19. Arm and Cubital Fossa

Question 1

What are the muscles in the anterior compartment of the arm?

Answer 1

Biceps brachii
Coracobrachialis
Brachialis

Question 2

Innervation of anterior compartment of arm?

Answer 2

Musculocutaneous nerve C5-C6

Question 3

Origin of biceps brachii?

Answer 3

Long head - supraglenoid tubercle of scapula

Short head - coracoid process

Question 4

Insertion of biceps brachii?

Answer 4

Radial tuberosity

Question 5

Function of biceps brachii?

Answer 5

Supination
Flexion of elbow (when supine)
Weak flexion of arm

Question 6

Origin of coracobrachialis?

Answer 6

Coracoid process of scapula

Question 7

Insertion of coracobrachialis?

Answer 7

Medial midshaft of humerus

Question 8

Function of coracobrachialis?

Answer 8

Flexion of arm

Adduction

Question 9

Origin of brachialis?

Answer 9

Distal half of anterior surface of humerus

Question 10

Insertion of brachialis?

Answer 10

Ulnar tuberosity

Coronoid process

Question 11

Function of brachialis?

Answer 11

Flexion of elbow

Question 12

What is the major muscle of the posterior compartment of the arm?

Answer 12

Triceps brachii

Question 13

Origin of triceps brachii?

Answer 13

Long head - infraglenoid tubercle of scapula
Medial head - posterior surface of shaft of humerus
Lateral head - humerus superior to radial groove

Question 14

Insertion of triceps brachii?

Answer 14

Olecranon of ulna

Question 15

Function of triceps brachii?

Answer 15

Extends elbow joint

Question 16

Innervation of triceps brachii?

Answer 16

Radial nerve C6-C8

Question 17

What are the branches of the brachial artery?

Answer 17

Profunda brachii
Radial collateral
Superior and inferior ulnar collateral

Question 18

What are the boundaries of the cubital fossa?

Answer 18

Lateral - brachioradialis
Medial - pronator teres
Roof - skin, fascia, bicipital aponeurosis
Floor - brachialis

Question 19

Where is the cephalic vein found?

Answer 19

Superficial fascia above the bicipital aponeurosis

Question 20

Via which vein do the cephalic and basillic veins communicate?

Answer 20

Median cubital

Question 21

Which nerve, artery, veins and tendons are found in the cubital fossa?

Answer 21

Median nerve
Bifurcation of brachial artery into ulnar and radial arteries
Tendon of biceps
Deep veins

Question 22

What are the 2 septums found in the arm?

Answer 22

Lateral intermuscular

Medial intermuscular

Question 23

Name the bony features of the distal humerus (8)

Answer 23

Lateral supracondylar ridge
Medial and lateral epicondyles
Capitulum
Coronoid fossa
Trochlea 
Olecranon fossa

Question 24

Which elbow ligaments prevent ab and adduction?

Answer 24

Medial and lateral collateral

Question 25

Which elbow ligament allows pronation and supination?

Answer 25

Annular ligament

Question 26

How many parts are in the lateral collateral ligament vs the medial one?

Answer 26

Lateral - one band

Medial - 3 parts

Question 27

Name the bony features of the radius? (3)

Answer 27

Head
Radial tuberosity
Styloid process

Question 28

Name the bony features of the ulna ((4)

Answer 28

Trochlear notch
Coronoid process
Olecranon
Styloid process of ulna

Question 29

MAKE SURE YOU KNOW THE MUSCLES THAT ATTACHE TO THE ARM

Answer 29

SLIDE 24