Positive affect predicts improved lip movement in facial movement disorder.

Abstract

Positive affect in individuals with a facial movement disorder may promote lip corner movement (zygomaticus major) during smiling. We investigated whether a positive affect marker (orbicularis oculi activity) observed in an initial clinic visit of individuals with facial movement disorder (N = 28) predicted increased lip corner movement at a subsequent visit. In this clinical outcomes study, lip corner movement was assessed with the use of automated facial analysis. Asymmetry of movement was compared in individuals who smiled with or without the positive affect marker at an initial clinic visit. The positive affect marker at the initial visit was associated with a reduction in the asymmetry of the lip corner movement at the second visit. Positive affect predicts improved facial movement outcomes in patients with facial movement disorders. Positive emotion in facial movement patients may be an important factor in recovery of facial movement during therapy.