian Rhythm - Work conducted at the Rockefeller University indicates that light can reset the biological clock.
Mental Health Net - Circadian Rhythm Sleep Disorder Symptoms - General symptoms of circadian rhythm sleep disorder.
Scientists Find Eye Pigment Controls Circadian Rhythm - A brief report on an eye pigment, cryptochrome, which appears to control mammals' circadian rhythms.
Meta Description: [ CHAPEL HILL - New research by University of North Carolina at
Chapel Hill scientists has proven that a light-sensitive
pigment they discovered in the eye, the skin and part of the
brain controls the body's internal clock. ]
Society for Light Treatment and Biological Rhythms - A not-for-profit international organization founded in 1988 which aims to foster research, professional development and clinical applications in the fields of light therapy and biological rhythms.
The Brain, Circadian Rhythms, and Clock Genes - British Medical Journal Article on circadian rhythms (1998). A clinical review.
| TETRA FALSE TREES | |
| Next Video | |
