Question 1

Which nerve innervates the dorsal muscles of the upper limb responsible for extension?

Accepted Answer

Radial nerve

Question 2

A patient presents with difficulty flexing their elbow but can still flex their wrist. Which muscle is most likely affected?

Accepted Answer

Brachialis

Question 3

Which muscle originates from the coracoid process and does NOT cross the elbow joint?

Accepted Answer

Coracobrachialis

Question 4

If the musculocutaneous nerve is damaged, which of the following actions would be most impaired?

Accepted Answer

Flexion of the elbow

Question 5

Which muscle is a powerful supinator of the forearm and is also involved in flexing the elbow?

Accepted Answer

Biceps brachii

Question 6

The triceps brachii muscle inserts on which bony landmark?

Accepted Answer

Olecranon process of ulna

Question 7

Which muscle is deep to the biceps brachii and is best seen on the lateral side of the arm?

Accepted Answer

Brachialis

Question 8

A patient has lost the ability to extend their elbow. Which nerve is most likely damaged?

Accepted Answer

Radial nerve

Question 9

Which muscle attaches to the radial tuberosity and is innervated by the musculocutaneous nerve?

Accepted Answer

Biceps brachii

Question 10

If a person cannot flex or adduct their shoulder, which muscle is most likely impaired?

Accepted Answer

Coracobrachialis

Question 11

Which muscle originates from the supraglenoid tubercle of the scapula?

Accepted Answer

Biceps brachii (long head)

Question 12

Which of the following is TRUE regarding the innervation of ventral muscles of the upper limb?

Accepted Answer

They are innervated by the musculocutaneous, median, or ulnar nerves

Question 13

A patient is unable to supinate their forearm. Which muscle and nerve are most likely involved?

Accepted Answer

Biceps brachii and musculocutaneous nerve

Question 14

Which muscle does NOT cross the elbow joint but is involved in flexing and adducting the shoulder?

Accepted Answer

Coracobrachialis

Question 15

Which of the following best describes the function of the brachialis muscle?

Accepted Answer

Flexes the elbow

Question 16

Which muscle is innervated by the musculocutaneous nerve and is responsible for both flexion and supination of the forearm?

Accepted Answer

Biceps brachii

Question 17

If the axillary nerve is damaged, which action would be most affected?

Accepted Answer

Abduction of the shoulder

Question 18

Which muscle originates from the coracoid process and is also a part of the biceps brachii?

Accepted Answer

Short head of biceps brachii

Question 19

A patient can flex their shoulder but cannot flex their elbow. Which muscle is most likely still functioning?

Accepted Answer

Coracobrachialis

Question 20

Which of the following muscles is NOT innervated by the musculocutaneous nerve?

Accepted Answer

Triceps brachii

Muscles of the Upper Limb: Brachium and Antebrachium Musculature 10.2

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