Kinematic analysis of a Duchenne smile.

Arch Oral Biol

Department of Biologic and Materials Sciences, School of Dentistry, University of Michigan, Ann Arbor, MI 48109-1078, USA. Electronic address:

Published: April 2016

Objective: Facial expressions are communicative motor outputs, whose kinematics likely are due to musculoskeletal anatomy, neuromotor activity and the well-being and internal states of the individual. However, little has been published on the kinematics of facial expression. This study quantified lip, eye and cheek movements during the production of a Duchenne smile involving movement of lips and tissues surrounding the eyes.

Design: The three-dimensional positions of 20 markers placed around the eyes, cheeks, lips and chins of 24 young adult female subjects were digitized while they performed smiles after practicing to feedback from an investigator trained in the facial action coding system (FACS). Displacement, velocity and acceleration variables were extracted and analyzed from the markers.

Results: Results demonstrated several consistencies across subjects including: (1) relatively high peak velocities, accelerations and displacements for lip and cheek markers in the vertical and anteroposterior dimensions, (2) relatively large movements of the lower lateral eye region compared with other eye regions.

Conclusion: The results indicate that there is significant movement in the anteroposterior dimension that is not observable in frontal views of the face alone.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.archoralbio.2015.12.005DOI Listing

Publication Analysis

Top Keywords

duchenne smile
8
kinematic analysis
4
analysis duchenne
4
smile objective
4
objective facial
4
facial expressions
4
expressions communicative
4
communicative motor
4
motor outputs
4
outputs kinematics
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!