Precise measurement of individual rapid eye movements in REM sleep of humans.
Sleep
; 20(9): 743-52, 1997 Sep.
Article
em En
| MEDLINE
| ID: mdl-9406327
ABSTRACT
An automated analyzer for individual eye movements (EMs) has been developed that enables precise analyses of their incidence. Three new parameters for each EM are obtained EM magnitude, the angle and speed of eyeball rotation, and the energy of each EM. All rapid eye movement (REM) sleep EMs from 40 nights of polysomnography for 20 healthy young men were analyzed. The mean frequency of eye movement (EM frequency) was 15.9 per minute. Compared to conventionally analyzed rapid eye movement (REM) density, EM frequency was more sensitive to differences among sleep cycles, nights, and individuals. The mean EM rotation was 6.27 +/- 0.021 degrees, the mean speed of rotation was 58.73 +/- 0.18 degrees/second, and mean energy was 525.85 +/- 3.82 degrees2/second. The distribution of changes in these new parameters differed from conventional measures across REM episodes. The conventional measures, REM episode duration, and REM density increased progressively in successive REM episodes in an ascent-to-right pattern. However, the new parameters peaked in the second, followed by relatively low values, producing an inverted V pattern. This discrepancy could indicate physiological mechanisms of EM that are not revealed in conventional measures of REM sleep intensity.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Sono REM
/
Polissonografia
Limite:
Adult
/
Humans
/
Male
Idioma:
En
Revista:
Sleep
Ano de publicação:
1997
Tipo de documento:
Article
País de afiliação:
Japão