Related Experiment Video

Updated: Aug 13, 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

[Rhythms of the digestive system and the body's biological clocks]

N N Lebedev

    Fiziologicheskii Zhurnal SSSR Imeni I. M. Sechenova
    |April 1, 1986
    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

    Manipulation of Rhythmic Food Intake in Mice Using a Custom-Made Feeding System07:34

    Manipulation of Rhythmic Food Intake in Mice Using a Custom-Made Feeding System

    Published on: December 16, 2022

    Related Concept Videos

    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...
    Sleep-Wake Cycles01:24

    Sleep-Wake Cycles

    Sleep is an essential physiological process vital to maintaining overall well-being. The reticular activating system (RAS), a network of neurons in the brainstem, regulates wakefulness and sleep. While it may seem passive, sleep consists of distinct cycles, each with its unique characteristics and functions. Two key sleep phases are non-rapid eye movement (NREM) and  rapid eye movement (REM).
    NREM Sleep
    NREM sleep comprises four progressive stages that seamlessly merge:
    Enteric Nervous System: Regulation of GI Motor Activity01:11

    Enteric Nervous System: Regulation of GI Motor Activity

    The Enteric Nervous System (ENS) plays a pivotal role in regulating gastrointestinal or GI motor activity. This complex network of nerves, deeply embedded within the gut wall, responds to changes in the gut environment and receives input from both the autonomic nervous system and the central nervous system. By doing so, the ENS operates various programs tailored to the body's nutritional status and needs.
    During periods of fasting, the ENS initiates the migrating myoelectric complex, a program...
    Gastric Motility01:16

    Gastric Motility

    Gastric motility is the coordinated contraction and relaxation of stomach muscles that convert ingested food into chyme, a semi-liquid substance ready for further digestion in the intestines. The process begins with the vagus nerve inducing the relaxation of the smooth muscles in the fundus and body of the stomach, allowing these regions to expand and accommodate up to approximately 1.5 liters of food and liquid.
    Peristaltic Waves and Chyme Formation
    Upon food entry, the stomach initiates...
    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...