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  Reduced muscle contraction and a relaxed posture during sleep-like Lethargus.

Schwarz, J., Spies, J. P., & Bringmann, H. (2012). Reduced muscle contraction and a relaxed posture during sleep-like Lethargus. Worm, 1(1), 1-3. doi:10.4161/worm.19499.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-83A7-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-C64A-1
Genre: Journal Article

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1443675.pdf (Publisher version), 548KB
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Schwarz, J.1, Author              
Spies, J. P.1, Author              
Bringmann, H.1, Author              
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1Research Group of Sleep and Waking, MPI for biophysical chemistry, Max Planck Society, ou_578607              

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 Abstract: Sleep is characterized by reduced muscle activity resulting in reduced movement and a typical posture compatible with relaxed muscles. Prior to each molt, C.elegans larvae go through a phase of behavioral quiescence called Lethargus. Lethargus has sleep-like properties, but a specific posture has not yet been described. Do C.elegans larvae relax their muscles during sleep and do they assume a typical posture? We measured worm posture and body wall muscle activity using calcium imaging across the sleep-wake-like cycle. We found that worms were less curved and had less muscle activity during the sleep-like state. We conclude that during Lethargus, muscle activity is reduced, resulting in a relaxed body posture typical for a sleep-like state.

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Language(s): eng - English
 Dates: 20122012
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.4161/worm.19499
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Title: Worm
Source Genre: Journal
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Pages: - Volume / Issue: 1 (1) Sequence Number: - Start / End Page: 1 - 3 Identifier: -