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Shoulder/Elbow/Wrist

O/I/A of shoulder/elbow/wrist joint muscles

QuestionAnswer
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
Created by: esfahans