Question 1

Which muscle is primarily responsible for abduction of the arm at the shoulder joint?

Accepted Answer

Deltoid

Question 2

A patient suffers an injury to the coracoid process of the scapula. Which muscle's function is most likely to be affected?

Accepted Answer

Biceps Brachii

Question 3

During elbow flexion, which muscle is responsible for lifting the ulna?

Accepted Answer

Brachialis

Question 4

Which muscle inserts on the radial tuberosity and is involved in elbow flexion?

Accepted Answer

Biceps Brachii

Question 5

If a person cannot extend their elbow, which muscle is most likely injured?

Accepted Answer

Triceps Brachii

Question 6

Which muscle originates from the distal humerus and inserts on the styloid process of the radius?

Accepted Answer

Brachioradialis

Question 7

A baseball pitcher experiences pain at the olecranon process after throwing. Which muscle is most likely involved?

Accepted Answer

Triceps Brachii

Question 8

Which muscle is NOT involved in elbow flexion?

Accepted Answer

Triceps Brachii

Question 9

A student is asked to identify the muscle that originates from the clavicle and acromion process. Which muscle should they select?

Accepted Answer

Deltoid

Question 10

Which muscle's action is to lift the radius during elbow flexion?

Accepted Answer

Brachioradialis

Question 11

If the diaphysis of the humerus is fractured, which muscle's insertion is most likely compromised?

Accepted Answer

Deltoid

Question 12

Which muscle would be most affected by an injury to the coronoid process of the ulna?

Accepted Answer

Brachialis

Question 13

A patient presents with weakness in arm abduction. Which muscle is most likely impaired?

Accepted Answer

Deltoid

Question 14

Which muscle is located on the posterior aspect of the upper extremity and is responsible for elbow extension?

Accepted Answer

Triceps Brachii

Question 15

During a biceps curl exercise, which muscle is NOT directly involved in elbow flexion?

Accepted Answer

Triceps Brachii

Question 16

Which muscle originates from the posterior humerus and inserts on the olecranon process?

Accepted Answer

Triceps Brachii

Question 17

A patient has difficulty lifting objects with their forearm. Which muscle, inserting on the styloid process of the radius, may be injured?

Accepted Answer

Brachioradialis

Question 18

Which muscle's origin is the distal humerus and its action is to lift the radius during elbow flexion?

Accepted Answer

Brachioradialis

Question 19

If a patient cannot flex their elbow, which muscle is LEAST likely to be the cause?

Accepted Answer

Triceps Brachii

Question 20

Which muscle is involved in both elbow flexion and has its insertion on the radial tuberosity?

Accepted Answer

Biceps Brachii

Muscles of the Upper Extremity: Origins, Insertions, and Actions

Study Guide - Practice Questions