共查询到13条相似文献,搜索用时 15 毫秒
1.
Effects of short duration morning bright light in healthy elderly. II:Sleep and motor activity 总被引:1,自引:1,他引:0
MASAKO KOHSAKA NORIKO FUKUDA RIKO KOBAYASHI HIROSHI HONMA SATOSHI SAKAKIBARA EMI KOYAMA OSHIO NAKANO HOZUMI MATSUBARA 《Psychiatry and clinical neurosciences》1998,52(2):252-253
Abstract Subjective sleep feelings and motor activity were measured in seven healthy elderly subjects for 6 days. The subjects were exposed to bright light (6000 lux) for 30 min in the morning or instructed to sit in front of a desktop lighting device without light. The average level of motor activity during the night was significantly decreased in the bright light condition, compared with the controlled condition. However, daytime motor activity did not show significant differences between the two conditions. From these findings, even a short duration of morning bright light is effective in maintaining sleep without changing daytime activity. 相似文献
2.
Riko Kobayashi MD Masako Kohsaka MD Noriko Fukuda P hD Satoshi Sakakibara MD Hiroshi Honma MD & Tsukasa Koyama MD 《Psychiatry and clinical neurosciences》1999,53(2):237-238
Subjective sleep feeling and polysomnography were measured in 10 elderly women to investigate the effects of 8000 lux morning bright light (BL) exposure. The profile of sleep feeling in the BL condition was better than in the control condition. The proportion of awakening time in the first one-third of night sleep decreased, and the amount of awakening time in the last one-third increased in BL condition. Daytime napping reduced in BL condition. These findings suggested the effectiveness of exposure to bright light on the improvement of sleep quality and daytime vigilance of healthy elderly women. 相似文献
3.
Kohsaka M Fukuda N Kobayashi R Honma H Sakakibara S Koyama E Nakano T Matsubara H 《Psychiatry and clinical neurosciences》2000,54(3):367-368
Sleep structure was measured in five healthy elderly men in their homes. The subjects were exposed to bright light (6000 lx) for 30 min in the morning or instructed to sit in front of a desktop lighting device without light. Relative to the control conditions, bright light exposure significantly decreased time in bed and the number of awakenings. Rapid eye movement sleep was significantly fragmented by stage 1 sleep in the control condition compared with the bright light condition. These findings indicate that a short duration of morning bright light changes sleep structure and is effective in maintaining sleep. 相似文献
4.
Satoshi Sakakibara Masako Kohsaka Riko Kobayashi Hiroshi Honma Noriko Fukuda & Tsukasa Koyama 《Psychiatry and clinical neurosciences》1999,53(2):235-236
To investigate the effects of 8000 lux morning bright light in the elderly, home-based motor activity on sleep was monitored for 5 days in 10 healthy women (mean age: 59.7 years old, range: 50-69 years old). The activity level and movement index on night 4 were significantly lower in bright light conditions, compared with the controlled condition. The activity level during the day was not significantly different between the two conditions. These results indicate that 8000 lux morning bright light improves sleep quality in healthy elderly women. 相似文献
5.
Masako Kohsaka Noriko Fukuda Hiroshi Honma Riko Kobayashi Satoshi Sakakibara Emi Koyama Toshio Nakano & Hozumi Matsubara 《Psychiatry and clinical neurosciences》1999,53(2):239-241
Eight healthy elderly women aged 56-72 years (mean age: 67.4 years) participated in this study. They were exposed to moderately bright light (1000 lux) for 1h in the morning every 6 days in their homes. Moderately bright light improved self evaluations for alertness, mood, motivation, happiness, refreshment, concentration and appetite after the second exposure to the light. Sleep maintenance, anxiety and integrated sleep feeling also improved after the fourth exposure to the light. The phase of rectal temperature rhythm did not change in a moderately bright light condition. These results suggest that bright light influences sleep quality and self evaluations without changing the biological rhythm phase. 相似文献
6.
OBJECTIVE: To compare the efficacy of 20 min versus 45 min light exposure for relieving psychophysiological insomnia in the elderly. METHODS: Prospective recruitment of subjects 60 years and older with psychophysiological insomnia. Random distribution to 20 or 45 min of daily exposure to 10,000 lux for 60 days. Sleep latency, total sleep time, fatigue and activity were measured at baseline and 3 and 6 months posttreatment. Blind analysis of data and comparison were performed using repeated-measure analysis of variance, independent samples t test and Wilcoxon rank signed test. RESULTS: At 3 months, improvement was significantly higher in the 45-min versus 20-min condition. At 6 months, variables returned toward baseline in the 20-min but not in the 45-min condition. CONCLUSIONS: Twenty minutes of bright light treatment leads to a lesser treatment response than 45 min at 3-month follow-up and to a return toward baseline at 6-month follow-up that was not seen with a 45-min exposure. 相似文献
7.
Effects of bright light at lunchtime on sleep of patients in a geriatric hospital I. 总被引:1,自引:0,他引:1
R Kobayashi N Fukuda M Kohsaka Y Sasamoto S Sakakibara E Koyama F Nakamura T Koyama 《Psychiatry and clinical neurosciences》2001,55(3):287-289
The effects of lunchtime bright light exposure in patients of a geriatric hospital were investigated. Ten inpatients (six women and four men; mean age +/- SD: 81.2 +/- 8.8 years) with sleep disturbances were studied for 9 weeks. Nurses performed daily ratings for sleep-wakefulness disturbances. Approximately 8000 lx bright light exposure was performed for 3 weeks in the light therapy room. Before and after exposure, ocular function was evaluated. Clinical ratings of sleep-wakefulness improved in eight patients. The score of difficulty in falling asleep and drowsiness in the morning declined during the light exposure. The score of drowsiness in the afternoon decreased during the post-light exposure. Post-exposure ocular disturbances were not found. 相似文献
8.
M Kohsaka S Kohsaka N Fukuda H Honma S Sakakibara I Kawai T Miyamoto R Kobayashi 《Psychiatry and clinical neurosciences》2001,55(3):283-284
To investigate the effects of evening bright light on the autonomic nervous system, heart rate variability (HRV) during sleep was analyzed in dim light (DL) and bright light (BL) conditions. We recorded polysomnography in nine healthy young women aged 20-21 years. Time series of % delta power was calculated in the 0.49-2.20 Hz band. Heart rate variability was analyzed from a 10-min segment of slow wave sleep. The low- to high-frequency ratio and the low-frequency component decreased significantly in the BL conditions compared with the DL conditions. However, the power of the high-frequency component did not change in the two conditions. These results indicate that evening BL affects the autonomic nervous system during slow wave sleep. 相似文献
9.
Effects of bright light on cognitive and sleep-wake (circadian) rhythm disturbances in Alzheimer-type dementia 总被引:2,自引:0,他引:2
Yamadera H Ito T Suzuki H Asayama K Ito R Endo S 《Psychiatry and clinical neurosciences》2000,54(3):352-353
Twenty-seven patients with Alzheimer-type dementia (ATD) were treated with bright light therapy in the morning for four consecutive weeks. The cognitive state of each patient was evaluated with the Mini-Mental-State Examination (MMSE) and circadian rhythm with actigram before and after therapy for all of the patients and those of two groups divided by the severity criteria of the Clinical Dementia Rating. The therapy improved the circadian rhythm disturbances. Although the therapy caused no remarkable effects on dementia severity, it improved the MMSE scores, especially in the early stages of ATD. These results suggest that bright light therapy improved the circadian rhythm disturbances and then bettered the cognitive state in early-stage ATD. 相似文献
10.
T Ito H Yamadera R Ito H Suzuki K Asayama S Endo 《Psychiatry and clinical neurosciences》2001,55(3):281-282
The present study investigated the effects of vitamin B12 (VB12) on circadian rhythm in Alzheimer-type dementia (ATD). Twenty-eight ATD patients were treated with bright light therapy (BLT) for 8 weeks. For the latter 4 weeks, half were treated with VB12 with BLT (BLT + VB12). We evaluated the cognitive state with Mini-Mental State Examination and the circadian rhythm with actigraphy after the fourth and eighth week. After the first 4 weeks BLT improved the circadian rhythm disturbances and cognitive state especially in the early stage of ATD. Although the latter 4 week-BLT caused no significant effects on the circadian rhythm; BLT + VB12 improved the vigilance level during the daytime. These results suggest that VB12 has some efficiency to enhance vigilance for ATD patients. 相似文献
11.
Bright light is used to treat winter depression and might also have positive effects on mood in some healthy individuals. We examined possible links between bright light exposure and social interaction using naturalistic data. For 20 days in winter and/or summer, 48 mildly seasonal healthy individuals wore a light meter at the wrist and recorded in real-time their behaviours, mood, and perceptions of others during social interactions. Possible short-term effects of bright light were examined using the number of minutes, within any given morning, afternoon or evening, that people were exposed to light exceeding 1000 lux (average: 19.6min). Social interactions were labelled as having occurred under conditions of no, low or high bright light exposure. Independent of season, day, time, and location, participants reported less quarrelsome behaviours, more agreeable behaviours and better mood when exposed to high but not low levels of bright light. Given that the effects were seen only when exposure levels were above average, a minimum level of bright light may be necessary for its positive effects to occur. Daily exposure levels were generally low in both winter and summer. Spending more time outdoors and improving indoor lighting may help optimize everyday social behaviour and mood across seasons in people with mild seasonality. 相似文献
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13.
M Tsunoda T Endo S Hashimoto S Honma K I Honma 《Psychiatry and clinical neurosciences》2001,55(3):285-286
Effects of light intensity and sleep stages on heart rate variability (HRV) were investigated in young healthy subjects. The low-frequency (LF)/high-frequency (HF) ratio was significantly increased by exposing either to bright lights of 10 000 lx or to extreme darkness (< 0.01 lx), while HF and LF components of HRV were not changed, when compared with those under dim light (100 lx). However, LF was significantly increased at REM sleep, when compared with that at the pre-sleep wake. In contrast, HF was increased at all stages of sleep, and the LF/HF ratio was decreased at slow wave sleep during the baseline night. 相似文献