Question 1

A patient is unable to flex and adduct their wrist. Which muscle is most likely injured?

Accepted Answer

Flexor Carpi Ulnaris

Question 2

Which muscle originates from the medial epicondyle of the humerus and inserts into the palmar aponeurosis, primarily flexing the wrist?

Accepted Answer

Palmaris Longus

Question 3

A baseball player presents with difficulty extending and abducting their wrist. Which muscle is most likely affected?

Accepted Answer

Extensor Carpi Radialis Longus

Question 4

Which of the following muscles is responsible for digit extension of fingers 2-5 and also assists in wrist extension and abduction?

Accepted Answer

Extensor Digitorum

Question 5

If the lateral epicondyle of the humerus is fractured, which of the following muscles is LEAST likely to be affected?

Accepted Answer

Flexor Carpi Ulnaris

Question 6

A patient is unable to extend their wrist and abduct it. Which muscle is most likely paralyzed?

Accepted Answer

Extensor Carpi Radialis Longus

Question 7

Which muscle originates from the lateral epicondyle of the humerus and inserts into the metacarpal 5, extending and adducting the wrist?

Accepted Answer

Extensor Carpi Ulnaris

Question 8

A patient presents with weakness in flexing the wrist and adducting it. Which muscle is most likely involved?

Accepted Answer

Flexor Carpi Ulnaris

Question 9

Which muscle is responsible for flexing the wrist but does not contribute to adduction or abduction?

Accepted Answer

Palmaris Longus

Question 10

A patient has lost the ability to extend their fingers at the distal phalanges of digits 2-5. Which muscle is most likely damaged?

Accepted Answer

Extensor Digitorum

Question 11

Which of the following best describes the action of the Flexor Carpi Radialis?

Accepted Answer

Flexes and abducts the wrist

Question 12

Which muscle would be primarily responsible for wrist extension if the patient is unable to extend their wrist after a lateral epicondyle injury?

Accepted Answer

Extensor Carpi Radialis Longus

Question 13

A patient is unable to flex their wrist but can still abduct it. Which muscle is most likely still functioning?

Accepted Answer

Extensor Carpi Radialis Longus

Question 14

Which muscle originates from the medial epicondyle of the humerus and inserts into the metacarpal 5 and pisiform, flexing and adducting the wrist?

Accepted Answer

Flexor Carpi Ulnaris

Question 15

Which of the following muscles is NOT involved in wrist extension?

Accepted Answer

Flexor Carpi Ulnaris

Question 16

A patient can flex their wrist but cannot abduct it. Which muscle is most likely paralyzed?

Accepted Answer

Flexor Carpi Radialis

Question 17

Which muscle is responsible for both wrist extension and adduction, and originates from the lateral epicondyle of the humerus?

Accepted Answer

Extensor Carpi Ulnaris

Question 18

If a patient has difficulty with both wrist extension and finger extension, which muscle is most likely involved?

Accepted Answer

Extensor Digitorum

Question 19

Which muscle is most likely to be used when making a tight fist, due to its insertion into the palmar aponeurosis?

Accepted Answer

Palmaris Longus

Question 20

A patient presents with weakness in wrist flexion and abduction. Which muscle is most likely affected?

Accepted Answer

Flexor Carpi Radialis

Muscles of the Forearm: Origins, Insertions, and Actions

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