Night-vision brain area in migratory songbirds.
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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.
Ocular Physiological Phenomena
Published Version (Please cite this version)10.1073/pnas.0409575102
Publication InfoMouritsen, Henrik; Feenders, Gesa; Liedvogel, Miriam; Wada, Kazuhiro; & Jarvis, Erich D (2005). Night-vision brain area in migratory songbirds. Proc Natl Acad Sci U S A, 102(23). pp. 8339-8344. 10.1073/pnas.0409575102. Retrieved from https://hdl.handle.net/10161/11227.
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Adjunct Professor in the Dept. of Neurobiology
Dr. Jarvis' laboratory studies the neurobiology of vocal communication. Emphasis is placed on the molecular pathways involved in the perception and production of learned vocalizations. They use an integrative approach that combines behavioral, anatomical, electrophysiological and molecular biological techniques. The main animal model used is songbirds, one of the few vertebrate groups that evolved the ability to learn vocalizations. The generality of the discoveries is tested in other vocal