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Volume 10 (1992)
- Issue 2 Pages 61-
- Issue 1 Pages 1-
Volume 10, Issue 2
Displaying 1-5 of 5 articles from this issue
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Masashi KOJIMA, Katuo YAMAZAKI, Yo MIYATA1992 Volume 10 Issue 2 Pages 61-70
Published: 1992
Released on J-STAGE: November 27, 2012
JOURNAL FREE ACCESSWe recorded EEG, EOG as well as behavioral indices and subjective sleep experience in 15 subjects to examine temporal changes of these measures and their correlations between them during the sleep onset period. A series of verbal stimuli (“One sheep” to “seven hundred sheep”) was presented during the sleep onset period. Subjects were allowed to take a nap while trying to memorize the content of verbal stimuli (the number of sheep) and pressing a button switch in their hand to each stimulus. After awakening, subjects were asked to recall the number of sheep that they had memorized. The appearance of verbal stimulus (the number of sheep) which they first failed to recall was defined as the onset of subjective sleep. The percentage of a wave (α%), the number of occurrence of slow eye movements (SEMs), the percentage of motor response (MR%) and the response time (RT) were analyzed. The results showed that a positive correlation was observed between α% and MR%, and negative correlations between MR% and RT and between α% and RT. The temporal changes of α% and MR% showed remarkable declines immediately before and after the onset of subjective sleep. These results suggest that EEG and behavioral changes concur during the sleep onset period, and they strongly correlate with the onset of subjective sleep.View full abstractDownload PDF (1429K) -
Mitsuo HAYASHI, Tadao HORI1992 Volume 10 Issue 2 Pages 71-82
Published: 1992
Released on J-STAGE: November 27, 2012
JOURNAL FREE ACCESSThe effects of 3-h nap in the early morning on performance and sleepiness during prolonged continuous works were studied. After one night sleep recording, subjects performed prolonged works for 20 hours. Following the 20 hours of works, four subjects took a 3-h nap lying in a bed (0400-0700), and the other four subjects took a 3-h rest sitting in a reclining chair. After taking a 3-h nap or rest, they performed the same works again for 12 hours. In working period, three different computer tasks were administered every 15 min. Results revealed that the early morning nap had a positive effect upon the improvement of performance and sleepiness, lasting 2 to 3 hours following the nap, and it delayed the decline in performance and the increase of sleepiness for several hours.View full abstractDownload PDF (1515K) -
Shukichi ERA, Kazunari IKEDA, Takashi MOROTOMI1992 Volume 10 Issue 2 Pages 83-90
Published: December 31, 1992
Released on J-STAGE: November 27, 2012
JOURNAL FREE ACCESSPower-spectrum analysis was performed on the a activity of 8 right-handed subjects recorded under 3 conditions : (1) rest with eyes open (REST), (2) word retrieval task (Verbal Fluency test : VF), and (3) constructional tasks (Block Design test with the right hand : RB, with the left hand : LB). These tests were employed to assess frontal lobe functionings and planning abilities. α-power values in VF significantly reduced on Fpl and C3 as compared with REST. However, no significant difference was found between REST and RB, nor between REST and LB. These results suggest that the left forebrain contributes to planning for word retrieval, and that the performance of Block Design test may require interhemispheric cooperation.View full abstractDownload PDF (908K) -
[in Japanese]1992 Volume 10 Issue 2 Pages 91-102
Published: December 31, 1992
Released on J-STAGE: November 27, 2012
JOURNAL FREE ACCESSDownload PDF (1553K) -
1992 Volume 10 Issue 2 Pages 103-130
Published: December 31, 1992
Released on J-STAGE: November 27, 2012
JOURNAL FREE ACCESSDownload PDF (3844K)
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