Wojciechowski Tomasz, Skadorwa Tymon, Nève de Mévergnies Jean-Gualbert, Niemczyk Kazimierz
Department of Otolaryngology, The Medical University of Warsaw, 1a Banacha St., 02097, Warsaw, Poland.
Department of Descriptive and Clinical Anatomy, The Medical University of Warsaw, 5 Chalubinskiego St., 02004, Warsaw, Poland.
Anat Sci Int. 2020 Jan;95(1):31-37. doi: 10.1007/s12565-019-00490-6. Epub 2019 May 20.
The aim of this study was to evaluate the morphology of the stapedius muscle and its tendon with the use of microCT and to describe their anatomic relationship with facial nerve and incudostapedial joint. The study was performed on 16 fresh cadaveric temporal bones scanned in microtomography (microCT). Stapedius muscle and its tendon were identified in each set of images. The length of the medial and lateral border of the stapedius tendon (STL-med, STL-lat), width at the insertion to stapes (STW-s), at the point it emerges from the pyramidal eminence (STW-p) and in the half way from the pyramidal eminence to stapes (STW-m), and the length and the width of the belly of stapedius muscle (BSML and BSMW) were measured in modified axial plane. The shortest distance between the facial canal and incudostapedial joint (FN-isj), and between the facial canal and stapedius tendon (FN-st) were measured in the Pöschl plane. The average values of all distances measured were: STL-lat 1.29 ± 0.50 mm, STL-med 1.27 ± 0.44 mm, BSML 2.98 ± 0.51 mm, STW-s 0.47 ± 0.10 mm, STW-p 0.46 ± 0.12 mm, STW-m 0.35 ± 0.12 mm, BSMW 1.26 ± 0.29 mm, FN-isj 1.72 ± 0.33 mm, FN-st 1.35 ± 0.30 mm. The stapedius muscle complex consists of the tendon and the belly, and the border between them in microCT scans is not always evident. The distance between the facial nerve and the incudostapedial joint is greater than the distance between the facial nerve and the stapedius muscle tendon.
本研究的目的是利用显微CT评估镫骨肌及其肌腱的形态，并描述它们与面神经及砧镫关节的解剖关系。本研究对16个新鲜尸体颞骨进行了显微断层扫描（显微CT）。在每组图像中识别出镫骨肌及其肌腱。在改良的轴位平面上测量镫骨肌腱内侧和外侧边界的长度（STL-med、STL-lat）、在镫骨插入处的宽度（STW-s）、从锥隆起处穿出点的宽度（STW-p）以及在从锥隆起至镫骨中途点的宽度（STW-m），以及镫骨肌肌腹的长度和宽度（BSML和BSMW）。在Pöschl平面上测量面神经管与砧镫关节之间（FN-isj）以及面神经管与镫骨肌腱之间（FN-st）的最短距离。所有测量距离的平均值为：STL-lat 1.29±0.50毫米，STL-med 1.27±0.44毫米，BSML 2.98±0.51毫米，STW-s 0.47±0.10毫米，STW-p 0.46±0.12毫米，STW-m 0.35±0.12毫米，BSMW 1.26±0.29毫米，FN-isj 1.72±0.33毫米，FN-st 1.35±0.30毫米。镫骨肌复合体由肌腱和肌腹组成，在显微CT扫描中它们之间的边界并不总是清晰可见。面神经与砧镫关节之间的距离大于面神经与镫骨肌腱之间的距离。
