Related Experiment Video
Updated: Apr 17, 2026
10:07
Measurement of Dynamic Scapular Kinematics Using an Acromion Marker Cluster to Minimize Skin Movement Artifact
Published on: February 10, 2015
20.2K
Association between scapula bony morphology and snapping scapula syndrome
Ulrich J Spiegl1, Maximilian Petri1, Sean W Smith2
1Steadman Philippon Research Institute, Vail, CO, USA; The Steadman Clinic, Vail, CO, USA.
Journal of Shoulder and Elbow Surgery
|February 19, 2015
Summary
Scapular incongruity, specifically anterior angulation of the medial scapula (MSCA), is linked to snapping scapula syndrome (SSS). Concave scapular shape and positive MSCA significantly increase SSS risk, aiding surgical planning.
Area of Science:
- Orthopedic Surgery
- Radiology
- Anatomy
Background:
- Scapular incongruity is a suspected cause of snapping scapula syndrome (SSS).
- Understanding scapular bony morphology's role in SSS is crucial for diagnosis and treatment.
Purpose of the Study:
- To investigate the association between scapular bony morphology, assessed via MRI, and the diagnosis of SSS.
- To determine if specific scapular shapes or angles correlate with SSS.
Main Methods:
- Retrospective case-control study of 26 SSS patients and 19 controls.
- Evaluation of scapular bony morphology on MRI, measuring the medial scapula corpus angle (MSCA).
- Categorization of scapulae as straight, S-shaped, or concave, with inter/intraobserver reliability assessment.
Main Results:
- Concave scapular morphology was exclusively found in SSS patients.
- Significant differences in mean MSCA between SSS (14.4°) and non-SSS (-3.3°) shoulders (P = .001).
- Decreased scapulothoracic distance in SSS patients (14.9 mm vs. 24.0 mm).
Conclusions:
- Anterior angulation of the medial scapula (positive MSCA) is associated with SSS.
- Concave scapula and positive MSCA confer a 12-fold increased risk of SSS.
- MSCA may assist in planning scapular resections for SSS treatment.
Keywords:
Snapping scapula syndromemedial scapula corpus anglepartial scapulectomyscapula bony morphologyMore Related Videos
Related Concept Videos
01:23Muscles of the Shoulder
12.1K
The muscles surrounding the shoulder girdle, including the clavicle and scapula, primarily stabilize the scapula. This stable base allows other muscles to move the humerus effectively. Scapular movements often mirror those of the humerus and extend its range of motion. For instance, raising the arm above the head would not be feasible without simultaneous upward rotation of the scapula.
Anterior Thoracic Muscles
The anterior thoracic muscles include the serratus anterior, subclavius, and...
Anterior Thoracic Muscles
The anterior thoracic muscles include the serratus anterior, subclavius, and...
12.1K
01:31Muscles that Move the Arm
6.3K
Nine muscles are involved in arm movements. Two of these, the pectoralis major and latissimus dorsi, originate from the axial skeleton and are called axial muscles. The other seven originate from the scapula and are called the scapular muscles.
The pectoralis major has two origins. Its clavicular head originates on the medial half of the clavicle. In contrast, the sternocostal head originates on the costal cartilages of ribs 1-6, the sternum, and the aponeurosis of the external oblique of the...
The pectoralis major has two origins. Its clavicular head originates on the medial half of the clavicle. In contrast, the sternocostal head originates on the costal cartilages of ribs 1-6, the sternum, and the aponeurosis of the external oblique of the...
6.3K
01:09Changes in the Appendicular Skeleton with Age
4.1K
The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...
4.1K