Muscles Of The Elbow Complex

Question 1

Biceps brachii

Answer 1

Origin-
Long head- supraglenoid tubercle of the scapula
Short head- coracoid process of the scapula

Insertion- radial tuberosity

Functions- flexes the forearm at the elbow joint
Supinates the forearm at the RU joint
Flexes at arm at the GH joint

Question 2

Brachialis

Answer 2

Attachment- distal 1/2 of the anterior shaft of the humerus

Insertion- ulnar tuberosity

Functions- flexes the forearm at the elbow joint

Question 3

Brachioradialis

Answer 3

Origin- lateral supracondylar ridge of the humerus

Insertion- styloid process of the radius

Functions- flexes the forearm at the elbow joint
Supinates the forearm at the RU joint
Pronates the forearm at the RU joint

Question 4

Triceps brachii

Answer 4

Origin-
Long head- infraglenoid tubercle of the scapula
Lateral head- posterior shaft of the humerus
Medial head- posterior shaft of the humerus

Insertion- olecranon process of the ulna

Functions-
Extends the forearm at the elbow joint
Extends the arm at the GH joint

Question 5

Pronator teres

Answer 5

Origin-
Humeral head- medial epicondyle of the humerus
Ulnar head- coronoid process of the ulna

Insertion- lateral radius

Functions- pronates the forearm at the RU joint
Flexes the forearm at the elbow joint