Shoulder joint biomechanics
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This document discusses the biomechanics of the shoulder complex, which consists of four articulations: the glenohumeral, acromioclavicular, sternoclavicular, and scapulothoracic articulations. It describes the range of motion and key movements at each joint, including the rotations, gliding movements, and role of ligaments. Additionally, it discusses scapulohumeral rhythm and how the scapula and glenohumeral joint work together during arm movement. The major muscles acting on the shoulder joint are also reviewed.
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This document provides an overview of the anatomy of the shoulder, including bones, joints, ligaments, tendons, muscles, nerves and range of motion. It describes the key bones (humerus, scapula, clavicle, ribs, vertebrae), joints (glenohumeral, acromioclavicular, sternoclavicular, scapulothoracic) and muscles (deltoid, rotator cuff, latissimus dorsi, trapezius, serratus anterior, pectoralis) of the shoulder. It also discusses common shoulder injuries like rotator cuff tears, tendonitis and frozen shoulder, and examines physical exam tests and treatment approaches
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anatomy and biomechanics of Shoulder joint
The document provides an overview of the anatomy and biomechanics of the shoulder joint. It discusses the following key points:
1. The shoulder joint is formed by the articulation of the humerus, scapula, and clavicle. It includes the glenohumeral, acromioclavicular, sternoclavicular, and scapulothoracic joints.
2. The glenohumeral joint is a ball and socket synovial joint that allows a wide range of motion but is structurally weak. Its stability depends on static stabilizers like muscles, ligaments, labrum and dynamic stabilizers like the rotator cuff.
3.
Shoulder bio-mechanics
1. The shoulder is a ball and socket joint made up of multiple bones and joints that provide a wide range of motion but also instability.
2. Stability is achieved through bony anatomy, ligaments, muscles, and negative pressure within the joint.
3. Muscles act in force couples to produce motion through balanced contraction of agonists and antagonists.
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Shoulder joint biomechanics
- 1. Biomechanics of Shoulder complex Dr. Vivek Kumar Shrivastava Asso. Prof LNCT University Bhopal
- 2. Introduction Shoulder Complex (4 Articulations) •Glenohumeral Articulation •Acromioclavicular Articulation •Sternoclavicular Articulation •Scapulothoracic Articulation
- 3. Shoulder Complex (4 Articulations)
- 4. Kinematics of Shoulder Complex • ROM of Shoulder Complex • Flexion / Extension • Adduction / Abduction • Internal / External rotation • Scaption
- 5. Sternoclavicular Junction • Medial End of Clavicle and Superior lateral aspect of Manubrium
- 6. Sternoclavicular Joint Motion • Rotation • Elevation / Depression • Protraction / Retraction • Anterior / Posterior Rotation (50 / 10 Degree) • Translation • Superior / Inferior • Anterior / Posterior • Medial / Lateral
- 7. Acromioclavicular Joint • Lateral end of Clavicle and Acromion process of Scapula forms the Acromioclavicular Joint Which is a Synovial Joint • Ligaments- • Coracoacromial Ligament • Acromioclavicular Ligament • Coracoclavicular Ligament
- 9. Movements of AC Joint • Rotation- • Anterior / Posterior rotation • Anterior / Posterior Tipping • Upward / Downward Rotation • Glides • Anterior / Posterior • Superior / Inferior • Medial / Lateral
- 11. Role of Clavicle in Shoulder Joint Movement • For every 100 of Shoulder Elevation 40 of Clavicle rotation is noted
- 12. Glenohumeral Joint • Humeral head articulates with Scapular Glenoid Fossa to form Glenohumeral Joint
- 13. Anatomical Consideration of Proximal Humerus
- 16. Glenoid Labrum
- 17. Glenohumeral & Coracohumeral Ligaments • Glenohumeral Ligament • Superior GH Ligament • Middle GH Ligament • Inferior GH Ligament
- 20. Movement of Scapula • Upward Rotation (600) • Elevation / Depression • Protraction / Retraction
- 22. Scapulohumeral Rhythm • Full ROM of Shoulder joint is combination of All four joint, especially Glenohumeral joint and Scapulothoracic joint • GH Joint : ST Joint = 2:1 • For Every 20 of Shoulder Flexion or Abduction Scapula rotates 10 • Full ROM of Shoulder Joint 1800 = GH Joint 1200 + ST Joint 600 • 600 of ST joint Upward rotation = 300 SC Elevation + 300 AC Upward Rotation
- 25. Deltoid
- 27. Pectoralis Major
- 28. Biceps
- 29. Trapezius
- 30. Latissimus Dorsi
- 31. Levator Scapulae
- 32. Rhomboids