The effects of a 12-hour shift in the wake-sleep cycle on physiological and biochemical responses and on multiple task performance.

Details

• Creators:
  Higgins, E.A. ; Chiles, W.D. ; McKenzie, J.M. ; Burr, M.J. ; Vaughan, J.A. ; Jennings, A.E.
• Corporate Creators:
  Civil Aeromedical Institute
• Corporate Contributors:
  United States. Office of Aviation Medicine
• Subject/TRT Terms:
  • Shifts
  • Night shifts
  • Sleep
  • Circadian rhythms
  • Fatigue (Physiological condition)
  • Physiological aspects
  • Heart rate
  • Potassium
  • Sodium
  • Temperature
  More +
• Publication/ Report Number:
  FAA-AM-75-10 ; DOT/FAA/AM-75/10
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  OAM report.
• Corporate Publisher:
  Civil Aerospace Medical Institute
• Abstract:
  Fifteen male paid volunteers (ages 20 to 28) were studied in three groups of five each. The first 4 days of the experiment they slept nights (2230 to 0600( and worked days. On the fifth night, they slept only 3 hours (2100 to 2400) before starting a 10-day period in which the wake-sleep cycle was altered by 12 hours. According to the subjective fatigue index, the total fatigue for the awake periods was not significantly changed; however, the times within days for greatest fatigue were altered and 9 days were required for a complete reversal of the daily pattern. from shortest to longest mean rephasal times, these were; heart rate, norepinephrine, epinephrine, potassium, sodium, internal body temperature, and 17-ketogenic steroids. ; Performance data based on the Civil Aeromedical Institute Multiple Task Performance Battery suggest the following: ; 1.There was evidence of diurnal variation during the preshift period. ; 2.There were decrements on the day of the shift following the short sleep period. ; 3.Performance during the first 3 days following the shift was relatively high for most of the day but was relatively poor in the final session of the day. ; 4.Performance on the fourth through sixth postshift days was average or above average for the experiment with relatively small variations among the five test sessions per day. ; 5.Performance on the seventh through ninth postshift days was below average for the experiment and showed some evidence of a return to a diurnal cycling pattern with a new peak period of performance that reflected the 12-hour shift in the wake-sleep schedule.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/21068/dot_21068_DS1.pdf
• File Type:
  [PDF - 1022.62 KB]
• Collection(s):
  FAA Civil Aerospace Medical Institute ; US Transportation Collection
• Main Document Checksum:
  urn:sha-512:b5803ad3ea16cf269329ab57e2942b5bf0bec270c08988fe55cdf2b21868999d584d4d2ba4efd6486852e984d61020eceda61e2169a89fad720c5eeffd940f41