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Medical Anatomy > Pectoral Girdle > Flashcards

Pectoral Girdle Flashcards

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USMLE® Step 1 flashcards
1
Q

Which two bones compromise the pectoral girdle?

A

The scapula and the clavicle

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2
Q

Where does the clavicle articulate medically?

A

Manubrium of the sternum (sternoclavicular joint)

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3
Q

Where does the clavicle articulate laterally?

A

The acromion process of the scapula (acromioclavicular joint)

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4
Q

Why do humans have clavicles?

A
  1. To be a strut (for more mobility of upper limb)

2. Breakable link (due to curved nature) to protect damage to sternoclavicular joint

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5
Q

How do you differentiate the medial and lateral end of the clavicle?

A

Medical end is bulbous for articulation. Lateral end is flattened in transverse plane.

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6
Q

How do you differentiate posterior and anterior on the clavicle?

A

The anterior medial side is convex and the lateral anterior side is concave

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7
Q

How do you differentiate the clavicle form superior to inferior?

A

Superiorly the clavicle is smooth and inferiority the clavicle has lots of bony grooves and protuberances for attatchment

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8
Q

What attaches to the costal tuberosity?

A

The costoclavicular ligament

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9
Q

What attatches to the subclavian groove?

A

The subclavius muscle (function is to depress the clavicle)

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10
Q

What attaches to the conoid tubercle?

A

The conoid ligament

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11
Q

What attaches to the trapezoid line?

A

The trapezoid ligament

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12
Q

What two joints does the clavicle articulate with?

A

The sternoclavicular joint (m) and the acromioclavicluar joint (l)

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13
Q

What are the 3 borders of the scapula?

A

Lateral - axillary
Medial - vertebral
Superior

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14
Q

What are the three angles of the scapula?

A

Superior angle
Inferior angle
Lateral angle

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15
Q

What are the 3 processes of the scapula?

A

Corocoid process (lig and muscle)
Scapula spine
Acromion process

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16
Q

What is the name of the anterior side of the scapula and what joint does it form?

A

Costal side - forms the scapulothoracic joint

17
Q

What is the name of theposterior side of the scapula and what joint does it form?

A

The dorsal side -

18
Q

What is the name of the flattened depression on costal side of the scapula? What muscle attaches here?

A

The subscapula fossa. The subscapularis

19
Q

What muscle attaches to the robust medial side of the costal scapula?

A

The serratus anterior muscle

20
Q

What is the name of the two fossae on the dorsal side of the scapula?

A

The supraspious and infraspinous fossae

21
Q

Which muscles have their medial attachment at the supraspinous and infraspinous fossae?

A

The supraspinatus muscle and the infraspinatus muscle

22
Q

What is the purpose of the spinoglenoid notch?

A

Communication between supraspinous and infraspinous fossae

23
Q

Where is the suprascapular notch located and what passes through here?

A

The superior surface of scapula and suprascapula nerve, suprascapular artery and the suprascapular vein

24
Q

What muscles attach to the supraglenoid and infraglenoid tubercles?

A

The biceps brachii and the triceps brachii respectively

25
Q

What is the name of the junction between proximal epiphysis and the proximal metaphysis?

A

The anatomical neck

26
Q

What is the name of the junction between the proximal metaphysis and the proximal diaphysis?

A

The surgical neck

27
Q

What proportion of the humeral head articulations surface is in direct contact with the glenoid fossa?

A

1/3

28
Q

Which muscles attach to the greater tubercle facets?

A

Rotator cuff muscles
Sup - supraspinatus
Mid - infraspinatus
Inf - teres minor

29
Q

Which muscles attach to the lesser tubercle?

A

Subscapularis

30
Q

What is the name of the groove between the greater and lesser tubercles?

A

Intertubercular groove

31
Q

Which tendon is stabilised between the greater and lesser tubercle?

A

The biceps brachii tendon

32
Q

What is the name of the v shaped tuberosity in the mid shaft of the humerus? What muscle attaches here?

A

Deltoid tuberosity. The deltoid muscle

33
Q

What are the flared portions of bone proximal to the humeral condyles called?

A

The medial and lateral supracondylar ridges

34
Q

What is the larger epicondyle?

A

Medial

35
Q

What is the joint between the trochlea and the ulna?

A

Humeroulna joint

36
Q

What does the head of the radius articulate with?

A

Capitulum

37
Q

What are the names of the 3 fossae on the distal side of the radius?

A

Coronoid
Radial
Elecronon

Medical Anatomy (15 decks)

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