Muscles that move the elbow

Question 1

Where do the long head and short head of the biceps brachii attach at the shoulder, and where do they attach when they have converged?

Answer 1

Long head: Supraglenoid tubercle of the scapula
Short Head: Coracoid Process
Both converge and attach to the radial tuberosity

Question 2

What 4 actions does the biceps brachii perform?

Answer 2

Flexion at the elbow, Internal rotation of the humerus, supination and abduction

Question 3

What nerve supplies innervation to the biceps brachii?

Answer 3

Musculocutaneous nerve

Question 4

Points of attachment and action of the brachialis muscle?

Answer 4

Distal anterior surface of the humerus, to the coronoid process of the ulna
Action: Flexion of the elbow joint to flex the forearm

Question 5

Points of attachment and action of the Brachioradialis

Answer 5

Half way up the humerus, just below the deltoid tuberosity, to the lateral part of the styloid process of the radius

Question 6

What three branches form the triceps muscle?

Answer 6

The lateral, long and medius triceps brachii

Question 7

Points of attachment and action of the long head of the triceps brachii

Answer 7

Infraglenoid fossa of the scapula to the olecranon process of the ulna
Action: Extension and adduction of the shoulder joint, and extension of the elbow joint

Question 8

Points of attachment and action of the Lateral head of the triceps brachii

Answer 8

High up on the lateral side of the posterior humerus to the olecranon fossa
Action: Extension of the shoulder, adduction and extension of the elbow joint

Question 9

Points of attachment and action of the medius head of the triceps brachii

Answer 9

posterior surface of the humerus, below the radial groove to the olecranon process on the ulna
Action: Extension and adduction of the shoulder joint. Extension of the elbow joint

Question 10

Where do the three triceps heads converge and attach to?

Answer 10

The olecranon process of the ulna

Question 11

Which nerve runs between the lateral and medial heads of the triceps?

Answer 11

The radial nerve

Question 12

What is the name of the other minor elbow extensor and where are its points of attachment?

Answer 12

Anconeus.

Lateral epicondyle to the lateral side of the olecranon and the superior part of the posterior ulna