Upper Arm and Elbow

Question 1

Ulnohumeral Joint

Answer 1

Formed by the trochlea and the trochlear notch of the humerus

Question 2

Radiohumeral joint

Answer 2

Formed by the radial head and the capitulum

Question 3

Proximal radioulnar joint

Answer 3

Formed by the radial notch of the ulna and the radial head

Question 4

Biceps brachii short head Proximal attachment

Answer 4

Tip of the coracoid process of the scapula

Question 5

Biceps brachii long head proximal attachment

Answer 5

Supraglenoid tubercle of the scapula (above the glenoid fossa)

Question 6

Distal attachment of the biceps

Answer 6

Tuberosity of radius via the bicipital aponeurosis

Question 7

The innervation of the Biceps brachii

Answer 7

musculocutaneous nerve (C5, C6)

Question 8

Main actions of the biceps

Answer 8

Supinates forearm, flexes elbow joint (when supinated) and shoulder joint

Question 9

Proximal Attachment of the Brachialis

Answer 9

Distal half of anterior surface of humerus

Question 10

Distal attachment of brachialis

Answer 10

Coronoid process and tuberosity of ulna

Question 11

Innervation of Brachialis

Answer 11

Musculocutaneous nerve (C5, C6)

Question 12

Main actions of the Brachialis

Answer 12

Flexes elbow joint most active in pronation (all positions)

Question 13

Proximal Attachment of Coracobrachialis

Answer 13

Coracoid process of scapula

Question 14

Distal attachment of the coracobrachialis

Answer 14

Middle third of medial surface of humerus

Question 15

Innervation of the Coracobrachialis

Answer 15

Musculocutaneous nerve (C5, C6, C7)

Question 16

Actions of the Coracobrachialis

Answer 16

Helps flex and adduct shoulder joint

Question 17

Brachioradialis

Answer 17

Drinking muscle (flexes forearm)

Question 18

Triceps proximal attachment (Long head + Lateral head + Medial head)

Answer 18

Long head - Infraglenoid tubercle (of scapula)
Lateral head - posterior surface of humerus
Medial head - posterior surface of humerus

Question 19

Distal attachment of the triceps

Answer 19

Olecranon

Question 20

innervation of triceps

Answer 20

Radial nerve (C6, C7, C8)

Question 21

Main actions of the Triceps

Answer 21

Extensor of elbow, long head extends shoulder joint

Question 22

What are the posterior muscles that support the elbow

Answer 22

Triceps and Anconeus

Question 23

What are the anterior muscles that support the elbow

Answer 23

Biceps, brachialis, coracobrachialis, and brachioradialis

Question 24

What is the cubital tunnel

Answer 24

a narrow passageway in the elbow that contains the ulnar nerve and ulnar artery (palpated between the olecranon medial epicondyle)