Upper Limb

Question 1

What nerve innervates that posterior arm and posterior forearm?

Answer 1

Radial Nerve

Question 2

What nerve innervates the anterior arm?

Answer 2

Musculocutaneous nerve

Question 3

What innervates the anterior forearm?

Answer 3

Mainly median nerve
(Some ulnar nerve)

Question 4

What innervates the intrinsic muscles of the hand?

Answer 4

Mainly Ulnar nerve
(Some median)

Question 5

What is the Pneumonic for remembering the muscles of the Anterior arm?

Answer 5

BBC

Question 6

What are muscle of the anterior arm?

Use the Pneumonic

Answer 6

Brachialis
Biceps brachii
Coracobrachialis

Question 7

What nerve innervates the Brachialis, Biceps brachii and Coracobrachialis?

Answer 7

Musculocutaneous nerve

Question 8

What are the 2 parts of the Biceps brachii called?

Answer 8

Long head of biceps
Short head of biceps

Question 9

What 2 muscles of the anterior arm share an origin? (They bifurcate from the same tendon)

What is this origin?

Answer 9

Coracobrachialis
Short head of biceps brachii

Origin = Coracoid process of Scapula

Question 10

Where does the Coracobrachialis insert?

Answer 10

Humerus (medial side of shaft)

Question 11

Where is the long head of biceps in relation to the short head of biceps brachii?

Answer 11

Lateral to short head of biceps
Think LL Long head Lateral
Short head of biceps is medial

Question 12

Where is the origin of the long head of biceps?

Answer 12

Tendon from Supraglenoid tubercle

Question 13

What are the 2 places which the biceps brachii (both heads) insert?

Answer 13

They both come together to form a single tendon

Inserts:
-Radial tuberosity
-Bicipital aponeurosis which blends with the deep fascia of the forearm

Question 14

What is the Bicipital aponeurosis?

Answer 14

Flat sheet like tendon from the biceps that forms the roof of the cuboidal fossa (blends with deep fascia of forearm)

Question 15

What is the origin of the Biceps Brachialis?

Answer 15

Distal 2/3s of humerus

Question 16

What is the insertion of the Biceps Brachialis?

Answer 16

Ulnar tuberosity

Question 17

Where is the biceps Brachialis with respect to the biceps brachii?

Answer 17

Inferior to the biceps brachii

Question 18

What is the origin and insertion of the Coracobrachialis?

Answer 18

Origin: Coracoid process of scapula

Insertion: Humerus (medial side of shaft

Question 19

What is the motor function of the Coracobrachialis?

Answer 19

Adduction

Question 20

Where is the origin and insertion of the short head of biceps?

Answer 20

Origin: Coracoid process of Scapula

Insertion: Radial tuberosity and Bicipital aponeurosis

Question 21

What is the origin and insertion of the long head of biceps?

Answer 21

Origin: Supraglenoid tubercle

Insertion: Radial tuberosity and Bicipital aponeurosis

Question 22

What is the motor function of the Long head of biceps and short head of biceps?

Answer 22

Flex arm at shoulder
Flex forearm
Supination

Question 23

What is the origin and insertion of the Biceps Brachialis?

Answer 23

Origin: Distal 2/3s of humerus

Insertion: Ulnar tuberosity

Question 24

What is the motor function of the Brachialis?

Answer 24

Flexor of forearm at elbow
(Ulnar is the hinge, it attaches to the ulnar tuberosity)