The Arm

Question 1

What are the parts of the humerous at the distal end that articulate with the radius and ulna?
What is the anterior fossa of the humerus?
What are the attachment areas next to the parts of question 1?
What is the posterior fossa?

Answer 1

Capitulum ( lateral)
Trochlea (medial)
Coronoid fossa. Ant. medial
Medial and lateral epicondyles.
Olecranon fossa (big fossa)

Question 2

What is the name of the articulating protuberance that attaches the ulna to the humerus?
What articulates with the tochlear groove?
What is the process that corresponds with part A?

Answer 2

Olecranon
Trochlear notch.
Coronoid process.

Question 3

What part of the forearm is most likely to dislocate?

Answer 3

The head of the radius.

Question 4

Brachial Region
Name the two compartments.
How many muscle each?
F?
N?

Answer 4

Anterior
3.
Flexors of arm at elbow.
Musculocutaneous n.

Posterior
Triceps brachii (one muscle, three heads)
Extensor of the forearm.
Radial n

Question 5

Biceps brachii
Head and attachments.
F?
N?

Answer 5

Long head: Supraglenoid tubercle of scapula,
Short head: Coracoid process.
Radial tuberosity. and Forearm Aponeurosis
Flexor and strong supinator of forearm. flex arm.
Musculocutaneous n.

Question 6

Brachialis
A?
F?
N?

Answer 6

Distal 1/2 of Anterior humerus
Intermuscular septae.
F: Powerful flexor of the forearm in all positions.
N: Musculocutaneous n.

Question 7

Coracobrachialis
A?
F?
N?

Answer 7

A: Coracoid process, Middle 1/3 of MEDIAL surface of humerus.
F: Flexor and adductor of arm (Glenohumeral joint) (anterior arm)
N: Musculocutaneous n.

Question 8

Triceps brachii
Heads and attachments?
F?
N?

Answer 8

Long head: Infraglenoid tubercle
Medial Head: Posterior surface of the humerus inferior to the radial groove
Lateral Head: Posterior surface of the humerus superior to the radial groove
Insert: Medial and lateral heads of the olecranon process on the ulna. common tendon insertion.
F: Extension of forearm. Long head Extension of shoulder.Accessory adductor
N: Radial n.

Question 9

Brachial artery
What is it a continuation of?
What are its terminal branches?
What is its main branch?
What do the minor branches do?

Answer 9

Axillary
RAdial and Ulnar terminal branch.
Profunda Brachii–largest
Very small art. assist in blood supply. Send blood around occlusions in elbow.

Question 10

Cubital Fossa
Where is it?
Shape?
Contents and significance?

Answer 10

Transition between arm and forearm.
Triangular depression.
Median cubital vein (IV punctures)
Brachial artery and two terminal branches.
Biceps tendon.

Question 11

Cubital fossa

Boundaries? 4

Answer 11

Biceps brachii.
Supinator and brachialis (Floor)
Brachioradialis
Pronator teres.

Question 12

Where do anterior humeral muscles insert?

Where do forearm muscles originate?

Answer 12

Radius and Ulna

Humerus.

Question 13

What is the name of the fascia that separates the upper arm muscles anterior from posterior.

Answer 13

Lateral and Medial Intermuscular septum

Question 14

What are the six borders and surfaces of the humerus?

Answer 14

Anterior border
Anterolateral surface
Lateral border
Posterior surface
Medial border
Anteromedial surface

Question 15

What are the 3 landmarks of interest on the radial bone concerning the humerus?

Answer 15

Head
Neck
Radial tuberosity.

Question 16

What are the landmarks of interest on the ulna concerning the humerus?

Answer 16

Olecranon
Coronoid process
Trochlear notch
Radial notch
Tuberosity of ulna

Question 17

Name the landmarks of the Humerus

Answer 17

Head
Anatomical neck
Greater tubercle
Lesser tubercle
Intertubercular sulcus
Surgical neck
Anterolateral surface
Anteromedial surface
Coracobrachialis insertion
Deltoid tubercle
Radial groovee
Medial supracondylar ridge
Medial epicondyle
Lateral supracondylar ridge
Lateral epicondyle
Trachlear/Coronoid fossa of ulna
Radial fossa
Olecranon fossa
Capitulum (art for radius)
Trochlea (art for ulna)
Groove for ulnar nerve

Question 18

What is the most common tendon to rupture in the arm?

What does this cause and what is its nickname?

Answer 18

Tendon of the long head of the biceps brachii muscle. Little effect on the upper limb. When the elbow flexes, the unrestrained fibers contract to form a bulge called the “Popeye” sign.