Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Azimuths and Bearings01:19

Azimuths and Bearings

773
Azimuths and bearings are essential concepts in surveying, providing methods to express the direction of a line relative to a meridian. Azimuths refer to the clockwise angle measured from the north end of a reference meridian to the given line, ranging from zero to 360 degrees. This method gives a comprehensive directional reference within a full 360-degree circle, making it a straightforward way to communicate direction in various fields, including navigation, cartography, and...
773
Convergent Evolution01:54

Convergent Evolution

33.6K
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
33.6K
Compass01:23

Compass

10.3K
The compass is a fundamental instrument that operates by aligning its magnetic needle with Earth's magnetic field. This alignment facilitates navigation and orientation, offering a means to determine direction relative to magnetic north. However, the magnetic needle points to magnetic north, which differs slightly from true geographic north due to magnetic declination, which is the angular deviation between these two points. Declination varies based on geographic location and shifts over time...
10.3K
Diencephalon: Anatomical Regions01:30

Diencephalon: Anatomical Regions

6.0K
The diencephalon, etymologically translated as 'through brain,' plays an integral role as the conduit between the cerebrum and the vast extent of the nervous system. However, the olfactory system is an exception, as it interfaces directly with the cerebrum. The diencephalon, deeply ensconced beneath the cerebrum, primarily consists of three paired structures — the thalamus, hypothalamus, and epithelamus. It also includes accessory structures such as the subthalamus, which houses the...
6.0K
Anatomy of the Eyeball01:20

Anatomy of the Eyeball

10.3K
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle...
10.3K
Osmoregulation in Insects01:47

Osmoregulation in Insects

17.7K
Malpighian tubules are specialized structures found in the digestive systems of many arthropods, including most insects, that handle excretion and osmoregulation. The tubules are typically arranged in pairs and have a convoluted structure that increases their surface area.
17.7K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

The interplay between gut microbiota and Alzheimer's disease: mechanistic insights from dysbiosis to disease modulation.

Metabolic brain disease·2026
Same author

On the Low Abundance of Antibiotic Resistance Genes in Bacteriophage Genomes and Their Random Acquisition via Specialized Transduction.

Genome biology and evolution·2026
Same author

III-nitride nanowire heterostructure: an emerging solution for next generation all-color solid state light sources.

Nanotechnology·2026
Same author

Ultrafast Modulation of Optically Driven GHz-THz Coherent Acoustic Phonons in an AlGaN/GaN HEMT Heterostructure under High Excitation Density.

ACS applied materials & interfaces·2026
Same author

Gut-skin microbial interactions in wound healing: From mechanistic insights to therapeutic opportunities.

Tissue & cell·2026
Same author

Network pharmacology study and preclinical validation highlight the anti-diabetic potential of Persicaria lapathifolia (L.) Delarbre leaf extract via AMPK/Akt pathways.

Bioorganic chemistry·2026

Related Experiment Video

Updated: Feb 28, 2026

Evaluation of Auditory Brainstem Response in Chicken Hatchlings
09:32

Evaluation of Auditory Brainstem Response in Chicken Hatchlings

Published on: April 1, 2022

3.6K

Functional window of the avian compass.

Vishvendra Singh Poonia1, Kiran Kondabagil2, Dipankar Saha1

  • 1Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai 400076, India.

Physical Review. E
|June 17, 2017
PubMed
Summary

The radical-pair model explains the avian compass's functional window and sensitivity to radio frequencies. However, the simple model cannot quantitatively explain the window's width, suggesting a need for further development.

More Related Videos

Selective Tracing of Auditory Fibers in the Avian Embryonic Vestibulocochlear Nerve
11:27

Selective Tracing of Auditory Fibers in the Avian Embryonic Vestibulocochlear Nerve

Published on: March 18, 2013

9.6K
Windowing Chicken Eggs for Developmental Studies
15:01

Windowing Chicken Eggs for Developmental Studies

Published on: October 1, 2007

28.9K

Related Experiment Videos

Last Updated: Feb 28, 2026

Evaluation of Auditory Brainstem Response in Chicken Hatchlings
09:32

Evaluation of Auditory Brainstem Response in Chicken Hatchlings

Published on: April 1, 2022

3.6K
Selective Tracing of Auditory Fibers in the Avian Embryonic Vestibulocochlear Nerve
11:27

Selective Tracing of Auditory Fibers in the Avian Embryonic Vestibulocochlear Nerve

Published on: March 18, 2013

9.6K
Windowing Chicken Eggs for Developmental Studies
15:01

Windowing Chicken Eggs for Developmental Studies

Published on: October 1, 2007

28.9K

Area of Science:

  • Biophysics
  • Animal Navigation
  • Quantum Biology

Background:

  • The avian compass exhibits a 'functional window,' a selectivity based on geomagnetic field strength.
  • Understanding this compass mechanism is crucial for comprehending avian navigation.

Purpose of the Study:

  • To evaluate the radical-pair model's ability to explain the avian compass's functional window.
  • To investigate the model's consistency with behavioral experiments, including radio-frequency disruption.
  • To explore potential adaptations and biological purposes of the functional window.

Main Methods:

  • Utilized the radical-pair model with biologically feasible hyperfine parameters.
  • Analyzed the model's qualitative and quantitative agreement with experimental data on avian compass behavior.
  • Simulated the effects of radio-frequency fields on the compass mechanism.

Main Results:

  • The radical-pair model qualitatively explains the functional window and radio-frequency disruption.
  • Adjusting hyperfine parameters suggests a mechanism for adapting the functional window to field variations.
  • The simplest radical-pair model forms do not quantitatively explain the observed functional window width.

Conclusions:

  • The radical-pair model provides a foundational explanation for avian magnetoreception but requires further generalization.
  • The functional window may be an emergent property rather than a directly selected trait.
  • Future research should explore more complex models involving additional nuclei or environmental interactions.