Related Experiment Video

Updated: Aug 16, 2026

Recording and Analysis of Circadian Rhythms in Running-wheel Activity in Rodents
05:46

Recording and Analysis of Circadian Rhythms in Running-wheel Activity in Rodents

Published on: January 24, 2013

[Constancy of the circadian system of the body]

S I Stepanov

    Kosmicheskaia Biologiia I Aviakosmicheskaia Meditsina
    |November 1, 1978
    PubMed

    More Related Videos

    Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures06:53

    Parallel Measurement of Circadian Clock Gene Expression and Hormone Secretion in Human Primary Cell Cultures

    Published on: November 11, 2016

    Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments08:36

    Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments

    Published on: August 8, 2019

    Related Concept Videos

    Biological Clocks and Seasonal Responses02:45

    Biological Clocks and Seasonal Responses

    The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
    Circadian Rhythms and Gene Regulation02:19

    Circadian Rhythms and Gene Regulation

    The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent years,...
    Circadian Rhythms and Gene Regulation02:19

    Circadian Rhythms and Gene Regulation

    The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent years,...
    Functional Brain Systems: Reticular Formation01:13

    Functional Brain Systems: Reticular Formation

    The reticular formation is a complex network of gray and white matter located within the brainstem extending from the medulla to the midbrain.
    Within the reticular formation, there are several distinct nuclei that can be classified into three broad categories. The Raphe nuclei are located along the midline of the brainstem. They are primarily known for their role in synthesizing and releasing serotonin, a neurotransmitter involved in regulating mood, appetite, sleep, and circadian rhythms. The...
    Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response01:15

    Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response

    Circadian rhythms are cyclic changes that are crucial in plasma drug concentrations. Various standard circadian parameters, including core body temperature, heart rate, and other cardiovascular factors, directly impact disease states and the therapeutic response to drug therapy.
    The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
    Perceptual Constancy01:12

    Perceptual Constancy

    Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
    Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...