Please use this identifier to cite or link to this item: http://repositorio.unifesp.br/handle/11600/25707
Title: Correlation between K complex, periodic leg movements (PLM), and myoclonus during sleep in paraplegic adults before and after an acute physical activity
Authors: Mello, Marco Tulio de [UNIFESP]
Silva, Antônio Carlos [UNIFESP]
Rueda, A. D.
Poyares, Dalva [UNIFESP]
Tufik, Sergio [UNIFESP]
Universidade Federal de São Paulo (UNIFESP)
Keywords: sleep
K complex
periodic leg movements
myoclonus paraplegic
physical activity
Issue Date: 1-Apr-1997
Publisher: Stockton Press
Citation: Spinal Cord. Basingstoke: Stockton Press, v. 35, n. 4, p. 248-252, 1997.
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.
URI: http://repositorio.unifesp.br/handle/11600/25707
ISSN: 1362-4393
Other Identifiers: http://dx.doi.org/10.1038/sj.sc.3100408
Appears in Collections:Em verificação - Geral

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