Differences
This shows you the differences between two versions of the page.
| en:shoulder_joint [2023/06/21 10:21] – brahmantra | en:shoulder_joint [] () – - () 127.0.0.1 | ||
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| - | ====== SHOULDER JOINT ====== | ||
| - | * Shoulder joint | ||
| - | * Type | ||
| - | * Ball and socket , synovial | ||
| - | * Articular surface | ||
| - | * Glenoid cavity of scapula | ||
| - | * Head of humerus | ||
| - | * Features | ||
| - | * Weak joint | ||
| - | * Due to small and shallow to hold head of humerus in place | ||
| - | * But permits great mobility | ||
| - | * Stability factors | ||
| - | * 1. Coraclacromial arch or secondayr socket for head of humrus | ||
| - | * 2. Musculotendinous cuff | ||
| - | * 3. Glenoidal labrum helps in deeping glenoid fossa | ||
| - | * 4. Muscles attaching humerus to pectoral girdle | ||
| - | * 5. Atmospheric presure | ||
| - | * Ligaments | ||
| - | * Capsular ligament | ||
| - | * Very loose , | ||
| - | * permits free movements , | ||
| - | * least supported | ||
| - | * Inferiorly , where dislocation common | ||
| - | * May damage axillary nerve | ||
| - | * Medially | ||
| - | * Attached to scapula beyond supraglenoid tubercle and margins of labrum | ||
| - | * Laterally | ||
| - | * Attached to anatomical neck of humerus | ||
| - | * Exception | ||
| - | * Inferiorly attachment extends to surgical neck | ||
| - | * Superiorly - deificient for passage of long head of tendon of biceps brachi | ||
| - | * Anteriorly | ||
| - | * Glenohumeral ligaments. | ||
| - | * Superior , middle and inferior | ||
| - | * Area between superior and inferior glenohumeral ligament is a point of weakness in capsule ( foramen of weitbrecht ) | ||
| - | * Anterior dislocation of humeral head | ||
| - | * Capsule lined by synovial membrane | ||
| - | * An extension of this forms a tubular sheath for tendon of long head of biceps brachii | ||
| - | * Coracohumeral ligament | ||
| - | | ||
| - | * From root of coracoid process to neck of humerus opposite greater tubercle | ||
| - | * Gives strength to capsule | ||
| - | * Transverse humeral ligament | ||
| - | * Bridges upper part of bicipital groove of humerus | ||
| - | * Between greater and lesser tubercle | ||
| - | * Tendons passes deep to it | ||
| - | * Glenoidal labrum | ||
| - | * Fibrocartilaginous rim | ||
| - | * covers margins of glenoid cavity | ||
| - | * Bursae | ||
| - | * Subacromial or deltoid bursa (A) | ||
| - | * Subscaoularis bursa (B) | ||
| - | * Infraspinatus bursa | ||
| - | * A and B are commonly continuous with each other but may be separate | ||
| - | * Relations | ||
| - | * Superiorly - coraclacromial bursa , subacromial bursa , supraspinatus , deltoid | ||
| - | * Inferiorly - long head of triceps , axillary nerves , posterior circumflex humeral artery | ||
| - | * Anteriroyl - subscaoularis , coracobrahialis, | ||
| - | * Posteriorly - infraspinatus , teres minor , deltoid | ||
| - | * Within joint - tendon of long head of biceps brachii | ||
| - | * Blood supply - | ||
| - | * Anterior circumflex humeral vessels | ||
| - | * Posterior circumflex humeral vessels | ||
| - | * Suorascapular vessels | ||
| - | * Subscapular vessels | ||
| - | * Nerve supply | ||
| - | * Axillary nerve | ||
| - | * Musculocutaneous nerve | ||
| - | * Suorascapular nerve | ||
| - | * Movements | ||
| - | * Flexion | ||
| - | * Extension | ||
| - | * Parallel to glenoid cavity | ||
| - | * Adduction | ||
| - | * Abduction | ||
| - | * Medial rotation | ||
| - | * Lateral rottation | ||
| - | * Circumduction | ||
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| - | ^ | ||
| - | | Type | Synovial ball and socket joint; multiaxial | ||
| - | | Articular surfaces | ||
| - | | Ligaments | ||
| - | | Innervation | ||
| - | | Blood supply | ||
| - | | Movements | ||
| - | | Rotator cuff muscles | ||
| - | | | Mnemonic: Rotator cuff SITS on the shoulder | ||