Document Detail

Magnetoreception in an avian brain in part mediated by inner ear lagena.
MedLine Citation:
PMID:  21353559     Owner:  NLM     Status:  MEDLINE    
Many animals use the Earth's geomagnetic field for orientation and navigation, but the neural mechanisms underlying that ability remain enigmatic. Support for at least two avian magnetoreceptors exists, including magnetically activated photochemicals in the retina and ferrimagnetic particles in the beak. The possibility of a third magnetoreceptor in the inner ear lagena organs has been suggested. The brain must process magnetic receptor information to derive constructs representing directional heading and geosurface location. Here, we used the c-Fos transcription factor, a marker for activated neurons, to discover where in the brain computations related to a specific set of magnetic field stimulations occur. We found that neural activations in discrete brain loci known to be involved in orientation, spatial memory, and navigation may constitute a major magnetoreception pathway in birds. We also found, through ablation studies, that much of the observed pathway appears to receive magnetic information from the pigeon lagena receptor organs.
Le-Qing Wu; J David Dickman
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2011-02-25
Journal Detail:
Title:  Current biology : CB     Volume:  21     ISSN:  1879-0445     ISO Abbreviation:  Curr. Biol.     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-03-07     Completed Date:  2011-07-12     Revised Date:  2014-09-13    
Medline Journal Info:
Nlm Unique ID:  9107782     Medline TA:  Curr Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  418-23     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier Ltd. All rights reserved.
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MeSH Terms
Afferent Pathways / physiology
Brain / physiology*
Columbidae / physiology*
Ear, Inner / physiology*
Orientation / physiology*
Perception / physiology*
Proto-Oncogene Proteins c-fos / metabolism
Grant Support
Reg. No./Substance:
0/Proto-Oncogene Proteins c-fos

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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