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Detection and perceptual impact of side-to-side facial movement asymmetry

机译：侧向面部运动不对称的检测和感知撞击

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IMPORTANCE In this study,we examined whether specific facialmovements have different time-delay detection thresholds, and to what extent such side-to-side facialmovement asymmetry affects subjective ratings ofmovement naturalness. Ratings of dynamic asymmetry in experimentally manipulated video recordings demonstrate that there are different side-to-side time-delay thresholds for distinct regions of the face, with a strong inverse correlation between naturalness rating and the length-of-time delay. These findings will be helpful for counseling patients with unilateral facial paralysis and guide the design of neural interfaces for facial reanimation. OBJECTIVE To determine the detection threshold of side-to-side facial movement timing asymmetry and measure its effect on perceived movement naturalness. DESIGN, SETTING, AND PARTICIPANTS Videos of 5 symmetrical facial movements (eye blink, rapid eyebrow raising, slow eyebrow raising, smiling, and lip depression) were edited to introduce 6 levels of side-to-side timing asymmetry, ranging from 33 to 267 milliseconds. Participants (N = 58) viewed video clips through an online survey service, indicating whether they noticed side-to-side asymmetry and judgingmovement naturalness on a 5-point scale. RESULTS Therewas a significant difference among facialmovements in asymmetry detection threshold. Therewas a strong correlation between naturalness ratings and amount of delay acrossmovements (R = 0.823), with greater asymmetry being judged as progressively less natural. Blinkwas judged as less natural at 33, 67, 100, and 133 milliseconds of side-to-side delay compared with all othermovements (P < .005). CONCLUSIONS AND RELEVANCE Side-to-side asymmetry in blink timing is detected sooner and viewed as less natural compared with asymmetry of the eyebrow and lips. At 100 milliseconds of delay, nearly all movements are detected as asymmetric, although blink is judged as the least natural. These findings will help set timing goals for facial pacing technologies treating unilateral paralysis.
机译：在本研究中的重要性，我们检查了特定的面部材料是否具有不同的时滞检测阈值，以及这种侧面面部体内不对称的程度影响了自然的主观评级。实验操纵视频记录中动态不对称的额定值证明存在面部不同区域的不同侧向侧的时延阈值，自然评级与时间长度延迟之间具有很强的反比相关性。这些发现将有助于咨询单侧面部瘫痪的患者，并指导面部恢复的神经界面设计。目的确定侧向面部运动正时不对称的检测阈值，并测量其对感知运动自然的影响。编辑了5个对称面部运动（眼睛眨眼，快速眉毛提高，微笑和唇抑郁症）的设计，设置和参与者的视频，以引入6级侧向侧时序不对称，从33到267毫秒。参与者（n = 58）通过在线调查服务查看视频剪辑，表明它们是否注意到侧向不对称和判断为5分尺寸的自然。结果在不对称检测阈值中的面部术中存在显着差异。因此，自然评级和延迟运动量之间的强烈相关性（r = 0.823），具有更大的不对称性被判断为逐渐减少自然。与所有其他操作相比，Blinkwas在33,67,100和133毫秒的侧面延迟中判定为较少的自然延迟（P <.005）。结论和相关性眨眼时机中的侧向不对称性较早检测到，与眉毛和嘴唇的不对称相比视为较少的自然。在100毫秒的延迟下，几乎所有运动都被检测到不对称，尽管眨眼被判断为最不自然。这些调查结果将有助于设定治疗单侧瘫痪的面部起搏技术的时间目标。

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  • 来源
    《JAMA facial plastic surgery》 |2013年第6期|共6页
  • 作者

    SangW.K.; HellerE.S.; HohmanM.H.; HadlockT.A.; HeatonJ.T.;

  • 作者单位

    Department of Otolaryngology Massachusetts Eye and Ear Infirmary 243 Charles St Boston MA 02114;

    Department of Otolaryngology Massachusetts Eye and Ear Infirmary 243 Charles St Boston MA 02114;

    Department of Otolaryngology Massachusetts Eye and Ear Infirmary 243 Charles St Boston MA 02114;

    Department of Otolaryngology Massachusetts Eye and Ear Infirmary 243 Charles St Boston MA 02114;

    Department of Otolaryngology Massachusetts Eye and Ear Infirmary 243 Charles St Boston MA 02114;

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  • 正文语种 eng
  • 中图分类 整形外科学（修复外科学）;
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