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. Author manuscript; available in PMC: 2014 Oct 29.
Published in final edited form as: Comput Methods Biomech Biomed Eng Imaging Vis. 2013 Oct 29:10.1080/21681163.2013.846231. doi: 10.1080/21681163.2013.846231

Figure 5.

Figure 5

Figure 5

Figure 5

a. The first principal component of variance for one subject repeated swallows task accounts for 81.5% of the shape change variance

b. Plotted morphologies of one subject repeated swallows task. A scatter plot of PC scores (deviations of the grand mean) for each frame of swallowing coded by phase of swallowing shows that principal component 1 is largely defined by hyolaryngeal excursion. This scatter plot shows oral phase 1 and 2 at one end of the spectrum and pharyngeal phase 1 at the other indicating that these phases represent the extremes of hyolaryngeal excursion.

c. Eigenvectors of one subject repeated swallows task confirms two muscular slings underlie hyolaryngeal elevation