'Cues of Fatigue: Effects of Sleep Deprivation on Facial Appearance':
Other article 'Sleep Deprivation Affects Face Appearance, Study Shows':
Another article 'Study Reveals the Face of Sleep Deprivation' :
Definitely find it to seem accurate and quite on point.
Especially when it comes to this sentence within it: "Because these facial regions are important in the communication between humans, facial cues of sleep deprivation and fatigue may carry social consequences for the sleep deprived individual in everyday life."
I'd imagine many of us with Narcolepsy can find a relation to this, and the 'social interactions/consequences' element that relates to having such.
For me the droopy, purple under, the eyes and now in addition I can add, to my own noting of specifically, the lips drooping (from the articles descriptions), has always been there and it has had an effect for sure. Commonly I am awfully serious, I will admit that, but the seeming 'never' not serious and/or always 'down/sad/angry' is played into by the sleep deprivation effect/s...
It clearly seems relate-able to the recent 'online chatter' around/regarding the 'resting asshole face' or 'bithcy resting face' syndrome.
This (nonsense) article, I don't agree at all with it (and this article is completely not related to N) [am just putting it here to follow up the above line..]: