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MBChB - Y3 - MSK Upper Limb Anatomy > 2.1.1. The Humerus > Flashcards

2.1.1. The Humerus Flashcards

1
Q

Where is the Humerus found?

A

The Upper Arm

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2
Q

What does the Humerus join?

A
  1. The Glenohumeral Joint (Shoulder)

2. The Forearm

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3
Q

What does the Proximal part of the Humerus articulate with?

A

The Glenoid Fossa of the Scapula

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4
Q

What does the Distal part of the Humerus articulate with?

A

The Forearm Bones, to form the Elbow Joint

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5
Q

What 2 Forearm Bones does the Humerus articulate with?

A
  1. Radius

2. Ulnar

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6
Q
  1. What does the Humerus act as?

2. What does this result in?

A
  1. An attachment site for Muscles and Ligaments

2. Various Raised and Roughening on the Bony Surface

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7
Q

What are the 6 important Proximal Features of the Humerus?

A
  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
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8
Q

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

A

The Anatomical Neck

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9
Q

How is the Anatomical Neck of the Humerus described?

A

Short and Nondescript (trick question)

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10
Q

Where is the Greater Tubercle located on the Humerus?

A

Laterally

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11
Q
  1. How many Faces does the Greater Tubercle of the Humerus have?
  2. What are they?
A
  1. 2
  2. a) Anterior Face
  3. b) Posterior Face
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12
Q

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

A

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

  1. Supraspinatus
  2. Infraspinatus
  3. Teres Minor
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13
Q

Where is the Lesser Tubercle located on the Humerus?

A

Medially to the Greater Tubercle of the Humerus

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14
Q
  1. How many Face does the Lesser Tubercle of the Humerus have?
  2. What are they?
A
  1. 1

2. An Anterior Face

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15
Q

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

A

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

Subscapularis

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16
Q

What separates the Greater and Lesser Tubercles of the Humerus?

A

The Intertubercular Sulcus (Groove)

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17
Q

What runs along the Intertubercular Sulcus?

A

The Long Head of the Biceps Brachii

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18
Q

What are the Edges of the Intertubercular Sulcus known as?

A

Lips

19
Q

What attaches to the Lips of the Intertubercular Sulcus?

A
  1. Tendon of the Pectoralis Major
  2. Tendon of the Teres Major
  3. Tendon of the Latissimus Dorsi
20
Q

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

A

The Surgical Neck of the Humerus

21
Q
  1. What important Bony Landmarks are found on the Shaft of the Humerus?
  2. What do these serve as?
A
  1. a) Deltoid tuberosity
  2. b) Radial Groove
  3. Attachment sites for Various Muscles
22
Q

Where is the Deltoid Tuberosity located?

A

On the Lateral Surface of the Humeral Shaft

23
Q

How is the Delotid Tuberosity described?

A

A Roughened Surface on the Lateral Humeral Shaft

24
Q

What attaches to the Deltoid Tuberosity?

A

The Deltoid Muscle

25
Q

What is the Radial Groove?

A

A Shallow Depression

26
Q

Where is the Radial Groove located?

A

It Runs Diagonally down the Posterior Surface of the Humerus

27
Q

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

A

Parallel to it

28
Q

What lies in the Radial Groove?

A
  1. Radial Nerve

2. Profunda Brachii Artery

29
Q

What Muscles attach to the Humeral Shaft Anteriorly?

A
  1. Coracobrachialis
  2. Deltoid
  3. Brachialis
  4. Brachioradialis
30
Q

What Muscles attach to the Humeral Shaft Posteriorly?

A
  1. Medial Head of the Triceps

2. Lateral Head of the Triceps

31
Q

What is formed Distally, from the:

  1. Lateral Border of the Humerus?
  2. Medial Border of the Humerus?
A
  1. Lateral Supraepicondylar Ridge

2. Medial Supraepicondylar Ridge

32
Q

How is the Lateral Supraepicondylar Ridge described?

A

More Roughened than the Medial Supraepicondylar Ridge

33
Q

What is the function of the Lateral Supraepicondylar Ridge?

A

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

34
Q

What is immediately Distal to the

  1. Lateral Supraepicondylar Ridge?
  2. Medial Supraepicondylar Ridge?
A
  1. Lateral Epicondyle

2. Medial Epicondyle

35
Q

How are the Lateral / Medial Epicondyles described?

A

Projections of the Bone

36
Q
  1. Can the Lateral / Medial Epicondyles be Palpated?
  2. Is one more Palpable?
  3. Why?
A
  1. Yes
  2. The Medial Epicondyle
  3. It is Larger
37
Q

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

A

Ulnar Nerve as it enters into the Forearm

38
Q

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

A

The Trochlea

39
Q

Where does the Trochlea extend to?

A

The Posterior of the Bone

40
Q

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

A

The Capitulum

41
Q

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

A
  1. Coronoid Fossa
  2. Radial Fossa
  3. Olecranon Fossa
42
Q

What articulates with the Ulnar at the Elbow Joint?

A

The Trochlea

43
Q

What articulates with the Radius at the Elbow Joint?

A

The Capitulum

44
Q

What shape does the bone form at the Elbow Joint?

A

A Flattened, 2D like, Shape

MBChB - Y3 - MSK Upper Limb Anatomy (48 decks)

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