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Figure 1. Methods in size measurements (cross-sectional area, length, and volume) and orientation of the masticatory muscles. (A) Reconstruction of MR images and individual jaw muscles: masseter (green), medial pterygoid (orange), and lateral pterygoid (red). Two different participants are shown, with the patient on the left as an experimental subject and the control on the right. (B) Reconstructed images showing the sagittal angle of the right jaw muscles. Horizontal lines are parallel to the Frankfort horizontal plane. Oblique lines represent the long axes of the muscles. Angle between the two lines describes the sagittal orientation of the muscles. (C) Coronal (masseter and medial pterygoid) and axial (lateral pterygoid) scans, showing the orientation in the respective planes. Horizontal lines are parallel to the Frankfort horizontal plane. Abbreviations: MS, masseter muscle; MP, medial pterygoid muscle; LP, lateral pterygoid muscle.
J DENT RES, Vol. 85, No. 6,
552-556 (2006)
DOI: 10.1177/154405910608500614
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