Department of Otorhinolaryngology, University Hospital Jena, Jena, Germany.
Institute for Biomagnetism and Biosignal Analysis, University of Münster, Germany.
Aesthet Surg J. 2021 May 18;41(6):NP609-NP615. doi: 10.1093/asj/sjaa393.
Botulinum toxin A (BTX), a neurotoxin widely used for facial aesthetics, causes dose-dependent muscle paralysis. It was hypothesized that treatment of mimic muscles with BTX might have a positive impact on emotional expression in static images (photographs), but a negative impact in dynamic recordings (videos).
The aim of this study was to compare of emotional expression recorded in photographs and videos before and after treatment with BTX.
Twenty healthy women (mean age, 45 years) received a dose of 19 mouse units of XEOMIN (Merz, Frankfurt am Main, Germany) into the procerus, occipitofrontalis, and orbicularis oculi muscles. Photographs and videos of the participants' faces with neutral and happy expressions were recorded before treatment and 2 weeks later. Recordings were rated by naive raters blind to the conditions and in balanced order.
Videos were generally rated as more pleasant, arousing, attractive, and genuine than photographs (all Ps > 0.001). This was especially the case for videos with neutral expression (P = 0.003). Independent of presentation mode and facial expression, women were rated as more attractive after BTX treatment (P = 0.03).
In contrast to the hypothesis, the reduced mobility had no detectable negative impact on dynamic emotional expression, but videos received more positive ratings, particularly for neutral expressions. It is thus recommended to assess emotional expression with dynamic recordings to evaluate the effects of treatment with BTX. BTX seems to improve perceived attractiveness, although the cause of this effect remains unclear.
肉毒杆菌毒素 A（BTX）是一种广泛用于面部美容的神经毒素，其作用具有剂量依赖性，可导致肌肉麻痹。有人假设，用 BTX 治疗表情肌可能会对面部静态图像（照片）中的情绪表达产生积极影响，但对动态记录（视频）产生负面影响。
本研究旨在比较 BTX 治疗前后照片和视频中记录的情绪表达。
20 名健康女性（平均年龄 45 岁）接受了 19 个小鼠单位的 Xeomin（德国美敦力，法兰克福）注射到皱眉肌、枕额肌和眼轮匝肌。在治疗前和 2 周后，分别对参与者中性和愉快表情的面部照片和视频进行记录。记录由对条件不知情且平衡顺序的陌生评估者进行评分。
视频通常被评为比照片更愉快、更有活力、更有吸引力和更真实（均 P>0.001）。对于中性表情的视频尤其如此（P=0.003）。无论呈现模式和面部表情如何，女性在接受 BTX 治疗后都被评为更有吸引力（P=0.03）。
与假设相反，运动受限对动态情绪表达没有明显的负面影响，但视频获得了更多的积极评价，尤其是对于中性表情。因此，建议使用动态记录评估 BTX 治疗的效果来评估情绪表达。尽管这种效果的原因尚不清楚，但 BTX 似乎可以提高感知吸引力。
