Circadian rhythm

Hypothesis: If rats are given a source of dim nighttime light, then they'll experience depressive-like symptoms, which manifest due to neuronal changes in the hippocampus associated with circadian rhythm disruption. Independent Variable: Source of dim nighttime light Dependent Variable: Disruption in circadian rhythm Animals The test subjects of this experiment are sixty male Wistar rats [1]; they are bred and will be kept under a normal light-dark cycle. They will be kept in cages that are at a constant

an inherent clock in many species of plants, animals, and fungi, known as circadian rhythm. Circadian rhythms are used to adapt to the daily occurrences and patterns, and can affect cellular processes, hormonal changes, and behaviour. Many animals have prominent circadian adaptations that have been investigated, the honey bee (Apis mellifera) being one. Examination into the specific mechanisms of the honey bee circadian rhythm began in the 20th century. Research discovered that honey bees were able

All living organisms have a biological rhythm. Biological rhythms are patterns of physical and psychological abilities overtime. In this lab, the biological rhythm that we studied was called circadian rhythm. Circadian rhythm is a twenty-four hour cycle and it includes patterns such as body temperature, alertness, eating, and sleeping. To evaluate biological rhythms, our class measured physiological parameters such as body temperature, heart rate, time estimate, arithmetic speed, and fine movement

Describe circadian rhythms (8marks) Circadian rhythms occur every 24 hours; an example of a circadian rhythm is the sleep-waking cycle. We are diurnal animals who are active during the daytime and asleep at night, other animals are nocturnal they are active at night but asleep during the day. The circadian rhythm depends on the interaction of physiological and psychological processes to be tuned into the sleep-waking cycle so energy is provided when needed. As diurnal humans we have a fairly stable

Circadian Rhythm How does Circadian Rhythm Affect Alertness, Coordination, and Reaction Time? By Nolan Zinsser Mrs. McMahon’s 7th Grade Class of 2017-2018 Research Circadian rhythm is also called your sleep-wake cycle. It can work better when you go to bed/wake up at the same time each day. It works like a biologic clock where you know instinctively what time is lunchtime, dinnertime, or time to go to bed. It also produces more of certain chemicals at certain times of day. These chemicals can

Introduction Circadian or diurnal rhythms are metabolic or behavioural rhythms, in animals and plants, that occur usually within a 24-hour cycle (Abercrombie et al. 1990). The changes in body temperature over the course of a day (24 hours), or in the case of females, over a month, is one of the most documented human circadian rhythms. Body temperature as well as circadian rhythms in humans is controlled by the hypothalamus, a small region of the brain that forms part of the autonomic nervous

research focuses are the biology of sleep and the biology of thermoregulation. Understanding how sleep and circadian rhythms work has obvious implications for treating sleep disorders and the many health issues associated therewith, and, Heller has shown, less obvious implications for treating issues with memory, as well as diseases, such as Down syndrome, that are related to impacted circadian rhythms and memory formation and retainment. Understanding how body temperature affects body functions has practical

Increasing evidence suggests that there is highly regulated relationship between immune function, sleep, and circadian rhythms. Understanding this complex relationship is clinically relevant because desynchronization of circadian rhythms and disruptions in sleep are associated with higher likelihood of disease. It has been demonstrated that there is a bidirectional flux of circadian information between the immune and neuroendocrine system (Mavroudis, Scheff, Calvano, & Androulakis, 2012). The interactions

researchers propose that circadian rhythm dysregulation plays a role in mood disorders and reproductive hormones may modulate circadian rhythm amplitude and phase. The dramatic fluctuations in reproductive hormones that occur during pregnancy and the transition from pregnancy to postpartum occur together with alterations in diurnal melatonin timing and quantity. They hypothesize that the changes in reproductive hormones occurring during pregnancy may alter circadian rhythms and thereby precipitate

people’s beliefs. Everybody has a circadian rhythm which is a biological or psychological process that is roughly twenty-four hours long and systematically varies over the course of a day. Circadian rhythms may include a certain time of the day where your mental alertness and memory, sensitivity to pain, degree of sleepiness, and much more is at it’s peak. However, the circadian rhythm may be different for other people. An example of this is a blind person’s circadian rhythm. Many people with total blindness