KIN 334 Muscles

Biceps brachii origins

-long head: supraglenoid tubercle of the scapula

-short head: coracoid process of the scapula

Brachialis origin

-anterior distal ½ humerus

Brachioradialis origin

-distal lateral supracondylar ridge of the humerus

Triceps brachii origin(s)

-long head: infraglenoid tubercle of the scapula

-lateral head: lateral posterior proximal ½ humerus

-medial head: medial posterior distal 2/3 humerus

Anconeus origin

lateral epicondyle of humerus (posteriorly)

Supination origin

-lateral epicondyle of the humerus

-superior posterior neighboring part of the ulna

Pronator Teres origin

-medial supracondylar ridge of the humerus

-coracoid process of the ulna

Pronator quadratus origin

Medial anterior distal ulna

Biceps brachii insertions

-radial tuberosity

-bicipital aponeurosis

Brachialis insertions(s)

-coracoid process of the ulna

-ulnar tuberosity

Brachioradialis insertion

radial styloid process (lateral side)

Triceps brachii insertion

olecranon process of ulna

Anconeus insertions

-olecranon process (lateral posterior)

-proximal ulna (superior posterior)

Supinator insertion

-lateral proximal radius

Pronator teres insertions

-middle lateral radius

Pronator quadratus insertion

-lateral anterior distal radius

Biceps brachii action(s)

-Flex elbow

-supinate forearm

Brachialis action

Flex elbow

Brachioradialis action

Flex elbow

Triceps brachii action

Extend elbow

Anconeus action

Stabilizes the elbow during pronation/supination

Supinator action

Supinates forearm

Pronator teres action

Pronate forearm

Pronator quadratura action

Pronate elbow