Chu Eugene A, Farrag Tarik Y, Ishii Lisa E, Byrne Patrick J
Department of Otolaryngology–Head & Neck Surgery, University of California, Irvine, USA.
Arch Facial Plast Surg. 2011 Jan-Feb;13(1):14-9. doi: 10.1001/archfacial.2010.101.
To determine the degree of facial asymmetry required to trigger conscious perception in the observer in a simulated model of facial paralysis.
A model of unilateral facial paralysis was created using the face of a participant without facial paralysis. Digital morphing software was used to create progressive asymmetry of the brow, oral commissure, and combined brow and oral commissure based on the typical sequelae seen in facial paralysis. Volunteers naive to the goals of the study repeatedly were shown a series of photographs of faces without facial paralysis, with the manipulated image interspersed within the series.
At least 3 mm of facial asymmetry of the oral commissure, brow, or both was required before participants detected the asymmetry. With longer display intervals, participants tended to detect a smaller degree of asymmetry.
To our knowledge, this is the first study directed at determining the amount of facial asymmetry required to trigger conscious perception of patients' facial paralysis in the naive observer. The pilot data and the discussion herein provide insight into the processes of visual perception of facial asymmetry and may be useful to surgeons for patient counseling and in setting surgical goals.
在面部麻痹模拟模型中确定引发观察者有意识感知所需的面部不对称程度。
使用一名无面部麻痹参与者的面部创建单侧面部麻痹模型。基于面部麻痹中常见的后遗症，使用数字变形软件创建眉毛、口角以及眉毛和口角联合的渐进性不对称。对该研究目的不知情的志愿者反复观看一系列无面部麻痹的面部照片，其中穿插有经过处理的图像。
在参与者检测到不对称之前，口角、眉毛或两者至少需要3毫米的面部不对称。显示间隔时间越长，参与者往往能检测到的不对称程度越小。
据我们所知，这是第一项旨在确定在不知情观察者中引发对面部麻痹患者面部不对称的有意识感知所需面部不对称量的研究。本文的初步数据和讨论为面部不对称视觉感知过程提供了见解，可能有助于外科医生为患者提供咨询并设定手术目标。
