A computer-video interactive system is able to quantify involuntary movements of the face in patients with facial nerve dysfunction. Christopher Linstrom, MD, from the department of otolaryngology-head and neck surgery, The New York Eye and Ear Infirmary, New York, United States conducted a clinical, prospective non-randomized study of the computer system, which is called the Peak Motus Motion Measurement System.
Dr. Linstrom used the Peak Motus Motion Measurement System to study linear displacement at preselected facial landmarks, which he marked with reflective beads, on the faces of 34 normal subjects and 26 individuals with facial nerve dysfunction of various etiologies.
He studied a variety of expressions. In particular, the ‘eyes closed’ and ‘closed-lip smile’ facial expressions were studied in all subjects.
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