Arm

Question 1

List the anterior muscles of the arm

Answer 1

BBC
Biceps brachii
Coracobrachialis
Brachialis

Question 2

What is the nerve supply to anterior muscles of the arm?

Answer 2

Musculocutaneous nerve

Question 3

Which movements does biceps brachii enable?

Answer 3

Elbow: flexion
Shoulder: flexion, abduction
Forearm: supination

Question 4

Which movements does coracobrachialis enable?

Answer 4

Arm: adduction, flexion

Question 5

Which movements does brachialis enable?

Answer 5

Elbow: flexion

Question 6

Name the posterior muscle of the arm

Answer 6

Triceps brachii

Question 7

Which movements does triceps brachii enable?

Answer 7

Forearm: extension
Arm: extension, adduction
Shoulder: extension

Question 8

What is the nerve supply to the posterior arm?

Answer 8

Radial nerve

Question 9

What are the tendons of biceps brachii?

Answer 9

Biceps tendon

Bicipital aponeurosis

Question 10

Muscle bellies are held in place by which two tendons?

Answer 10

Palmar carpal ligament

Flexor retinaculum

Question 11

What nerve is most likely to be damaged in humeral shaft fractures? What is the clinical sign?

Answer 11

Radial nerve

Wrist drop

Question 12

Tennis elbow is usually felt on which epicondyle?

Answer 12

Lateral

Question 13

Golfer’s elbow is usually felt on which epicondyle?

Answer 13

Medial

Question 14

A supracondylar fracture will lead to damage to what two vessels?

Answer 14

Brachial artery occlusion

Median nerve injury

Question 15

Damage to the ulnar nerve will result in which clinical sign…

Answer 15

Claw hand

Question 16

What type of joint is the radiohumeral joint?

Answer 16

Ball and socket

Question 17

What nerve roots does the brachial plexus originate from? What mnemonic is used to remember the course?

Answer 17

Anterior ramii of C5-T1

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Question 18

What nerve roots are the superior, middle and inferior trunks composed of, respectively?

Answer 18

C5 and C6
C7
C8 and T1

Question 19

The cords are composed of the anterior/posterior divisions of which trunks - lateral, posterior and medial?

Answer 19

Anterior division of superior and middle
Posterior division of superior, middle and inferior
Anterior division of inferior

Question 20

Which nerves are associated with each of the cords in the brachial plexus?

Answer 20

LATERAL: Musculocutaneous and median
POSTERIOR: Axillary and radial
MEDIAL: Median and ulnar

Question 21

The cords of the brachial plexus lie around which artery?

Answer 21

Axillary artery

Question 22

Give the motor and sensory functions of the musculocutaneous nerve

Answer 22

Innervates the brachialis, biceps brachii and coracobrachialis muscles.

Gives off the lateral cutaneous branch of the forearm innervates the lateral half of the anterior forearm, and a small lateral portion of the posterior forearm.,

Question 23

Give the motor and sensory functions of the axillary nerve

Answer 23

Innervates the teres minor and deltoid muscles.

Gives off the superior lateral cutaneous nerve of arm, which innervates the inferior region of the deltoid (“regimental badge area”).

Question 24

Give the motor and sensory functions of the median nerve

Answer 24

Innervates most of the flexor muscles in the forearm, the thenar muscles, and the two lateral lumbricals associated with the index and middle fingers.

Gives off the palmar cutaneous branch, which innervates the lateral part of the palm, and the digital cutaneous branch, which innervates the lateral three and a half fingers on the anterior (palmar) surface of the hand.

Question 25

Give the motor and sensory functions of the radial nerve

Answer 25

Innervates the triceps brachii, and the muscles in the Posterior compartment of the forearm

Innervates the posterior aspect of the arm and forearm, and the posterolateral aspect of the hand.

Question 26

Give the motor and sensory functions of the ulnar nerve

Answer 26

Innervates the muscles of the hand (apart from the thenar muscles and two lateral lumbricals), flexor carpi ulnaris and medial half of flexor digitorum profundus.

Innervates the anterior and posterior surfaces of the medial one and half fingers, and associated palm area.