Access to Electric Light Is Associated with Shorter Sleep Duration - - PowerPoint PPT Presentation

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Access to Electric Light Is Associated with Shorter Sleep Duration - - PowerPoint PPT Presentation

Mar 19, 2024 329 likes •491 views

Access to Electric Light Is Associated with Shorter Sleep Duration in Toba Communities of The Argentinean Chaco Horacio O. de la Iglesia Eduardo Fernndez-Duque Norberto Lanza Diego A. Golombek Jeanne F. Duffy Charles D. Czeisler and

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SLIDE 1

Access to Electric Light Is Associated with Shorter Sleep Duration in Toba Communities of The Argentinean Chaco

Horacio O. de la Iglesia Eduardo Fernández-Duque Norberto Lanza Diego A. Golombek Jeanne F. Duffy Charles D. Czeisler and Claudia R. Valeggia

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SLIDE 2

Photoreceptors (retina) Input pathways Environmental Cycle (e.g.. light-dark cycle) Clock (suprachiasmatic nucleus)

III VI IX I

Overt circadian rhythms (e.g. sleep-wake cycle) Output pathways

Components of Mammalian Circadian System

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SLIDE 3

Flying squirrels can be entrained by

  • ne second of light per day
  • ne second!

The circadian system is highly sensitive to light resetting

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SLIDE 4

The human circadian system can be reset by artificial light

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SLIDE 5

Could our ancestral sleep timing have changed by the access to artificial light, particularly electric light?

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SLIDE 6

The Toba

Latitude: 23º 47min Longitude: 61º 48min

árez uá

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SLIDE 7

Activity data loggers

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SLIDE 8
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SLIDE 9

100 200 300 400 500 600 700 800 900

time 40 100 160 220 280 340 400 460 520 580 640 700 760 820 880 940 1000 1060 1120 1180 1240 1300 1360

100 200 300 400 500 600 700 800 900

time 40 100 160 220 280 340 400 460 520 580 640 700 760 820 880 940 1000 1060 1120 1180 1240 1300 1360

12 16 20 00 4 8 12 Clock time Locomotor activity Sunset Sunrise

November (summer)

100 200 300 400 500 600 700 800 900 80 160 240 320 400 480 560 640 720 800 880 960 1040 1120 1200 1280 1360

12 16 20 00 4 8 12 Clock time

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SLIDE 10

November (summer)

Bedtime Rise time Sleep

  • nset

Sleep

  • ffset

Bedtime Rise time Sleep

  • nset

Sleep

  • ffset

*

† Time in bed Sleep duration Time in bed Sleep duration NO-electricity Electricity 1700 2200 0300 0800 1300 Clock time

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SLIDE 11

Locomotor activity

100 200 300 400 500 600 700 800 900 80 160 240 320 400 480 560 640 720 800 880 960 1040 1120 1200 1280 1360

12 16 20 00 4 8 12 Clock time

August (winter)

Sunset Sunrise

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SLIDE 12

Bedtime Rise time Sleep

  • nset

Sleep

  • ffset

Bedtime Rise time Sleep

  • nset

Sleep

  • ffset

*

†

¥

Time in bed Sleep duration Time in bed Sleep duration NO-electricity Electricity 1700 2200 0300 0800 1300 Clock time

August (winter)

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SLIDE 13

NO-electricity

Bedtime Get up time Sleep

  • nset

Sleep

  • ffset

Bedtime Get up time Sleep

  • nset

Sleep

  • ffset

#

¥

Time in bed Sleep duration Time in bed Sleep duration Winter Summer 1700 2200 0300 0800 1300 Clock time

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SLIDE 14

Bedtime Rise time Sleep

  • nset

Sleep

  • ffset

Bedtime Rise time Sleep

  • nset

Sleep

  • ffset

*

Winter Summer

¥

Time in bed Sleep duration Time in bed Sleep duration 1700 2200 0300 0800 1300 Clock time

Electricity

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SLIDE 15

Acknowledgments

The Toba communities of Sombrero Negro and Barrio Qompi. Thank you for your friendship!