Correlation between K complex, periodic leg movements (PLM), and myoclonus during sleep in paraplegic adults before and after an acute physical activity

Correlation between K complex, periodic leg movements (PLM), and myoclonus during sleep in paraplegic adults before and after an acute physical activity

Author Mello, Marco Tulio de Autor UNIFESP Google Scholar
Silva, Antônio Carlos Autor UNIFESP Google Scholar
Rueda, A. D. Google Scholar
Poyares, Dalva Autor UNIFESP Google Scholar
Tufik, Sergio Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Abstract K complex is the characteristic wave of stage II of sleep. the relationship between periodic limb movements (PLM) and the restless legs syndrome (RLS), and the incidence of K complexes and alpha activity has been previously described. the aim of the present study was to evaluate the effect of an acute physical activity upon K complex, PLM, and myoclonus during sleep in individuals who were paraplegic. We evaluated 84 polysomnograms from 28 volunteers with a spinal cord injury at the level of T7-T12, obtained during three consecutive nights. On day 3, the volunteers were submitted to a test of maximum effort (manual cycloergometer, with the equipment Cybex Met 300, with a progressive load increase of 12.5 w, every 2 min). the analysis of the polysomnographic recordings showed a positive correlation between the incidence of K complex and limb movements on nights 1, 2 and 3. Similarly, a correlation between the incidence of K complex and myoclonus was observed on nights 1, 2 and 3. An increased incidence of the total K complex was seen on night 3, 36 h after the test of maximum effort. Both total K complex and K complex/h were reduced on night 2, compared to basal recording (night 1). There was a reduction of sleep latency on night 2, whereas total sleeping time increased progressively on night 3, as well as REM phase on nights 2 and 3. These findings indicate that physical activity can affect or modulate the incidence of K complex and suggest that a positive correlation between PLM and K complex may occur in those who are paraplegic from a spinal cord injury. in conclusion, sleep can be consolidated after physical activity.
Keywords sleep
K complex
periodic leg movements
myoclonus paraplegic
physical activity
Language English
Date 1997-04-01
Published in Spinal Cord. Basingstoke: Stockton Press, v. 35, n. 4, p. 248-252, 1997.
ISSN 1362-4393 (Sherpa/Romeo, impact factor)
Publisher Stockton Press
Extent 248-252
Origin http://dx.doi.org/10.1038/sj.sc.3100408
Access rights Open access Open Access
Type Article
Web of Science ID WOS:A1997WR95300011
URI http://repositorio.unifesp.br/handle/11600/25707

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