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Night-time neuronal...
Night-time neuronal activation of Cluster N in a day- and night-migrating songbird
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Zapka, Manuela (författare)
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Heyers, Dominik (författare)
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- Liedvogel, Miriam (författare)
- Lund University,Lunds universitet,Evolutionär ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,MEMEG,Evolutionary ecology,Department of Biology,Faculty of Science
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Jarvis, Erich D. (författare)
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Mouritsen, Henrik (författare)
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(creator_code:org_t)
- 2010-07-06
- 2010
- Engelska.
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Ingår i: European Journal of Neuroscience. - : Wiley. - 1460-9568 .- 0953-816X. ; 32:4, s. 619-624
- Relaterad länk:
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http://dx.doi.org/10...
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https://www.ncbi.nlm...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Magnetic compass orientation in a night-migratory songbird requires that Cluster N, a cluster of forebrain regions, is functional. Cluster N, which receives input from the eyes via the thalamofugal pathway, shows high neuronal activity in night-migrants performing magnetic compass-guided behaviour at night, whereas no activation is observed during the day, and covering up the birds' eyes strongly reduces neuronal activation. These findings suggest that Cluster N processes light-dependent magnetic compass information in night-migrating songbirds. The aim of this study was to test if Cluster N is active during daytime migration. We used behavioural molecular mapping based on ZENK activation to investigate if Cluster N is active in the meadow pipit (Anthus pratensis), a day- and night-migratory species. We found that Cluster N of meadow pipits shows high neuronal activity under dim-light at night, but not under full room-light conditions during the day. These data suggest that, in day- and night-migratory meadow pipits, the light-dependent magnetic compass, which requires an active Cluster N, may only be used during night-time, whereas another magnetosensory mechanism and/or other reference system(s), like the sun or polarized light, may be used as primary orientation cues during the day.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Neurovetenskaper (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Neurosciences (hsv//eng)
Nyckelord
- navigation
- meadow pipit
- magnetoperception
- bird migration
- magnetic sense
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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