deltoid abducts the shoulder posterior deltoid extends the shoulder anterior deltoid flexes the...
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Deltoid
Abducts the shoulderPosterior deltoid extends the shoulder
Anterior deltoid flexes the shoulder
Biceps Brachii
• Flexes the elbow • Supination of the forearm and shoulder
Brachioradialis
• Flexes the elbow
Origin: infraspinatus fossa of scapula
Insertion: Greater tubercle of the humerus
Action: Lateral rotation of the shoulder (humerus), horizontal adduction of the humerus (shoulder)
Infraspinatus Muscle
Supraspinatus
Origin: Supraspinatus fossa of the scapula
Insertion: The greater tubercle of the humerus
Action: Abduction of the shoulder (humerus) and stabilizes the shoulder joint
Flexor Carpi Ulnaris
Origin: medial epicondyle of humerus and olecranon process of ulna
Insertion: Base of the fifth metacarpal
Action: Flexes wrist; acts with Extensor carpi ulnaris to adduct wrist
Teres minor: lateral (external) rotation of humerus
Extensor carpi ulnaris: extends and adducts the wristFlexor carpi ulnaris: flexes wrist and abducts the wrist
Extersor carpi ulnaris Flexor carpi
ulnaris
Extersor carpi ulnaris
Flexor carpi ulnaris
Triceps brachii: extends elbow and shoulder
Trapezius
Elevates, depresses, and retracts the scapula. When they both act together, draws head dorsally (backwards).
Latissimus Dorsi
Adducts and extends the shoulder (humerus)Rotates the shoulder (humerus)Draws the shoulder down and backward.
Extensor Carpi Radialis
Extends and abducts the wrist.Acts with the flexor carpi radialis to abduct the wrist.
Subscapularis: Medial internal and lateral external rotation of the humorous bone; stabilizes shoulder
Brachialis: flexes elbow
Flexor Carpi Radialis: flexes and abducts wrist
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