Pathologic Changes of the Lateral Pterygoid Muscle in Patients with Derangement of the Temporomandibular Joint Disk: Objective Measures at MR Imaging
S.G. Findena,
W.S. Enochsa and
V.M. Raoa
a From the Department of Radiology, Thomas Jefferson University Hospital, Philadelphia, Pa

View larger version (170K):
[in this window]
[in a new window]
|
Fig 2. Example of a normal TMJ with the arrow pointing to a normally positioned disk in relationship to the condylar head. Representative region-of-interest fields have been placed over the superior and inferior heads of the LPM.
| |

View larger version (151K):
[in this window]
[in a new window]
|
Fig 3. Example of anterior disk displacement (arrow) in the closed-mouth position. Representative region-of-interest fields have been placed over the respective muscle bellies.
| |