click below
click below
Normal Size Small Size show me how
Shoulder/Elbow/Wrist
O/I/A of shoulder/elbow/wrist joint muscles
Question | Answer |
---|---|
Upper Trapezius Origin | Occipital bone, nuchal ligament on cervical spinous processes |
Upper Trapezius Insertion | Outer 3rd of clavicle, acromion process |
Upper Trapezius Action | Scapular elevation and upward rotation |
Middle Trapezius Origin | Spinous processes of C7-T3 |
Middle Trapezius Insertion | Scapular Spine |
Middle Trapezius Action | Scapular retraction |
Lower Trapezius Origin | Spinous processes of middle and lower thoracic vertebrae |
Lower Trapezius Insertion | Base of scapular spine |
Lower Trapezius Action | Scapular depression and upward rotation |
Levator Scapula Origin | Transverse processes of first 4 cervical vertebrae |
Levator Scapula Insertion | Vertebral border of scapula between the superior angle and spine |
Levator Scapula Action | Scapular elevation and downward rotation |
Rhomboids Origin | Spinous processes of C7-T5 |
Rhomboids Insertion | Vertebral border of scapula between spine and inferior angle |
Rhomboids Action | Scapular retraction, elevation, and downward rotation |
Serratus Anterior Origin | Lateral surface of upper eight ribs |
Serratus Anterior Insertion | Vertebral border of scapula, anterior surface |
Serratus Anterior Action | Scapular protraction and upward rotation |
Pectoralis Minor Origin | Anterior surface ribs 3-5 |
Pectoralis Minor Insertion | Coracoid process of scapula |
Pectoralis Minor Action | Scapular depression, protraction, downward rotation and tilt |
Anterior Deltoid Origin | Lateral 3rd of clavicle |
Anterior Deltoid Insertion | Deltoid tuberosity |
Anterior Deltoid Action | Shoulder abduction, flexion, medial rotation, and horizontal adduction |
Middle Deltoid Origin | Acromion porcess |
Middle Deltoid Insertion | Deltoid tuberosity |
Middle Deltoid Action | Shoulder abduction |
Posterior Deltoid Origin | Spine of scapula |
Posterior Deltoid Insertion | Deltoid tuberosity |
Posterior Deltoid Action | Shoulder abduction, extension, hyperextension, lateral rotation, horizontal abduction |
Supraspinatus Origin | Supraspinous fossa of scapula |
Supraspinatus Insertion | Greater tubercle of humerus |
Supraspinatus Action | Shoulder abduction |
Pectoralis Major-clavicular Origin | Medial 3rd of clavicle |
Pectoralis Major-clavicular Insertion | Lateral lip of bicipital groove of humerus |
Pectoralis Major-clavicular Action | Shoulder flexion-to 90 degrees |
Pectoralis Major-sternal Origin | Sternum, costal cartilage of first 6 ribs |
Pectoralis Major-sternal Insertion | Lateral lip of bicipital groove of humerus |
Pectoralis Major-sternal Action | Shoulder extension from 90 degrees to anatomical position |
Latissimus Dorsi Origin | Spinous processes of T7-L5, posterior surface of sacrum, iliac crest and lower 3 ribs |
Latissimus Dorsi Insertion | Medial lip of bicipital groove of humerus |
Latissimus Dorsi Action | Shoulder extension, adduction, medial rotation, hyperextension |
Teres Major Origin | Axillary border of scapula near the inferior angle |
Teres Major Insertion | Crest below lesser tubercle of humerus |
Teres Major Action | Shoulder extension, adduction, medial rotation |
Infraspinatus Origin | Infraspinous fossa of scapula |
Infraspinatus Insertion | Greater tubercle of humerus |
Infraspinatus Action | Shoulder lateral rotation, horizonal abduction |
Teres Minor Origin | Axillary border of scapula |
Teres Minor Insertion | Greater tubercle of humerus |
Teres Minor Action | Shoulder lateral rotation, horizonal abduction |
Subscapularis Origin | Subscapular fossa of the scapula |
Subscapularis Insertion | Lesser tubercle of humerus |
Subscapularis Action | Shoulder medial rotation |
Coracobrachialis Origin | Coracoid process of scapula |
Coracobrachialis Insertion | Medial surface of humerus near the midpoint |
Coracobrachialis Action | [shoulder joint flexion], [adduction], stabilizes shoulder joint |
Brachialis Origin | Distal half of humerus, anterior surface |
Brachialis Insertion | Coranoid process and ulnar tuberosity of ulna |
Brachialis Action | Elbow flexion |
Biceps Brachii Origin | Long Head-supraglenoid tubercle, short head-coracoid process |
Biceps Brachii Insertion | Radial tuberosity of radius |
Biceps Brachii Action | Elbow flexion, forearm supination, [shoulder flexion] |
Brachioradialis Origin | Lateral supracondylar ridge on the humerus |
Brachioradialis Insertion | Styloid process of the radius |
Brachioradialis Action | Elbow flexion |
Triceps Origin | Long Head-infraglenoid tubercle, lateral head-inferior to greater tubercle, medial-posterior surface of humerus |
Triceps Insertion | olecranon process of ulna |
Triceps Action | Elbow extension |
Anconeus Origin | Lateral epicondyle of humerus |
Anconeus Insertion | Lateral and inferior to olecranon process of ulna |
Anconeus Action | No joint action, [elbow extension] |
Pronator Teres Origin | Medial epicondyle of humerus and coronoid process of ulna |
Pronator Teres Insertion | Lateral aspect of radius at its midpoint |
Pronator Teres Action | Forearm pronation |
Pronator Quadratus Origin | Distal 1/4 of ulna |
Pronator Quadratus Insertion | Distal 1/4 of radius |
Pronator Quadratus Action | Forearm pronation |
Supinator Origin | Lateral epicondyle of humerus and adjacent ulna |
Supinator Insertion | Anterior surface of the proximal radius |
Supinator Action | Forearm supination |
Flexor Carpi Ulnaris Origin | Medial epicondyle of humerus |
Flexor Carpi Ulnaris Insertion | Pisiform and base of 5th metacarpal |
Flexor Carpi Ulnaris Action | Wrist flexion, ulnar deviation |
Flexor Carpi Radialis Origin | Medial epicondyle of humerus |
Flexor Carpi Radialis Insertion | Base of 2nd and 3rd metacarpals |
Flexor Carpi Radialis Action | Wrist flexion, radial deviation |
Palmaris Longus Origin | Medial epicondyle of humerus |
Palmaris Longus Insertion | Palmar facia |
Palmaris Longus Action | [wrist flexion] |
Extensor Carpi Radialis Longus Origin | Supracondylar ridge of humerus |
Extensor Carpi Radialis Longus Insertion | Base of 2nd metacarpal |
Extensor Carpi Radialis Longus Action | Wrist extension, radial deviation |
Extensor Carpi Radialis Brevis Origin | Lateral epicondyle of humerus |
Extensor Carpi Radialis Brevis Insertion | Base of 3rd metacarpal |
Extensor Carpi Radialis Brevis Action | Wrist extension, [radial deviation] |
Extensor Carpi Ulnaris Origin | Lateral epicondyle of humerus |
Extensor Carpi Ulnaris Insertion | Base of 5th metacarpal |
Extensor Carpi Ulnaris Action | Wrist extension, ulnar deviation |