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Published on: February 10, 2015
Morphometric study of the suprascapular notch: proposal of classification
Michał Polguj1, Kazimierz Jędrzejewski, Michał Podgórski
1Department of Normal and Clinical Anatomy, Chair of Anatomy, Medical University of Łódź, Narutowicza 60, 90-136, Lodz, Poland. michal.polguj@umed.lodz.pl
Surgical and Radiologic Anatomy : SRA
|May 19, 2011
Summary
The suprascapular notch (SSN) varies significantly in size and shape among Polish individuals, with five distinct types identified. This classification aids in understanding potential nerve entrapment and guides further imaging studies.
Area of Science:
- Orthopedic anatomy
- Surgical anatomy
- Radiological anatomy
Background:
- The suprascapular notch (SSN) morphology may influence suprascapular nerve entrapment.
- Understanding SSN variations is crucial for clinical diagnosis and treatment.
Purpose of the Study:
- To classify the suprascapular notch (SSN) variations in a Polish population.
- To establish a quantitative classification system for SSN morphology.
Main Methods:
- Analysis of 86 human scapulae using classical osteometry and digital photography.
- Measurement of maximal depth (MD), superior transverse diameter (STD), and middle transverse diameter (MTD) of the SSN.
- Classification into five types based on geometric parameters and subtypes.
Main Results:
- Five SSN types were identified: Type I (MD > STD) in 24.4%, Type II (MD = STD = MTD) in 2.3%, Type III (STD > MD) in 54.7%, Type IV (bony foramen) in 7%, and Type V (discrete notch) in 11.6%.
- Types I and III were further subclassified based on the relationship between MTD and STD.
- Ossification of the superior transverse scapular ligament (STSL) occurred in 7% completely and 23.3% partially.
Conclusions:
- A simple, quantitative classification of SSN types based on geometric parameters was established.
- This classification system can be applied to further investigations using computed tomography (CT) or ultrasonography.
- The observed ossification patterns of the STSL in the Polish population align with findings from other European countries.
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