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Sternoclavicular Joint

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Sternoclavicular Joint Sternoclavicular Joint Interclavicular ligament Clavicle Clavicle Sternoclavicular Articular Chapter 7 ligament disk Costoclavicular Costal ligament cartilage (1st rib) Sternum Biomechanics of the Human Upper Extremity modified ball and socket joint between the proximal clavicle and the manubrium of the sternum Acromioclavicular Joint Coracoclavicular Joint Coracoclavicular Acromioclavicular Coracoclavicular joint ligament Coracoclavicular Acromioclavicular Coracoclavicular Clavicle ligament joint Acromion process Clavicle Clavicle ligament ligament Acromion process Clavicle Coracoacromial Scapular ligament spine Coracoacromial Scapular Verterbal ligament spine border Coracoid process Vertebral Verterbal border border Coracoid process Vertebral Glenoid fossa border Inferior Glenoid fossa Axillary border angle Inferior Axillary border angle Anterior view Inferior angle Posterior view Anterior view Inferior angle Posterior view syndesmosis with the coracoid process of irregular joint between the acromion process the scapula bound to the inferior clavicle of the scapula and the distal clavicle by the coracoclavicular ligament Glenohumeral Joint Scapulothoracic Joint Coracoid process Acromion process Coracohumeral ligament Long head of Scapula biceps Humerus Articular capsule ball and socket joint in which the head of the articulation between the anterior scapula humerus articulates with the glenoid fossa and the thoracic wall of the scapula 1 Scapulohumeral Rhythm Glenohumeral Flexors Muscles contributing to flexion at the glenohumeral joint • anterior deltoid • clavicular pectoralis major • assisted by: • coracobrachialis regular pattern of scapular rotation that • short head of biceps brachii accompanies and facilitates humeral abduction Glenohumeral Extensors Glenohumeral Abductors Muscles contributing to extension at the glenohumeral joint • sternal pectoralis major • middle deltoid • latissimus dorsi • supraspinatus • teres major • assisted by: • long head of triceps brachii Glenohumeral Adductors Glenohumeral Medial Rotators • subscapularis • latissimus dorsi • teres major • teres major • assisted by: • sternocostal pectoralis • pectoralis major • assisted by: • anterior deltoid • latissimus dorsi • short head of biceps brachii • short head of biceps brachii • long head of triceps brachii 2 Lateral Rotators of the Horizontal Adduction of the Humerus Humerus • infraspinatus • pectoralis major • teres minor • anterior deltoid • assisted by: • coracobrachialis • posterior deltoid • assisted by: • short head of biceps brachii Horizontal abduction of the humerus? Humeroulnar Joint • infraspinatus • middle and posterior deltoid • hinge joint in which the humeral • teres minor trochlea articulates with the trochlear • assisted by: fossa of the ulna • teres major • latissimus dorsi • considered to be the elbow joint Humeroradial Joint Radioulnar Joints • the proximal and distal radioulnar joints are pivot joints • the middle radioulnar joint is a gliding joint in which the capitellum of the syndesmosis humerus articulates with the proximal end of the radius 3 Elbow Flexors Elbow Extensors • triceps brachii • brachialis • assisted by: • biceps brachii • anconeus • brachioradialis Radiocarpal Joints Retinacula • condyloid articulations between the radius and the three carpal bones these fibrous bands of fascia form protective passageways through which • (these joints comprise the wrist) tendons, nerves, and blood vessels pass Wrist Flexors Wrist Extensors • flexor carpi radialis • extensor carpi radialis longus • flexor carpi ulnaris • extensor carpi radialis brevis • palmaris longus • extensor carpi ulnaris • assisted by: • assisted by: • flexor digitorum superficialis • other wrist extensor muscles • flexor digitorum profundus 4 Carpometacarpal Joints Intermetacarpal Joints • the carpometacarpal joint of the thumb irregular joints between the metacarpals is a saddle joint that share joint capsules with the • the other carpometacarpal joints are carpometacarpal joints gliding joints Metacarpophalangeal Joints Interphalangeal Joints the proximal and distal interphalangeal • condyloid joints between the rounded joints of the fingers and the single distal heads of the metacarpals and interphalangeal joint of the thumb are all the concave proximal ends of the hinge joints) phalanges • these joints form the knuckles of the hand Metacarpophalangeal Joints 2-5 Hand Muscles Motions • flexion • there are nine extrinsic muscles with • extension attachments both proximal and • abduction distal to the wrist • adduction • there are ten intrinsic muscles with • circumduction both attachments distal to the wrist 5.
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