2.1.1. The Humerus

Question 1

Where is the Humerus found?

Answer 1

The Upper Arm

Question 2

What does the Humerus join?

Answer 2

1. The Glenohumeral Joint (Shoulder)

2. The Forearm

Question 3

What does the Proximal part of the Humerus articulate with?

Answer 3

The Glenoid Fossa of the Scapula

Question 4

What does the Distal part of the Humerus articulate with?

Answer 4

The Forearm Bones, to form the Elbow Joint

Question 5

What 2 Forearm Bones does the Humerus articulate with?

Answer 5

1. Radius

2. Ulnar

Question 6

1. What does the Humerus act as?

2. What does this result in?

Answer 6

1. An attachment site for Muscles and Ligaments

2. Various Raised and Roughening on the Bony Surface

Question 7

What are the 6 important Proximal Features of the Humerus?

Answer 7

1. The Head of the Humerus
2. The Anatomical Neck of the Humerus
3. The Surgical Neck of the Humerus
4. The Greater Tubercle of the Humerus
5. The Lesser Tubercle of the Humerus
6. The Intertubercular Sulcus

Question 8

What connects the Head to the Greater and Lesser Tubercles of the Humerus?

Answer 8

The Anatomical Neck

Question 9

How is the Anatomical Neck of the Humerus described?

Answer 9

Short and Nondescript (trick question)

Question 10

Where is the Greater Tubercle located on the Humerus?

Answer 10

Laterally

Question 11

1. How many Faces does the Greater Tubercle of the Humerus have?
2. What are they?

Answer 11

1. 2
2. a) Anterior Face
3. b) Posterior Face

Question 12

What is the function of the Greater Tubercle of the Humerus?

Answer 12

It serves as an Attachment Site for 3 of the Rotator Cuff Muscles:

1. Supraspinatus
2. Infraspinatus
3. Teres Minor

Question 13

Where is the Lesser Tubercle located on the Humerus?

Answer 13

Medially to the Greater Tubercle of the Humerus

Question 14

1. How many Face does the Lesser Tubercle of the Humerus have?
2. What are they?

Answer 14

1. 1

2. An Anterior Face

Question 15

What is the function of the Lesser Tubercle of the Humerus?

Answer 15

It serves as an Attachment Site for a Rotator Cuff Muscle:

Subscapularis

Question 16

What separates the Greater and Lesser Tubercles of the Humerus?

Answer 16

The Intertubercular Sulcus (Groove)

Question 17

What runs along the Intertubercular Sulcus?

Answer 17

The Long Head of the Biceps Brachii

Question 18

What are the Edges of the Intertubercular Sulcus known as?

Answer 18

Lips

Question 19

What attaches to the Lips of the Intertubercular Sulcus?

Answer 19

1. Tendon of the Pectoralis Major
2. Tendon of the Teres Major
3. Tendon of the Latissimus Dorsi

Question 20

What runs between the Greater and Lesser Tubercles, and the Shaft of the Humerus?

Answer 20

The Surgical Neck of the Humerus

Question 21

1. What important Bony Landmarks are found on the Shaft of the Humerus?
2. What do these serve as?

Answer 21

1. a) Deltoid tuberosity
2. b) Radial Groove
3. Attachment sites for Various Muscles

Question 22

Where is the Deltoid Tuberosity located?

Answer 22

On the Lateral Surface of the Humeral Shaft

Question 23

How is the Delotid Tuberosity described?

Answer 23

A Roughened Surface on the Lateral Humeral Shaft

Question 24

What attaches to the Deltoid Tuberosity?

Answer 24

The Deltoid Muscle

Question 25

What is the Radial Groove?

Answer 25

A Shallow Depression

Question 26

Where is the Radial Groove located?

Answer 26

It Runs Diagonally down the Posterior Surface of the Humerus

Question 27

How does the Radial Groove run, in relation to the Deltoid Tuberosity?

Answer 27

Parallel to it

Question 28

What lies in the Radial Groove?

Answer 28

1. Radial Nerve | 2. Profunda Brachii Artery

Question 29

What Muscles attach to the Humeral Shaft Anteriorly?

Answer 29

1. Coracobrachialis 2. Deltoid 3. Brachialis 4. Brachioradialis

Question 30

What Muscles attach to the Humeral Shaft Posteriorly?

Answer 30

1. Medial Head of the Triceps | 2. Lateral Head of the Triceps

Question 31

What is formed Distally, from the: 1. Lateral Border of the Humerus? 2. Medial Border of the Humerus?

Answer 31

1. Lateral Supraepicondylar Ridge | 2. Medial Supraepicondylar Ridge

Question 32

How is the Lateral Supraepicondylar Ridge described?

Answer 32

More Roughened than the Medial Supraepicondylar Ridge

Question 33

What is the function of the Lateral Supraepicondylar Ridge?

Answer 33

It is the Attachment Site for many Extensor Muscles in the Posterior Forearm

Question 34

What is immediately Distal to the 1. Lateral Supraepicondylar Ridge? 2. Medial Supraepicondylar Ridge?

Answer 34

1. Lateral Epicondyle | 2. Medial Epicondyle

Question 35

How are the Lateral / Medial Epicondyles described?

Answer 35

Projections of the Bone

Question 36

1. Can the Lateral / Medial Epicondyles be Palpated? 2. Is one more Palpable? 3. Why?

Answer 36

1. Yes 2. The Medial Epicondyle 3. It is Larger

Question 37

What can be Palpated along the Posterior Side of the Medial Epicondyle?

Answer 37

Ulnar Nerve as it enters into the Forearm

Question 38

What is located Distally and immediately Lateral to the Medial Epicondyle?

Answer 38

The Trochlea

Question 39

Where does the Trochlea extend to?

Answer 39

The Posterior of the Bone

Question 40

What is located Laterally to the Trochlea, but Medially and Distal to the Lateral Epicondyle?

Answer 40

The Capitulum

Question 41

What are the names of the 3 Depressions found on the Distal end of the Humerus?

Answer 41

1. Coronoid Fossa 2. Radial Fossa 3. Olecranon Fossa

Question 42

What articulates with the Ulnar at the Elbow Joint?

Answer 42

The Trochlea

Question 43

What articulates with the Radius at the Elbow Joint?

Answer 43

The Capitulum

Question 44

What shape does the bone form at the Elbow Joint?

Answer 44

A Flattened, 2D like, Shape