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Video analysis of gross body movements during sleep |
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| Authors: | MASAYUKI SHIMOHIRA MD TOSHIHIDE SHIIKI MD JUNKO SUGIMOTO MD YUKIKO OHSAWA MD MICHIO FUKUMIZU MD TAKESHI HASEGAWA MD YOSHIHIDE IWAKAWA MD YOSHIKO NOMURA MD MASAYA SEGAWA MD |
| Affiliation: | Department of Pediatrics, Faculty of Medicine, Tokyo Medical and Dental University;Segawa Neurological Clinic for Children, Tokyo, Japan |
| Abstract: | Abstract Gross body movements (GM) during sleep, classified into four GM types by the involved parts of body, were evaluated using two-dimensional video analysis in five normal children aged 4–12 years. The rate of occurrence of all GM types showed apparent sleep stage dependency. Among four GM types, GM-1 (GM with axial rotation) was the most frequent. Averaged duration of GM-1 was the longest. A total of 77.2% of GM-1 started with the contraction of chin muscle and 35% of total sleep changes (tSC) were related to GM. A total of 5.6% of tSC following GM shifted to the deeper stage. Further evaluation is necessary in order to understand the physiological mechanism of GM. |
| Keywords: | body movement child gross movement polysomnography sleep sleep behavior video recording |