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Presented by: Devin OveringtonTHE EFFECT OF SELF-LUMINOUS DEVICESON MELATONIN LEVELS IN TEENS
INTRODUCTION• New technologies in self-luminous devices increases theamount of time that many people spend viewing these devices.• Recent studies are beginning to look at the effects this mayhave on our everyday lives.• One of the most important is how self-luminous devices effectMelatonin levels in the body.Self-luminous- Possessing in itself the property of emitting light.HypothesisIntroduction Methods Results Discussion Conclusion
INTRODUCTION• Laboratory experiments have been done using personalcomputers and tablets. (Figueiro et al. and Wood et al.)• Tests have indicated that the level ofMelatonin suppression after a two hourexposure to light is more statisticallysignificant than one hour only.Melatonin- a vertebrate hormone that is derived from serotonin, issecreted by the pineal gland especially in response to darkness,and has been linked to the regulation of circadian rhythms.Hypothesis Methods Results DiscussionIntroduction Conclusion
INTRODUCTIONHypothesis Methods Results DiscussionIntroduction Conclusion• Melatonin is suppressed when a person is exposed to light.
HYPOTHESISUsing self-luminous devices for two hours in the eveningwill suppress melatonin levels and inhibit sleep morethan evening activities that do not involve these devices.HypothesisIntroduction Methods Results Discussion Conclusion
METHODS AND MATERIALS• Dimesimeters to collect light data• Melatonin saliva test to keep track of Melatonin suppression• Form for the test subjects to fill out when they use a self-luminous deviceHypothesisIntroduction Methods Results Discussion Conclusion
METHODS AND MATERIALS• There will be about 20 subjects tested.• Subjects will be High School students, their ages will beapproximately 14 to 18 years old.• They will be asked about how often they use self-luminousdevices, any medications they may take that effect melatoninlevels, and their usual sleep schedule.HypothesisIntroduction Results DiscussionMethods Conclusion
METHODS AND MATERIALS TESTING WEEKS• Each subject will be testing for two weeks.• For both weeks the following will have to be done:• Subjects will be given a Dimesimeter and saliva tests• They will go home and begin the testing for that week• Two hours before they go to bed they will put on theDimesimeter and use the saliva test.• During the testing they will be asked to keep to a regularsleep schedule.HypothesisIntroduction Results DiscussionMethods Conclusion
METHODS AND MATERIALS• They will continue doing their normal activities for that week(Using computers, tablets, phones and other self-luminousdevices as they would normally)• The second week the subjects will be asked to refrain fromusing self-luminous devices two hours before they go to bedTESTING WEEK 1TESTING WEEK 2HypothesisIntroduction Results DiscussionMethods Conclusion
RESULTS• Collect data from the Dimesimeters• The data is collected in photopic illuminance (Lux) values.• This data also shows the colors of the lighting.• Analyze data from the saliva tests for Melatonin• I would hope to find a larger suppression level when thesubjects use self-luminous devices before they go to bed.HypothesisIntroduction Methods Results Discussion Conclusion
RESULTSHypothesisIntroduction Methods Results Discussion ConclusionDate Red Green Blue Light in LUXWeek 1Melatonin LevelsDate Red Green Blue Light in LUXWeek 2Melatonin Levels
RESULTSHypothesisIntroduction Methods Results Discussion ConclusionParticipant # Red Green Blue Light in LUX1234567891011121314151617181920Week 1Melatonin Levels
DISCUSSION• Subjects not following directions• They do not take a saliva test when they were supposed to.• They do not stay on a regular sleep schedule.• If they take any medications or supplements that effectmelatonin levels.HypothesisIntroduction Methods Results Discussion Conclusion
CONCLUSION• When a person is using a self-luminous device for two hours ormore before bed, they will have more melatonin suppressionthan when they do not use those devices.Future Impact• People with sleeping problems may find that if they stop usingself-luminous devices they may sleep better.• New devices could be tested to see if they affect sleep indifferent ways.HypothesisIntroduction Methods Results Discussion Conclusion