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OBJECTIVE (1) To determine which facial landmarks show the greatest movement during specific facial animations and (2) to determine the sensitivity of our instrument in using these landmarks to detect putatively abnormal facial movements. DESIGN Movements of an array of skin-based landmarks on five healthy human subjects (2 men and 3 women; mean age, 27.6(More)
The objective of this study was two-fold: (1) to explore the suitability of a novel modified Procrustes fit method to adjust data for head motion during instructed facial movements, and (2) to compare the adjusted data among repaired unilateral (n = 4) and bilateral (n = 5) cleft lip and palate patients and noncleft control subjects (n = 50). Using a(More)
OBJECTIVE To explore nasolabial movements in participants with repaired cleft lip and palate. DESIGN A parallel, three-group, nonrandomized clinical trial. SUBJECTS Group 1=31 participants with a cleft lip slated for revision surgery (revision), group 2=32 participants with a cleft lip who did not have surgery (nonrevision), and group 3=37 noncleft(More)
The decision for lip revision surgery in patients with repaired cleft lip/palate is based on surgeons' subjective evaluation of lip disability. An objective evaluation would be highly beneficial for the assessment of surgical outcomes. In this study, the effects of lip revision on circumoral movements were objectively quantified. The hypothesis was that lip(More)
The admixture test for the detection of linkage under heterogeneity is considered. We show that the null distribution of this test statistic has half its weight concentrated on zero and the other half on a complicated distribution that can be approximated by max (X1,X2) where X1 and X2 are independent X1(2) variables. We also investigate the stability of(More)
OBJECTIVE This study demonstrates a method of quantifying facial movements based on distortions of the skin surface. DESIGN Landmarks were identified on the faces of five healthy human subjects (2 men and 3 women; mean age, 27.6 years; range, 26 to 29 years), and the distortions were characterized by changes in the separation between 20 pairs of landmark(More)
The aim of this study was to quantify facial movements in a sample of normal adults and to investigate the influence of sex and facial shape on these movements. The study sample consisted of 50 healthy adult subjects, 25 males and 25 females (age: mean = 27.3 years; range = 23-39 years). A video-based tracking system was used to track small-diameter(More)
Functional responses are encountered when units are observed over time. Although the whole function itself is not observed, a suuciently large number of evaluations, as is common with modern recording equipment, are assumed to be available. Functional regression analysis relates the functional response, y(t), to known covariates, x, by a linear combination(More)
An improved sib-pair test for linkage is introduced which is superior to the previously proposed tests. The test is derived from the standard chi-squared goodness of fit statistic by restricting the alternative hypothesis to the genetically possible. Critical values are given and exact power comparisons are made with the previously proposed tests. The new(More)
The Engineering Meetings Board has approved this paper for publication. It has successfully completed SAE's peer review process under the supervision of the session organizer. This process requires a minimum of three (3) reviews by industry experts. Positions and opinions advanced in this paper are those of the author(s) and not necessarily those of SAE.(More)