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A night vision brain area in migratory songbirds

Författare:
Publiceringsår: 2005
Språk: Engelska
Sidor: 8339-8344
Publikation/Tidskrift/Serie: Proceedings of the National Academy of Sciences USA
Volym: 102
Nummer: 23
Dokumenttyp: Artikel
Förlag: National Academy of Sciences

Sammanfattning

Twice each year, millions of night-migratory songbirds migrate thousands of kilometers. To find their way, they must process and integrate spatiotemporal information from a variety of cues including the Earth's magnetic field and the night-time starry sky. By using sensory-driven gene expression, we discovered that night-migratory songbirds possess a tight cluster of brain regions highly active only during night vision. This cluster, here named “cluster N,” is located at the dorsal surface of the brain and is adjacent to a known visual pathway. In contrast, neuronal activation of cluster N was not increased in nonmigratory birds during the night, and it disappeared in migrants when both eyes were covered. We suggest that in night-migratory songbirds cluster N is involved in enhanced night vision, and that it could be integrating vision-mediated magnetic and/or star compass information for night-time navigation. Our findings thus represent an anatomical and functional demonstration of a specific night-vision brain area.

Disputation

Nyckelord

  • Biology and Life Sciences
  • behavioral molecular mapping
  • bird orientation
  • cognition
  • magnetic sense
  • ZENK (zif268
  • Egr-1
  • NGF-1A
  • and Krox-24)

Övriga

Published
Yes
  • ISSN: 0027-8424 (Print)
  • ISSN: 1091-6490 (Online)

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