Among the sleep disorders studied, insomnia demonstrated a more extensive association with indoor environmental factors, including light effect, temperature effect, and bed effect in men and temperature effect and bed effect in women, compared to other sleep disorders.

e use of light-emitting electronic devices before bedtime may contribute to or exacerbate sleep problems. Exposure to blue-wavelength light in particular from these devices may affect sleep by suppressing melatonin and causing neurophysiologic arousal. We aimed to determine if wearing amber-tinted blue light-blocking lenses before bedtime improves sleep in individuals with insomnia. Fourteen individuals (n = 8 females; age ± SD 46.6 ± 11.5 y) with insomnia symptoms wore blue light-blocking amber lenses or clear placebo lenses in lightweight wraparound frames for 2 h immediately preceding bedtime for 7 consecutive nights in a randomized crossover trial (4-wk washout). Ambulatory sleep measures included the Pittsburgh Insomnia Rating Scale (PIRS) completed at the end of each intervention period, and daily post-sleep questionnaire and wrist-actigraphy. PIRS total scores, and Quality of Life, Distress, and Sleep Parameter subscales, were improved in amber vs. clear lenses condition (p-values <0.05). Reported wake-time was significantly delayed, and mean subjective total sleep time (TST), overall quality, and soundness of sleep were significantly higher (p-values <0.05) in amber vs. clear lenses condition over the 7-d intervention period. Actigraphic measures of TST only were significantly higher in amber vs. clear lenses condition (p = 0.035). Wearing amber vs. clear lenses for 2-h preceding bedtime for 1 week improved sleep in individuals with insomnia symptoms. These findings have health relevance given the broad use of light-emitting devices before bedtime and prevalence of insomnia. Amber lenses represent a safe, affordable, and easily implemented therapeutic intervention for insomnia symptoms.

The Sleep Foundation reports that exposure to blue light leading up to bedtime can hinder sleep. This is because: Group of answer choicesAll of the above are correctBlue light reduces the body temperatureBlue light may suppress the body's secretion of melatoninBlue light reduces heart rate

During summer, many people complain about difficulty sleeping during warm nights. This is likely because?(Select all that apply, even if only one applies)Group of answer choicesLong periods of sunlight disrupts our circadian rhythmSleep wake cycle is tied to core body temperatureHigh humidity prevents sleepDaylight saving disrupts our circadian rhythm

Name and describe 3 sleep disorders or circadian disorders that you have heard of.

Which one is not the type of sleep disorder?