Time trends and periodic cycles in rem sleep eye movements

Krynicki, Victor

doi:10.1016/0013-4694(75)90052-8

Cited by 17 publications

(10 citation statements)

References 9 publications

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“…This has previously been reported to be the case in normals (7). The relative preponderance of the different types of trend does not appear remark ably different between retardates and normals; further, the relative preponder ance of the different trends is quite similar in functionals and in mongoloids.…”

Section: Discussionsupporting

confidence: 57%

“…Turning to the orthogonal spectral analysis results, and comparing these with those of a previous report on normals (7), it can be seen that the periodic organization of REM eye movements in functional retardates is quite similar to that of normals. In functionals, the majority of activity consistently occurred at 10.6 or 21.3 min.…”

Section: Discussionmentioning

confidence: 82%

“…Thus, a different organization of eye movements in shorter REM periods may be indicated in mongoloid subjects. However, it should be noted that Krynicki (7) found that activity at 21.3 or 10.6 min was not pre ponderant in the 21.7-29.7 min class in normal subjects. Thus, the finding in mongoloids outlined above cannot be strongly interpreted.…”

Section: Discussionmentioning

confidence: 99%

“…It has been found that eye move ment activity during a REM period progressively increases to a peak value around the middle of the period and then decreases (12). In a study more precisely quantifying this observation, time trends were examined via polyno mial regressions (7). This study found no temporal trend in approximately onethird of the REM periods studied.…”

mentioning

confidence: 93%

“…The details of the method of eye movement analysis have been presented in a previous paper (7). Briefly, relatively rapid out-of-phase deflections of at least 25 pV in (he two EOG channels during REM sleep were scored as eye movements.…”

Section: Methodsmentioning

confidence: 99%

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The Temporal and Periodic Organization of REM Eye Movements in Mental Retardation

Krynicki¹

1976

Neuropsychobiology

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Time trends and periodic cycles in REM sleep eye movements were examined in 6 functional and 6 mongoloid adolescent retardates. Both groups of subjects showed approximately equal percentages of linear trends, quadratic trends, linear and quadratic trends, and absence of trend. The eye movement time-series were subject to an orthogonal spectral analysis. In both groups of subjects, peak spectral estimates generally occurred at 10.6- or 21.3-min periods. Following this, the eye movements of the longest REM periods (and one long period of pre-sleep wakefulness) were subject to a least-squares spectral analysis. This analysis yielded estimates ranging from 22 to 44 min. Eye movements lacked the ultradian organization previously reported for eye movements of normal subjects. These results imply that the ultradian organization of REM sleep and the ultradian organization of eye movements may be independent.

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Section: Discussionsupporting

confidence: 57%

Section: Discussionmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 93%

Section: Methodsmentioning

confidence: 99%

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