Figure 3 (A and B): Sagittal drawing (A) and T1-weighted MR image (B) demonstrate the geniohyoid muscles (gh) and the fanlike shape of the genioglossus muscles (gg). The mylohyoid muscle (mh) extends from the mandible to the hyoid bone and supports the floor of the mouth. Sagittal T1-weighted image (B) shows the fan-shaped genioglossus (short arrow), the longitudinal intrinsic muscle (long arrow), and darkly hypointense geniohyoid (star) from genial tubercle to hyoid