21.   The facial feedback effect seems to work through physiological cues, in which the position of our facial muscles feeds information back to our brain.

22.   The facial muscles are not frozen, but temporarily softened.

23.   The facial muscles twitch and contort, as if pummeled by a hail of invisible darts.

24.   The procedure, which eliminates wrinkles by paralyzing some facial muscles, also minimizes facial expression.

25.   The speech pathologist here says there is a big difference in her facial muscle tone.

26.   The weakened facial muscles that make it difficult for Trae to speak also cause him to drool.

27.   This vagal nerve complex controls the facial muscles and the larynx, and therefore allows facial expressiveness and vocalizations, the kindred souls of emotionality.

28.   Used in extremely diluted form, Botox reduces wrinkles by temporarily blocking the nerves that signal facial muscles to contract, causing wrinkles.

29.   Without the follow-up maintenance, facial muscles will begin to loosen and sag again after a couple of years, they say.

30.   You get to count the number of facial muscles in a human head.