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  Assessment of spontaneously occurring periodic limb movements in sleep in the rat

Baier, P., Winkelmann, J., Höhne, A., Lancel, M., & Trenkwalder, C. (2002). Assessment of spontaneously occurring periodic limb movements in sleep in the rat. Journal of the Neurological Sciences, 198(1-2), 71-77.

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Genre: Journal Article
Alternative Title : J. Neurol. Sci.

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 Creators:
Baier, PC1, Author
Winkelmann, J1, Author
Höhne, A1, Author
Lancel, M1, Author
Trenkwalder, C1, Author
Affiliations:
1Max Planck Institute of Psychiatry, Max Planck Society, ou_1607137              

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Free keywords: periodic limb movements; sleep; restless legs syndrome; aging; models; animal; rats
 Abstract: Objective: Periodic limb movements in sleep (PLMS) are often associated with the restless legs syndrome (RLS). Although the dopaminergic system seems to be involved, the pathophysiology of PLMS and RLS is still obscure. The objective of this study is to explore whether a PLMS-like phenomenon can be observed in rodents in order to elucidate the underlying mechanisms. Methods: In a group of young and old rats (1.4-1.6 and 16.2- 20.5 months, respectively), sleep-wake behavior was recorded and hindlimb movements were detected by means of a magneto- inductive device during two 12-h light periods. Furthermore, in the old rats, recordings were made after administration of the dopamine antagonist haloperidol (HAL) on three consecutive days. Periodic hindlimb movements (PHLM) during nonrapid eye movement sleep (NREM) were identified according to modified human criteria. Results: In the young animals, no PHLM were observed, whereas, 4 out of 10 old rats showed PHLM, two of them have more than 5 PHLM/h. Haloperidol affects neither the sleep pattern nor the number of PHLM. Interestingly, the percentage of old rats spontaneously displaying PHLM resembles the prevalence of PLMS in the elderly. Conclusions: Our study demonstrates for the First time that periodic hindlimb movements (PHLM) in sleep can occur spontaneously in rats. A clear effect of age on this phenomenon was seen, with only old animals displaying PHLM. To validate whether the observed PHLM constitute a good model for human PLMS or even RLS, their pharmacological properties need to be characterized in a large number of PHLM positive animals. (C) 2002 Elsevier Science B.V. All rights reserved

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Language(s): eng - English
 Dates: 2002-06-15
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 4133
ISI: 000176485300012
 Degree: -

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Title: Journal of the Neurological Sciences
  Alternative Title : J. Neurol. Sci.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 198 (1-2) Sequence Number: - Start / End Page: 71 - 77 Identifier: ISSN: 0022-510X