Elbow & Forearm Muscles Flashcards
Biceps Brachii - Origin - 2 heads
O=
Short head - Coracoid Process of the Scapula
Long head - Supraglenoid Tubercle of the scapula
Biceps Brachii - Insertion
I=
Radial Tuberosity of the Radius
Biceps Brachii - Actions
Elbow joint flexion
Forearm supernation
Brachialis - Origin
O= Humerus - Anterior surface of distal humerus
Brachialis - Insertion
I= Ulna - Coranoid process and tuberosity
Brachialis - Actions
Elbow joint flexion
Brachioradialis - Origin
O= Lateral supracondyle ridge of the Humerus
Brachioradialis - Insertion
I= Lateral surface of distal end of Radius
Brachioradialis - Action
Elbow Flexion
Triceps Brachii - Origin - 3 Heads
O=
Medial Head - Humerus - Bottom 1/3 posterior shaft
Lateral Head - Humerus - Top 1/3, above radial groove
Long Head - Scapula - Infraglenoid Tubercle
Triceps Brachii - Insertion
I=
Ulna - Olecreon of the Ulna
Triceps Brachii - Actions
Elbow Extension
Assists with Shoulder Extension (Long head attaches to scapula)
Anconeus - Origin
O=
Lateral Epicondyle of the Humerus
Anconeus - Insertion
I=
Ulna - Lateral aspect of olecron and superior posterior surface
Anconeus - Action
Assists with elbow extension
Supinator - Origin
O= Humerus - lateral epicondyle
Supinator - Insertion
I= Radius - Proximal 1/3
Supinator - Actions
Assists with Supination
Pronator Teres - Origin
O= Humerus - Medial epicondyle & Ulna - Coronoid process
Pronator Teres - Insertion
I= Radius - Medial 1/3
Pronator Teres - Actions
Elbow Pronation
Pronator Quadratus - Origin
O= Ulna - Medial
Pronator Quadratus - Insertion
I= Radius - Distal
Pronator Quadratus - Actions
Elbow Pronation
