Today, in patients with facial paralysis, the assessment of the deficit is carried out using a subjective scale such as the House Brackman [1] or EMG scale of the facial nerve but does not distinguish each muscle individually . Objective measurements of skin muscles such as thickness and volume, in preoperative assessment of a facial paralysis rehabilitation surgery, would be useful in order to choose the most appropriate surgical technique. Indeed, too much amyotrophy will contraindicate hypoglosso-facial anastomosis (VII-XII) and it will be preferable to propose a temporal elongation myoplasty or a reinfused free muscle flap.