Hence, the opening pressure of the auditory tube is moderated by the action of the medial pterygoid muscle.Ĭonclusion The influence of the medial pterygoid muscle on the opening pressure of the auditory tube may have an impact on the diagnosis and therapy in patients with patent auditory tube as well as the middle ear pathology in patients with cleft palate.Ībstract: The aim of this study was the introduction of a specific class of signals, the so-called perfect sequences (PSEQ), in a novel approach for sonotubometry of the Eustachian tube (ET). Contraction of the medial pterygoid muscle increases and relaxation decreases the force of the tensor veli palatini muscle on the distal part of the auditory tube. Results Functional 3-D reconstructions of the paratubal structures reveal that the medial pterygoid muscle is acting as a movable hypomochlion of the tensor veli palatini muscle. Methods High-resolution cross-sectional T1 magnetic resonance imaging data of one of the authors' paratubal structures were used, a new functional 3-D model of the auditory tube and its related structures visualized by the Hamburg VOXEL-MAN digital image system. The aim of this study was to define the function of the medial pterygoid muscle concerning the muscular compliance of the auditory tube. Comprehensive morphological and functional evaluation of the auditory tube becomes possible within a single examination'.Ībstract: Objectives The role of the paratubal muscles, especially the medial pterygoid muscle, still is unclear. Conclusions : The introduced MRI protocol allow visualization of the opening of the auditory tube and provides detailed anatomical information of the nasopharynx. During the Valsalva test, opening of the auditory tube was demonstrated in 20 of the 22 investigated sides using the dynamic TFE single slice sequence. Results: With multi-slice sequences, the osseous part of the auditory tube, the tubal cartilage (middle and lateral lamina), the ciliated epithelium, Ostmann's adipose body and the levator and tensor veli palatini muscles were delineated in all cases. For the functional test a dynamic turbo-gradient echo sequence (TFE) with spectral fat suppression (T R /T E = 15/6,2 ms 4 sec) was obtained using the single slice technique before and during the Valsalva manoeuvre. For the morphological assessment, the imaging protocol included axial and coronal T 2 -weighted turbo-spin echo sequences (T R /T E = 3194/100 ms) and a T 1 -weighted gradient echo sequence (T R /T E = 42/4.6 ms). Methods: Eleven volunteers were included into this study.
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Abstract: Purpose: To develop and evaluate a protocol for the anatomic depiction and functional testing ot the auditory tube with the use of MR imaging.