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