Amal A. Mahdy* and Amal A. Shehab
Anatomy and Embryology Department, Faculty of Medicine, Tanta University, Gharbia, Egypt.*firstname.lastname@example.org
Abstract: Background: Suprascapular nerve entrapment has several causes particularly at the suprascapular notch. Anatomical variation of the notch is considered as one of the causes. Aim of the work: Study the variations of the suprascapular notch in Egyptian scapulae considering them as possible predisposing factor for suprascapular nerve entrapment. Material and Methods: One hundred and thirty two dried scapulae were examined and classified. Vertical (VD) and transverse (TD) diameters of the suprascapular notch as well as the distance (SGND) between its lower margin and the base of the spinoglenoid notch were measured. For all scapulae, maximal width (W), maximal length (L) and their index (W/L) were recorded. The previous measurements were statistically studied. Comparative analysis of the measured parameters was done and percentage of each type was calculated. Morphological variations of the suprascapular notches were studied. Results: Five types of suprascapular notches were recorded; type I having no notch (6.06 %). Type II notch was the most prevalent type (45.45%) with longer TD. Type III notch (43.93%) had longer VD or equal VD and TD. Type IV with suprascapular foramen was found in 3.03% while 1.5 % was of type V which had a foramen with a notch. Highly significant negative correlation was present between VD of the notch with SGND in types II and III scapular notches. However, there was highly significant and significant correlation between TD with SGND as well as with L and W/L index in type III. There were no other statistically significant correlations between measured parameters of the scapulae with the dimensions of suprascapular notches. Also, there was no statistically significant difference between the measured parameters (SGND, W, L & W/L) in types I, II and III. Three morphological variations were detected in the scapulae having suprascapular notches (types II and III). They were U shape (76.27%), V shape (13.56%) and J shape (10.17%). Conclusion: This study classified the suprascapular notch into five types and three morphological variations which could be used in further investigations for management of suprascapular nerve entrapment.
[Amal A. Mahdy and Amal A. Shehab. Morphometric Variations of the Suprascapular Notch as a Potential Cause of Neuropathy: Anatomical Study. J Am Sci 2013;9(3):189-197] (ISSN: 1545-1003).http://www.americanscience.org. 25
Keywords: Morphometric Variation; Suprascapular Notch; Neuropathy: Anatomical Study Full Text 25