Muscles of facial expression
e.g. movements of forehead, eyebrows, periorbital area, cheeks, including,
frowning, blinking, smiling, grimacing
Lips and perioral area
e.g. puckering, pouting, smacking
Jaw
e.g., biting, clenching, chewing, mouth opening, lateral movement
Tongue
Rate only increases in movement both in and out of mouth, NOT inability to sustain movement