Sangam Muralidhar Reddy, Sarada Devi Sattiraju Sri, Krupadanam Karumanchi, Anasuya Kolla
Associate Professor, Department of Anatomy, NRI Medical College , Chinakakani, Guntur, AP, India .
J Clin Diagn Res. 2013 Feb;7(2):189-92. doi: 10.7860/JCDR/2013/4838.2723. Epub 2013 Feb 1.
A suprascapular nerve entrapment can occur at the suprascapular notch or at the spinoglenoid notch. So, the size and shape of the suprascapular notch are associated with suprascapular entrapment neuropathy as well as with an injury to the suprascapular nerve in arthroscopic procedures. The knowledge on the variations along the course of the nerve is important in understanding the source of the entrapment syndrome.
The present study was carried out on 104 scapulae which were obtained from the Department of Anatomy, NRI Medical College and from other nearby medical colleges. The suprascapular notches in the scapulae were classified, based on the descriptions of Rengachary et al and Ticker et al. The distance between the suprascapular notch and the supraglenoid tubercle, and the distance between the posterior rim of the glenoid cavity and the medial wall of the spinoglenoid notch at the base of the scapular spine, were determined. The data were analyzed statistically.
Based on the Rengachary classification, the type III notch was more common. The suprascapular foramen was observed in 2 scapulae. In 56.73% scapulae, the superior transverse diameter was greater than the maximum depth. The U shaped notch (69.23%) was more common. 2.88% and 8.65% scapulae fell short of the mentioned respective safe zone distances from the margin of the glenoid cavity.
Such studies may be useful in understanding the role of the notch in causing nerve entrapment and to prevent iatrogenic nerve injuries while posterior approaches are made to the shoulder joint.
肩胛上神经卡压可发生于肩胛上切迹或肩胛下肌下孔。因此，肩胛上切迹的大小和形状与肩胛上神经卡压性神经病以及关节镜手术中肩胛上神经损伤相关。了解神经走行过程中的变异对于理解卡压综合征的病因很重要。
本研究对104块肩胛骨进行，这些肩胛骨取自NRI医学院解剖学系及其他附近医学院校。根据Rengachary等人和Ticker等人的描述对肩胛骨的肩胛上切迹进行分类。测定肩胛上切迹与盂上结节之间的距离，以及肩胛冈基部关节盂腔后缘与肩胛下肌下孔内侧壁之间的距离。对数据进行统计学分析。
根据Rengachary分类，III型切迹更为常见。在2块肩胛骨中观察到肩胛上孔。在56.73%的肩胛骨中，上横径大于最大深度。U形切迹（69.23%）更为常见。2.88%和8.65%的肩胛骨距离关节盂腔边缘未达到上述各自的安全区距离。
此类研究可能有助于理解切迹在导致神经卡压中的作用，并在对肩关节进行后路手术时预防医源性神经损伤。
