Upper Limb Muscles: Interactive Quizzes for Anatomy Students

Question 1

Which muscle responsible for thumb movement is innervated by both the median and ulnar nerves?

Accepted Answer

Opponens pollicis

Answer

Flexor carpi radialis

Answer

Pronator quadratus

Answer

Abductor pollicis brevis

Question 2

A patient can bend their fingers but struggles to straighten them. Which muscle is most likely affected?

Accepted Answer

Extensor digitorum

Answer

Flexor digitorum profundus

Answer

Flexor carpi radialis

Answer

Triceps brachii

Question 3

Which nerve innervates the triceps brachii muscle, and what is the primary function of this muscle?

Accepted Answer

Radial nerve; elbow extension

Answer

Radial nerve; elbow flexion

Answer

Median nerve; elbow extension

Answer

Ulnar nerve; elbow extension

Question 4

Which nerve innervates the pectoralis minor muscle, and how does this muscle contribute to thoracic outlet syndrome?

Accepted Answer

Lateral pectoral nerve, thoracic outlet syndrome

Answer

Medial pectoral nerve, costoclavicular syndrome

Answer

Musculocutaneous nerve, brachial plexus injury

Answer

Anterior thoracic nerve, carpal tunnel syndrome

Question 5

Identify the muscle pair that synergistically contributes to elbow flexion.

Accepted Answer

Brachioradialis and biceps brachii

Answer

Biceps brachii and triceps brachii

Answer

Triceps brachii and anconeus

Question 6

Which muscle is responsible for raising the arm away from the body at the shoulder joint, known as abduction?

Accepted Answer

Deltoid

Answer

Trapezius

Answer

Latissimus dorsi

Answer

Pectoralis major

Question 7

Which nerve is primarily responsible for providing motor innervation to the triceps brachii muscle, which extends the elbow?

Accepted Answer

Radial nerve

Answer

Ulnar nerve

Answer

Median nerve

Question 8

Which muscle rotates the forearm inwards at the radioulnar joint, a movement known as pronation?

Accepted Answer

Pronator teres

Answer

Supinator

Answer

Biceps brachii

Question 9

Which muscle is responsible for extending the thumb at the joint closest to the palm, known as the metacarpophalangeal joint?

Accepted Answer

Extensor pollicis longus

Answer

Abductor pollicis brevis

Answer

Flexor pollicis longus

Answer

Adductor pollicis

Question 10

Which muscle action is responsible for externally rotating the arm at the shoulder joint?

Accepted Answer

External rotation of the arm

Answer

Extension of the arm

Answer

Internal rotation of the arm

Answer

Flexion of the arm

Question 11

Which nerve innervates the deltoid muscle, which is responsible for abduction of the arm?

Accepted Answer

Axillary nerve

Answer

Biceps brachii

Answer

Triceps brachii

Answer

Pectoralis major

Question 12

Where does the brachioradialis muscle, which flexes the forearm at the elbow, insert?

Accepted Answer

Radius

Answer

Humerus

Answer

Carpals

Answer

Ulna

Question 13

Which muscle abducts and rotates the thumb away from the palm, a movement known as external rotation?

Accepted Answer

Abductor pollicis brevis

Answer

Flexor pollicis brevis

Answer

Opponens pollicis

Answer

Adductor pollicis

Question 14

Which muscle is primarily responsible for lifting the arm away from the body at the shoulder joint, a movement known as abduction?

Accepted Answer

Supraspinatus

Answer

Biceps brachii

Answer

Pectoralis major

Answer

Flexor carpi radialis

Question 15

Which muscle is primarily responsible for flexing the elbow joint?

Accepted Answer

Biceps brachii

Answer

Brachialis

Answer

Anconeus

Answer

Triceps brachii

Question 16

Which muscle group is responsible for abducting the arm at the shoulder joint?

Accepted Answer

Deltoids

Answer

Rotator cuff muscles

Answer

Latissimus dorsi

Answer

Pectoralis major

Question 17

Which of the following muscles pronates the forearm?

Accepted Answer

Pronator teres

Answer

Brachioradialis

Answer

Supinator

Answer

Flexor carpi radialis

Question 18

Which muscle inserts onto the base of the first metacarpal bone and is responsible for abducting the thumb?

Accepted Answer

Abductor pollicis brevis

Answer

Thenar muscles

Answer

Hypothenar muscles

Answer

Adductor pollicis

Question 19

Which of the following actions is NOT a function of the rotator cuff muscles?

Accepted Answer

Flexion of the shoulder joint

Answer

Stabilization of the shoulder joint

Answer

External rotation of the arm

Answer

Abduction of the arm

Question 20

Which muscle is primarily responsible for flexing the wrist joint?

Accepted Answer

Flexor carpi radialis

Answer

Ulnar deviator

Answer

Extensor carpi radialis longus

Answer

Palmaris longus

Question 21

Which muscle is responsible for adducting the thumb?

Accepted Answer

Adductor pollicis

Answer

Opponens pollicis

Answer

Flexor pollicis longus

Answer

Abductor pollicis brevis