Shigekazu Higuchi

Summary

Affiliation: Akita University School of Medicine
Country: Japan

Publications

  1. ncbi request reprint Diurnal variation in the P300 component of human cognitive event-related potential
    S Higuchi
    Department of Public Health, Akita University School of Medicine, Akita City, Japan
    Chronobiol Int 17:669-78. 2000
  2. ncbi request reprint Diurnal variations in alpha power density and subjective sleepiness while performing repeated vigilance tasks
    S Higuchi
    Department of Public Health, Akita University School of Medicine, 1 1 1 Hondo, 010 8543, Akita City, Japan
    Clin Neurophysiol 112:997-1000. 2001
  3. ncbi request reprint Relationship between individual difference in melatonin suppression by light and habitual bedtime
    Shigekazu Higuchi
    Department of Public Health, Akita University School of Medicine, Akita, Japan
    J Physiol Anthropol Appl Human Sci 24:419-23. 2005
  4. ncbi request reprint Effects of playing a computer game using a bright display on presleep physiological variables, sleep latency, slow wave sleep and REM sleep
    Shigekazu Higuchi
    Department of Public Health, Akita University School of Medicine, Akita, Japan
    J Sleep Res 14:267-73. 2005
  5. ncbi request reprint Effects of VDT tasks with a bright display at night on melatonin, core temperature, heart rate, and sleepiness
    Shigekazu Higuchi
    Department of Public Health, Akita University School of Medicine, Akita 010 8543, Japan
    J Appl Physiol 94:1773-6. 2003
  6. ncbi request reprint Less exposure to daily ambient light in winter increases sensitivity of melatonin to light suppression
    Shigekazu Higuchi
    Department of Public Health, Akita University School of Medicine, Akita, Japan
    Chronobiol Int 24:31-43. 2007
  7. ncbi request reprint Influence of eye colors of Caucasians and Asians on suppression of melatonin secretion by light
    Shigekazu Higuchi
    Department of Public Health, Akita University School of Medicine, Akita, Japan
    Am J Physiol Regul Integr Comp Physiol 292:R2352-6. 2007
  8. doi request reprint Inter-individual difference in pupil size correlates to suppression of melatonin by exposure to light
    Shigekazu Higuchi
    Department of Psychophysiology, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan
    Neurosci Lett 440:23-6. 2008
  9. ncbi request reprint Error and individual difference in cardiovascular responses to orthostatic stress in humans
    Keita Ishibashi
    Department of Physiological Anthropology, Faculty of Design, Kyushu University, Fukuoka, Japan
    J Physiol Anthropol Appl Human Sci 24:339-43. 2005
  10. doi request reprint Work schedule differences in sleep problems of nursing home caregivers
    Masaya Takahashi
    National Institute of Occupational Safety and Health, 6 21 1, Nagao, Tama ku, Kawasaki 214 8585, Japan
    Appl Ergon 39:597-604. 2008

Detail Information

Publications11

  1. ncbi request reprint Diurnal variation in the P300 component of human cognitive event-related potential
    S Higuchi
    Department of Public Health, Akita University School of Medicine, Akita City, Japan
    Chronobiol Int 17:669-78. 2000
    ..The P300 latency was correlated positively with subjectively rated sleepiness and negatively correlated with subjectively rated attention level. These results suggest the existence of diurnal variation in human cognitive functions...
  2. ncbi request reprint Diurnal variations in alpha power density and subjective sleepiness while performing repeated vigilance tasks
    S Higuchi
    Department of Public Health, Akita University School of Medicine, 1 1 1 Hondo, 010 8543, Akita City, Japan
    Clin Neurophysiol 112:997-1000. 2001
    ..Diurnal variations in EEG activity and subjectively rated sleepiness while performing repeated vigilance tasks were examined...
  3. ncbi request reprint Relationship between individual difference in melatonin suppression by light and habitual bedtime
    Shigekazu Higuchi
    Department of Public Health, Akita University School of Medicine, Akita, Japan
    J Physiol Anthropol Appl Human Sci 24:419-23. 2005
    ..These results suggest that there are some people with very low sensitivity to light and that this may affect habitual bedtime...
  4. ncbi request reprint Effects of playing a computer game using a bright display on presleep physiological variables, sleep latency, slow wave sleep and REM sleep
    Shigekazu Higuchi
    Department of Public Health, Akita University School of Medicine, Akita, Japan
    J Sleep Res 14:267-73. 2005
    ..These results suggest that playing an exciting computer game affects sleep latency and REM sleep but that a bright display does not affect sleep variables...
  5. ncbi request reprint Effects of VDT tasks with a bright display at night on melatonin, core temperature, heart rate, and sleepiness
    Shigekazu Higuchi
    Department of Public Health, Akita University School of Medicine, Akita 010 8543, Japan
    J Appl Physiol 94:1773-6. 2003
    ..The results suggest that performing an exciting VDT task with a BD suppresses the nocturnal changes in melatonin concentration and other physiological indicators of human biological clocks...
  6. ncbi request reprint Less exposure to daily ambient light in winter increases sensitivity of melatonin to light suppression
    Shigekazu Higuchi
    Department of Public Health, Akita University School of Medicine, Akita, Japan
    Chronobiol Int 24:31-43. 2007
    ..The results suggest that the increase in suppression of melatonin by light in winter is caused by less exposure to daily ambient light...
  7. ncbi request reprint Influence of eye colors of Caucasians and Asians on suppression of melatonin secretion by light
    Shigekazu Higuchi
    Department of Public Health, Akita University School of Medicine, Akita, Japan
    Am J Physiol Regul Integr Comp Physiol 292:R2352-6. 2007
    ..01). No significant difference was found between pupil sizes in light-eyed Caucasians and dark-eyed Asians. These results suggest that sensitivity of melatonin to light suppression is influenced by eye pigmentation and/or ethnicity...
  8. doi request reprint Inter-individual difference in pupil size correlates to suppression of melatonin by exposure to light
    Shigekazu Higuchi
    Department of Psychophysiology, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan
    Neurosci Lett 440:23-6. 2008
    ....
  9. ncbi request reprint Error and individual difference in cardiovascular responses to orthostatic stress in humans
    Keita Ishibashi
    Department of Physiological Anthropology, Faculty of Design, Kyushu University, Fukuoka, Japan
    J Physiol Anthropol Appl Human Sci 24:339-43. 2005
    ..In the perspective of physiological parameters, PC monitoring may serve as an empirical approach to evaluate physiological polymorphism...
  10. doi request reprint Work schedule differences in sleep problems of nursing home caregivers
    Masaya Takahashi
    National Institute of Occupational Safety and Health, 6 21 1, Nagao, Tama ku, Kawasaki 214 8585, Japan
    Appl Ergon 39:597-604. 2008
    ..33, 1.36-4.02), and poor sleep quality (2.15, 1.09-4.22). Our data suggest that working under a rotating two-shift system, which has a longer night shift, is associated with an elevated risk of sleep problems for nursing home caregivers...
  11. ncbi request reprint Effects of lifestyle, body composition, and physical fitness on cold tolerance in humans
    Takafumi Maeda
    Department of Hygiene and Preventive Medicine, Fukushima Medical University School of Medicine, Fukushima, Japan
    J Physiol Anthropol Appl Human Sci 24:439-43. 2005
    ..These results suggest that some lifestyle factors affect cold tolerance; in particular, daily activity might improve our ability to control heat radiation and basal heat production...