🤔 MEDIUM

The musculoskeletal system is a fascinating topic. The quiz is about the bones, muscles and their associated arterial and nervous supply. Good luck!

Reviewed by: awaiting review

Musculoskeletal anatomy - Part 3

Congratulations - you have completed Musculoskeletal anatomy - Part 3. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%%
Your answers are highlighted below.
Question 1
Regarding the orientation of the clavicle, which of the following is not true?
A
It has a flattened lateral end
B
Its anterior border is concave forward on the medial end
C
Its anterior border is concave forward on the lateral end
D
It has a quadrangular medial end
E
Its posterior border is concave backward on the medial end
Question 1 Explanation: 
The anterior border is convex forward on the lateral end. Palpate your own clavicle to confirm that.
Question 2
Which of the following muscle is not a rotator cuff muscle?
A
Infraspinatus
B
Subscapularis
C
Supraspinatus
D
Teres major
E
Teres minor
Question 3
A patient has difficulty with starting right arm abduction and has to physically use the left arm to facilitate the movement. Which muscle is most likely affected in this case?
A
Biceps brachii
B
Deltoid
C
Serratus anterior
D
Supraspinatus
E
Trapezius
Question 3 Explanation: 
Supraspinatus initiates arm abduction. It is responsible for the first 15 degree of arm abduction before the deltoid takes over the movement.
Question 4
Which of the following muscles does not attach to the scapula?
A
Pectoralis major
B
Pectoralis minor
C
Rhomboid major
D
Rhomboid minor
E
Trapezius
Question 4 Explanation: 
The only odd one out is the pectoralis major that attaches to the humerus, clavicle and sternum. The pectoralis minor attaches to the coracoid process of the scapula.
Question 5
Which of the following muscles crosses two joints?
A
Biceps brachii
B
Brachialis
C
Brachioradialis
D
Coracobrachialis
E
Palmaris longus
Question 5 Explanation: 
Biceps brachii crosses the shoulder joint and elbow joint
Question 6
The articulating surfaces of which of the following synovial joints are covered by fibrocartilage?
A
Acromioclavicular joint
B
glenohumeral joint
C
manubriosternal joint
D
scapholunate joint
E
Sternocostal joint
Question 6 Explanation: 
The rest are covered by hyaline cartilage
Question 7

STEM 1 OF 4

Read the following vignette: A patient is admitted to the A&E with suspected fracture at the surgical neck of the humerus. He is observed to have difficulty with arm abduction. Which nerve is most likely affected?
A
Axillary nerve
B
Median nerve
C
Musculocutaneous nerve
D
Radial nerve
E
Ulnar nerve
Question 7 Explanation: 
The axillary nerve runs at close proximity to the surgical neck of the humerus and passes through the quadrangular space.
Question 8

STEM 2 OF 4

Which muscles does the nerve in stem 1 of 4 supply?
A
Deltoid and supraspinatus
B
Deltoid and teres major
C
Deltoid and teres minor
D
Supraspinatus and teres major
E
Supraspinatus and teres minor
Question 9

STEM 3 OF 4

Which major sensory deficit would be observed with an injury to the nerve of stem 1 of 4?
A
Impaired cutaneous sensation to anterior lower arm
B
Impaired cutaneous sensation to lateral upper arm
C
Impaired cutaneous sensation to medial lower arm
D
Impaired cutaneous sensation to posterior lower arm
E
Impaired cutaneous sensation to medial upper arm
Question 9 Explanation: 
The axillary nerve gives rise to the upper lateral cutaneous nerve of arm that supplies the skin over the area of the deltoid muscle
Question 10

STEM 4 OF 4

Which artery often accompanies the nerve in stem 1 of 4?
A
Anterior circumflex humeral artery
B
Circumflex subscapular artery
C
Posterior circumflex humeral artery
D
Subscapular artery
E
Thoracodorsal artery
Question 10 Explanation: 
PCHA is a branch of the axillary artery that runs alongside the axillary nerve posterior to the surgical neck of the humerus. They both pass through the quadrangular space.
Question 11
Which of the following muscle does not originate from the common flexor tendon?
A
Flexor carpi radialis
B
Flexor carpi ulnaris
C
Flexor digitorum profundus
D
Flexor digitorum superficialis
E
Pronator teres
Question 11 Explanation: 
The common flexor tendon attaches to the medial epicondyle of the humerus and gives attachment to the superficial layer forearm muscles. The flexor digitorum profundus originates from the proximal ventral ulnar.
Question 12
What is the function of the lumbricals?
A
Extend metacarpophalangeal and extend interphalangeal joints
B
Extend metacarpophalangeal and flex interphalangeal joints
C
Flex metacarpophalangeal and extend interphalangeal joints
D
Flex metacarpophalangeal and flex interphalangeal joints
E
Opposition of metacarpophalangeal joint of the thumb
Question 13
With respect to the brachial plexus:
A
The ulnar nerve is a branch of the lateral cord
B
The musculocutaneous nerve is a branch of the posterior cord
C
There are 13 branches from the cords
D
There are five roots, three trunks, five divisions and three cords
E
The roots lie within the posterior triangle of the neck
Question 13 Explanation: 
The lateral cord gives off three branches (C5, 6, 7): 1. Lateral pectoral nerve (C5, 6, 7). 2. Lateral root of the median nerve (C5, 6, 7). 3. Musculocutaneous nerve (C5, 6, 7). The medial cord gives off five branches (C8, T1). 1. Medial pectoral nerve (C8, T1). 2. Medial root of the median nerve (C8, T1). 3. Ulnar nerve (C8, T1). 4. Medial cutaneous nerve of the arm (C8, T1). 5. Medial cutaneous nerve of the forearm (C8, T1). The posterior cord gives off five branches (C5, 6, 7, 8, T1): 1. Upper subscapular nerve (C5, 6). 2. Lower subscapular nerve (C5, 6). 3. Thoracodorsal nerve (nerve to latissimus dorsi) (C6, 7, 8). 4. Axillary nerve (C5, 6). 5. Radial nerve (C5, 6, 7, 8, T1).
Once you are finished, click the button below. Any items you have not completed will be marked incorrect. Get Results
There are 13 questions to complete.

Spotted an error?

14 + 7 =