$$\text{Carrying Angle} = \arccos\left(\frac{\vec{humerus} \cdot \vec{ulna}}{|\vec{humerus}||\vec{ulna}|}\right)$$

$$\text{Q-angle} = \arccos\left(\frac{\vec{ASIS} \cdot \vec{patella}}{|\vec{ASIS}||\vec{patella}|}\right)$$

Question 1

Which of the following bones is NOT part of the appendicular skeleton?

Accepted Answer

Sternum

Question 2

A patient presents with a fracture at the lateral end of the clavicle. Which joint is most likely affected?

Accepted Answer

Acromioclavicular joint

Question 3

Which anatomical feature of the scapula articulates with the head of the humerus?

Accepted Answer

Glenoid cavity

Question 4

A baseball pitcher suffers an avulsion fracture at the deltoid tuberosity. Which muscle's action will be most affected?

Accepted Answer

Deltoid

Question 5

Which of the following best describes the function of the intertubercular groove of the humerus?

Accepted Answer

Passage for the tendon of the long head of the biceps brachii

Question 6

A patient has a fracture at the surgical neck of the humerus. Which nerve is most at risk of injury?

Accepted Answer

Axillary nerve

Question 7

Which bone forms the lateral boundary of the anatomical snuffbox?

Accepted Answer

Scaphoid

Question 8

A fall on an outstretched hand most commonly results in a fracture of which carpal bone?

Accepted Answer

Scaphoid

Question 9

Which of the following structures is highlighted in green in the image of the scapula with the prominent anterior projection?

Accepted Answer

Coracoid process

Question 10

Which of the following equations correctly represents the calculation of the carrying angle of the elbow?

Accepted Answer

$$	ext{Carrying Angle} = \arccos\left(\frac{\vec{humerus} \cdot \vec{ulna}}{|\vec{humerus}||\vec{ulna}|}ight)$$

Question 11

A patient presents with wrist drop after a midshaft humeral fracture. Which structure is most likely damaged?

Accepted Answer

Radial nerve

Question 12

Which of the following is the correct order of bones from proximal to distal in the upper limb?

Accepted Answer

Clavicle, scapula, humerus, radius/ulna, carpals, metacarpals, phalanges

Question 13

Which anatomical landmark is used to distinguish the anterior from the posterior surface of the scapula?

Accepted Answer

Spine of scapula

Question 14

A patient is unable to abduct their arm beyond 15 degrees. Which structure is most likely injured?

Accepted Answer

Supraspinatus muscle

Question 15

Which of the following best describes the function of the olecranon process?

Accepted Answer

Serves as the insertion for the triceps brachii muscle

Question 16

Which carpal bone is most commonly dislocated?

Accepted Answer

Lunate

Question 17

A patient presents with numbness in the lateral three and a half fingers after a carpal tunnel injury. Which nerve is affected?

Accepted Answer

Median nerve

Question 18

Which of the following equations correctly represents the calculation of the Q-angle (quadriceps angle) in the lower limb?

Accepted Answer

$$	ext{Q-angle} = \arccos\left(\frac{\vec{ASIS} \cdot \vec{patella}}{|\vec{ASIS}||\vec{patella}|}ight)$$

The Appendicular Skeleton: Structure and Features of the Upper Limb

Study Guide - Practice Questions