Related Experiment Video
Updated: May 11, 2026
05:46
Recording and Analysis of Circadian Rhythms in Running-wheel Activity in Rodents
Published on: January 24, 2013
Procedures for numerical analysis of circadian rhythms.
Roberto Refinetti1, Germaine Cornélissen, Franz Halberg
1Circadian Rhythm Laboratory, University of South Carolina, SC, USA.
Biological Rhythm Research
|May 28, 2013
Summary
This review covers methods for analyzing circadian rhythms across different biological levels, from populations to molecules. It details visual and mathematical techniques for time series analysis, aiding researchers in understanding biological timing.
Area of Science:
- Chronobiology
- Biological Rhythms
- Time Series Analysis
Background:
- Circadian rhythms govern physiological processes at multiple biological scales.
- Accurate analysis of these rhythms is crucial for understanding health and disease.
- Existing methodologies vary in complexity and application.
Purpose of the Study:
- To provide a comprehensive overview of analytical procedures for circadian rhythms.
- To cover methods applicable at populational, organismal, cellular, and molecular levels.
- To guide researchers in selecting appropriate analytical techniques.
Main Methods:
- Review of established and emerging analytical procedures for circadian rhythm data.
- Inclusion of visual inspection techniques (e.g., time plots, actograms).
- Detailed description of mathematical and computational methods for time series analysis.
Main Results:
- A wide spectrum of analytical methods is available for circadian rhythm research.
- Both qualitative (visual) and quantitative (mathematical) approaches are presented.
- Computational aspects and practical resources are detailed.
Conclusions:
- Effective analysis of circadian rhythms requires careful selection of appropriate methods.
- This review serves as a resource for researchers across various disciplines.
- Understanding these analytical procedures enhances the study of biological timing mechanisms.
Related Concept Videos
02:19Circadian 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,...
02:19Circadian 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,...
01:15Chronopharmacokinetics: 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...
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...
02:45Biological 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.