MSK 2.1 - The Anterior and Posterior Arm Flashcards Preview

ESA 2 > MSK 2.1 - The Anterior and Posterior Arm > Flashcards

Flashcards in MSK 2.1 - The Anterior and Posterior Arm Deck (27):
1

What is the origin of the short head of the biceps brachii?

Coracoid process of the scapula

2

Where does the biceps brachii insert?

The radial tuberosity

3

Describe the shape and size of the biceps brachii

- Large

- Two heads which combine to form a belly at the level of the humeral shaft

4

What is the nerve supply of the biceps brachii?

Musculocutaneous nerve (C5, C6)

5

Give the actions of the biceps brachii (4)

- Flexion of the elbow

- Supination of the forearm

- Flexion of the humerus at the shoulder

- Stabilisation of the shoulder joint (long head)

6

What happens if the tendon of the long head of the biceps brachii ruptures?

- Produces 'Popeye sign' upon flexion'

- Don't notice any muscle weakness due to Brachialis and Supinator muscles

7

What is the origin of the Brachialis?

The medial and lateral surfaces of the humeral shaft

8

Where does the Brachialis insert? (2)

- Tuberosity of the ulna, distal to elbow joint

- Anterior surface of coronoid process of the ulna

9

Describe the size of the Brachialis

Small but bigger than the Coracobrachialis

10

What is the nerve supply of the Brachialis?

- Musculocutaneous nerve (C5 and C6)

- Radial nerve (C7)

11

Give the actions of the Brachialis (2)

- Flexion of the forearm

- Protection of the elbow

12

What is the origin of the Coracobrachialis?

Coracoid process of the scapula

13

Where does the Coracobrachialis insert?

Medial side of the humeral shaft

14

Describe the size of the Coracobrachialis

Small

15

What is the nerve supply of the Coracobrachialis?

Musculocutaneous nerve (C5-C7)

16

What are the actions of the Coracobrachialis?

- Flexion of the humerus

- Adduction of the humerus

17

What are the four borders of the cubital fossa?

- Medial and lateral epicondyles

- Medial border of the brachioradialis

- Lateral border of pronator Teres

- Median cubital vein

18

Give two clinically relevant features of the cubital fossa

- Feeling of brachial pulse medial to biceps tendon is relevant to taking blood pressure

- Medial cubital vein runs through which connects to basilic and cephalic veins both of which are common sites for venepuncture

19

Give the names of the three heads of the triceps brachii

- Lateral
- Medial
- Long

20

Where is the origin of the lateral head of the triceps brachii?

Between Teres minor and superior to groove of posterior surface of the humerus

21

Where is the origin of the medial head of the triceps brachii?

Inferior to the radial groove on the posterior shaft of the humerus

22

Where is the origin of the long head of the triceps brachii?

Infraglenoid tubercule of the scapula

23

Where do all three heads of the triceps brachii insert?

The olecranon of the ulna

24

What is the nerve supply of the triceps brachii?

The radial nerve (C7, C8)

25

What is the action of the triceps brachii?

Extension of the elbow

26

How is the triceps brachii clinically relevant?

A tap on the triceps tendon tests C7

27

What is the origin of the long head of the biceps brachii?

Supraglenoid tubercule of the scapula

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