Navigation Links
Do migratory birds 'see' the magnetic field?
Date:9/25/2007

Cryptochromes, which fulfill the molecular requirements for sensing the magnetic reference direction, have recently been found in retinal neurons of migratory birds (Mouritsen et al., PNAS, 2004). Furthermore, studies investigating what parts of a migratory birds brain are active when the birds use their magnetic compass showed that the cryptochrome-containing neurons in the eye and a forebrain region (Cluster N; Mouritsen et al., PNAS, 2005; Liedvogel et al., EJN, 2007) are highly active during processing of magnetic compass information in migratory birds. Sensory systems process their particular stimuli along specific brain circuits. Thus, the identification of what sensory system is active during magnetic compass orientation, provides a way to recognize the sensory quality utilized during that specific behavior.

In the current study the research group from Oldenburg, Germany and their collaborators traced the neurons from the eye and from Cluster N. The results link the recent findings by demonstrating a functional neuronal connection between the retinal neurons and Cluster N via the visual thalamus.

Thus, the only two parts of the central nervous system shown to be highly active during magnetic compass orientation are linked to each other by a well-known visual brain circuit, namely by parts of the so-called thalamofugal pathway. For the first time, clear neuroanatomical data suggest which specific brain pathway processes magnetic compass information in migratory birds. These findings strongly support the hypothesis that migratory birds use their visual system to perceive the reference compass direction of the geomagnetic field and that migratory birds are thus likely to "see" the geomagnetic field.


'/>"/>

Contact: Dominik Heyers
dominik.heyers@uni-oldenburg.de
Public Library of Science
Source:Eurekalert

Page: 1

Related biology news :

1. In the migratory marathon, parasitized monarchs drop out early
2. Migratory songbirds have a specialized night-vision brain area
3. How satellite tracking revealed the migratory mysteries of endangered Atlantic loggerhead turtles
4. Light guides flight of migratory birds
5. Birds brains reveal source of songs
6. The lopsided brain: Attention bias is shared by humans and birds
7. Bobbing birds do it for a reason
8. Mother birds increase progesterone to hatch females
9. Overbearing colored light may reveal a second mechanism by which birds interpret magnetic signals
10. Industrial contaminants spread by seabirds in High Arctic, new Canadian study shows
11. Birds and bats sow tropical seeds
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/11/2017)... , April 11, 2017 No ... but researchers at the New York University Tandon ... of Engineering have found that partial similarities between ... systems used in mobile phones and other electronic ... The vulnerability lies in the fact ...
(Date:4/5/2017)... LONDON , April 4, 2017 KEY ... is anticipated to expand at a CAGR of 25.76% ... neurodegenerative diseases is the primary factor for the growth ... full report: https://www.reportbuyer.com/product/4807905/ MARKET INSIGHTS The ... of product, technology, application, and geography. The stem cell ...
(Date:3/30/2017)... YORK , March 30, 2017 Trends, ... type (physiological and behavioral), by technology (fingerprint, AFIS, iris ... voice recognition, and others), by end use industry (government ... and immigration, financial and banking, and others), and by ... Europe , Asia Pacific , ...
Breaking Biology News(10 mins):
(Date:5/23/2017)... ... May 23, 2017 , ... ... cardiovascular cells for research and the development of cardiac regeneration therapies. The ... large numbers of cardiomyocytes (hPSC-CMs). Due to varying differentiation efficiencies, further enrichment ...
(Date:5/23/2017)... CA (PRWEB) , ... May 23, 2017 , ... ... publication of “Label-free isolation of prostate circulating tumor cells using Vortex microfluidic technology ... the result of a collaboration with Dr. Dino Di Carlo and Dr. Matthew Rettig ...
(Date:5/23/2017)... ... May 23, 2017 , ... Cambridge Semantics , ... at this year’s Bio-IT World Conference and Expo in Boston May 23-25 ... 4.0 solution. The Anzo Smart Data Lake is also a finalist for the ...
(Date:5/22/2017)... ... May 22, 2017 , ... Cancer diagnostics and pathology ... B2 at the Association for Pathology Informatics Annual Summit at the ... demonstrating its Cancer Diagnostic Cockpit and Consultation Portal, Inspirata will present research it ...
Breaking Biology Technology: