DiscussionWhat is biological rhythm?Biological rhythm is a periodic biological fluctuation in an organism that corresponds to and is in response to periodic environmental change (The Editors of Encyclopædia Britannica, 2014) . An example could be the relative position of the Earth to the Sun and the Moon with the effects of changes such as the transition from day to night. There are daily rhythms to many of our physiological functions and activities... our sleep, our body temperature, our alertness, our neurotransmitter levels, etc. (Chudler, 2014). Biological rhythms adjust the most important functions of an organism. There are three types of biological rhythm, the infradian rhythm, the ultradian rhythm and the circadian rhythm. Types of Biological Rhythm Circadian Circadian is a Latin word having the root “circa” meaning about and “diem” meaning a day or 24 hours, the definition is changes that occur. approximately every 24 hours (Hedge, 2013). This can be physical, mental, behavioral, etc. This type of rhythm has an endogenous meaning within, proceeding from with or from within. Some examples of circadian rhythm in plants are how they maintain the flowering response to the seasons and photosynthesis. In mammals, the circadian clock helps operate activities such as sleeping, waking, feeding, and determining whether an animal is nocturnal or diurnal. Circadian rhythms are present even in the absence of environmental cues such as light, temperature, or social cues (Victor, Biological Rhythms, 2014). Since the circadian rhythm is endogenous, this rhythm is inherited or genetic and is dominated by our biological clocks which are rested and adjusted by cyclical environmental signals called Zeitgebers. Usually their cyclic has a change in intensity and frequency at different parts...... middle of paper ... me drowsiness but without cataplexy. The different forms of narcolepsy are stimulants that doctors prescribe to keep you active during the day, antidepressants to help cure cataplexy, and finally lifestyle changes. ParasomniaThis disorder involves adverse events when falling asleep or waking up, this also includes strange movements, behaviors, emotions or dreams. and the person does not remember anything about this event. Sleepwalking, nighttime fears; Sleep talking, sleep paralysis, and eating while sleeping occur in parasomnia disorder and are some of the basic symptoms (Retini, 2014). Some risk factors are genetic, for example if a member of your family sleeps and walks, you are likely to also suffer from sleepwalking, in addition to stress, post-traumatic stress disorder, medications or drug abuse (Retini, 2014). Treatment for this disorder would include seeking help from a sleep disorder specialist..