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Photoplethysmography

Image split in half with two backgrounds, day and night, with a watch in the center. A face on the watch is half awake on the day side of the image and asleep on the night side. Illustrated by McCall Sarrett.
Collaborations Neuroscience Technologies Sleep 

What I Learned from Tracking My Sleep with Fitbit for Two Months

August 28, 2019August 28, 2019 Joel Frohlich 0 Comments Blood Oxygenation, EEG, Fitbit, Non-REM Sleep, Photoplethysmography, Polysomnography, PPG, REM sleep, Sleep, Sleep Apnea
If someone had told me a year ago that he sleeps with his watch on at night, I’d probably wonder just how eccentric of a personality I was dealing with.… Read more

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