Rotator cable in pathological shoulders: comparison with normal anatomy in a cadaveric study

Łukasz Olewnik,Piotr Grzelak,Michał Polguj,Mirosław Topol,Michał Tomasz Podgórski

doi:10.1007/s12565-018-0447-9

Łukasz Olewnik, Piotr Grzelak + Show 3 more

Open Access

https://doi.org/10.1007/s12565-018-0447-9

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Abstract

The rotator cable is a semicircular thickening of the glenohumeral joint capsule. It travels between tubercles of the humerus and interweaves with the supra- and infraspinatus muscle tendons. The rotator cable anchors these tendons to the tubercles, playing the role of a suspension bridge. However, little is known about the modifications of this cable that result from pathologies to the rotator cuff tendons. Thus, we aim to compare the morphology of the normal rotator cable with cables in specimens with rotator cuff injuries. The glenohumeral joint was dissected in 30 cadaveric shoulders. The supra-, infraspinatus and teres minor muscles were inspected for injuries and the rotator cable was visualised. The cables course was determined and the width, length and thickness were measured. The rotator cable was found present in all cadavers dissected. In three specimens there was a partial injury of the supraspinatus tendon (two from capsular side and one from bursal side). The rotator cable was thickened in the cases of capsular tears. In another two specimens the supraspinatus and infraspinatus muscles were torn completely and in these cases the rotator cable was blended with retracted stumps and elongated to the level of the glenoid rim. The rotator cable creates a functional complex with the supra- and infrasinatus muscles. The morphology of the cable differs in cases of rotator cuff injury.

Highlights

Distal parts of the supra- and infraspinatus muscles are tightly bonded with the glenohumeral joint capsule (Czyrny 2012; Pouliart et al 2007)
Afterwards, tendons of muscles were separated from the joint capsule up to the anatomic neck of the humerus to visualize the whole extent of the rotator cable
As it has been reported in macroscopic (Burkhart et al 1993; Rahu et al 2016) and microscopic (Fallon et al 2002) studies, and as we confirmed in normal and pathological specimens, rotator cables form a functional complex with the supra- and infraspinatus muscles

Summary

Introduction

Distal parts of the supra- and infraspinatus muscles are tightly bonded with the glenohumeral joint capsule (Czyrny 2012; Pouliart et al 2007) In this region there is a crescent of fibres perpendicular to the axis of tendons that runs from the intertubercular groove to the posterior aspect of the greater tubercle. This structure has been described by many authors by different names. It is most well known as the “rotator cable” (Burkhart et al 1993) or the “ligamentum semicirculare humeri” (Kolts et al 2000). According to Burkhart et al (1993)

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