linkedin post 2020-12-06 04:52:04

THE EPHEMERAL SMILE. “The mimetic muscles that control smiling, dominated by quick-to-fatigue type II myosin fibers, typically fire that smile quickly but we tire after just a minute or so of holding that smile for family photos.”

http://onlinelibrary.wiley.com/doi/10.1111/joa.12440/full

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