Extension of effective day length and its effect on sleep characteristics due to exposure to mobile phone screen in female students in a semi urban and urban setting
Journal Title: INDIAN JOURNAL OF MENTAL HEALTH - Year 2018, Vol 5, Issue 1
Abstract
Background: Approximately more than 2.5 billion cell phones are projected for 2017. The blue light emitted by screens on cell phones, computers, tablets, and televisions restrain the production of melatonin is the hormone that controls the sleep/wake cycle or circadian rhythm. There is ample evidence that anovel, short-wavelength-sensitive photoreceptor system is primarily responsible for a variety of non-visual light responses, in particular, resetting the timing of the circadian pacemaker, suppressing melatonin production. Methods: The study investigates the effect of exposure to LED backlit screens used in cell phones by 50 undergraduate girls of Goa and Mumbai in the age group of 18 to 22. Data was collected using the Kristin Dehmler Technology usage scale, the Insomnia impact scale, Epworth Sleepiness scale. [Pittsburgh sleep quality index (PSQI)], and sleep-wake behavior [Munich chronotype questionnaire (MCTQ). T-tests and correlations using the SPSS to assess differences in the two groups of semi u ban and metropolitan girls were done.Results: The study predicts that this light exposure will extend day length and impact sleep characteristics in the form of number of awakenings, difficulties in initiating and maintaining sleep, non-restorative sleep and nighttime restlessness. The endogenous evening rise in melatonin occurred later in the LED-backlight condition; due to the use of cell phones affected the circadian pacemaker located in the suprachiasmatic nuclei which most likely received a longer “day” signal, inducing a phase delay. Conclusion: Participants reported higher amounts of nocturnal cell phone use reported spending less time sleeping and poorer sleep quality No significant differences were found between the urban Mumbai group and the semi urban Goa group.
Authors and Affiliations
Jennie Mendes
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