After a severe car accident,Adam was hurt badly and couldn't move his facial muscles.What could be the result of lacking the physiological ability to smile?

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--The facial feedback hypothesis proposes that changes in the blood vessels in the face "feed back" temperature information in the brain,altering our experience of emotions.People without a smile on their face could have a different emotional state,which is less happy,than those with a smile.In Adam's case,lacking the physiological ability to smile might affect his mood,at least in the short term.
--Happiness makes people live longer,predisposes people to think more openly,and allows people to see the "big picture." Life will be easier for optimists than for pessimists.Thus,people with less happiness might have a shorter life and think more locally,paying too much attention to details.

After a Severe Car Accident,Adam Was Hurt Badly and Couldn't