Muscles of the Brachium

Question 1

Biceps Brachii

Answer 1

O (Short Head) : Apex of the coracoid process of the scapula
O (Long Head) : Supraglenoid tubercle of the scapula
I : Tuberosity of the radius and the aponeurosis of biceps brachii
A :
1. Flex the forearm at the elbow joint
2. Supinates the forearm at the ru joint
3. Flexes the arm at the gh joint

Question 2

Brachialis

Answer 2

O : Distal 1/2 of the anterior shaft of the humerus
I : Tuberosity and coronoid process of the ulna
A : Flexes the forearm arm at the elbow joint

Question 3

Coracobrachialis

Answer 3

O : Apex of the coracoid process of the scapula
I : Middle 1/3 of the middle shaft of the humerus
A :
1. Flexes the arm at the Gh joint
2. Adduct the arm at the Gh joint

Question 4

Triceps Brachii

Answer 4

O (Long Head) : Infraglenoid tubercle of the scapula
O (Lateral Head) : Posterior surface of the proximal 1/3 of the humerus
O (Medial Head) : Posterior surface of distal 2/3 of the humerus
I : Olecranon process of the ulna
A :
1. Extend the arm at the GH joint
2. Extend the forearm at the elbow joint

Question 5

Anconeus

Answer 5

O : Lateral epicondyle of the humerus
I : Lateral side of the olecranon process and proximal 1/4 of the posterior ulna
A : Extend the forearm at the elbow joint