Question 1

The intrinsic muscle mass on the little finger side of the palm is made up of which set of muscles?&#10;A) Thenar muscles&#10;B) Radial muscles&#10;C) Opponens muscles&#10;D) Hypothenar muscles

Accepted Answer

The intrinsic muscle mass on the little finger side of the palm is known as the hypothenar muscles. The thenar muscles are located on the thumb side of the palm, the radial muscles are located on the side of the palm closest to the radius bone, and the opponens muscles are located near the base of the thumb.

Question 2

Which muscle originates on the flexor digitorum profundus tendon and inserts on the tendon of the extensor digitorum muscle?&#10;A) Palmar interossei&#10;B) Dorsal interossei&#10;C) Flexor pollicis brevis&#10;D) Lumbricales

Accepted Answer

The lumbricales are the only muscles that originate on the flexor digitorum profundus tendon and insert on the tendon of the extensor digitorum muscle. The palmar and dorsal interossei originate and insert on the metacarpals, while the flexor pollicis brevis originates on the radius and inserts on the thumb.

Question 3

Which muscle originates on the medial humeral epicondyle and inserts at the sides of the middle phalanges of the fingers?&#10;A) Flexor digitorum profundus&#10;B) Extensor digitorum&#10;C) Extensor digiti minimi&#10;D) Flexor digitorum superficialis

Accepted Answer

Flexor digitorum superficialis originates on the medial epicondyle of the humerus and inserts at the sides of the middle phalanges of the fingers. It is responsible for flexing the fingers at the proximal interphalangeal joints.

Question 4

The flexor digitorum superficialis muscle flexes all but which of the following joints of the fingers?&#10;A) Distal interphalangeal joints (DIP)&#10;B) Proximal interphalangeal joints (PIP)&#10;C) Metacarpophalangeal joints (MCP)&#10;D) This muscle flexes all of these joints.

Accepted Answer

The flexor digitorum superficialis muscle flexes the PIP and MCP joints of the fingers, but not the DIP joint. The flexor digitorum profundus muscle is responsible for flexing the DIP joint.

Question 5

Your patient had trauma to the ulnar nerve and cannot actively abduct and adduct her fingers.You note weakness of which of the following muscles as a result of this?&#10;A) Lumbricales three and four&#10;B) Opponens digiti minimi&#10;C) Dorsal and palmar interossei&#10;D) Flexor digiti minimi

Accepted Answer

The dorsal and palmar interossei are responsible for abduction and adduction of the fingers, respectively, and are innervated by the ulnar nerve. Therefore, weakness of these muscles would result from ulnar nerve trauma, as described in the question. The lumbricales three and four are also innervated by the ulnar nerve but they are responsible for flexion of the MCP joint and extension of the IP joint. The opponens digiti minimi is innervated by the deep branch of the ulnar nerve and is responsible for opposing the little finger. The flexor digiti minimi is innervated by the ulnar nerve and is responsible for flexion of the fifth finger. None of these muscles are specifically responsible for finger abduction or adduction.

Question 6

Which muscle originates on the lateral humeral epicondyle and inserts at the base of the distal phalanx of the fifth finger?&#10;A) Palmaris longus&#10;B) Extensor digiti minimi&#10;C) Flexor digiti minimi&#10;D) Extensor indicis

Accepted Answer

The muscle that originates on the lateral humeral epicondyle and inserts at the base of the distal phalanx of the fifth finger is the Extensor digiti minimi. Palmaris longus originates on the medial epicondyle of the humerus and Flexor digiti minimi originates on the pisiform bone. Extensor indicis originates on the posterior shaft of the ulna and the interosseous membrane.

Question 7

With the palm down on the table,raise the second finger off the table.This requires muscle action of the&#10;A) flexor digitorum longus.&#10;B) flexor indicis.&#10;C) extensor indicis.&#10;D) extensor digiti minimi.

Accepted Answer

The extensor indicis muscle is responsible for extending the index finger and can also aid in extending the middle finger when the index finger is fixed. Therefore, it is the muscle responsible for raising the second finger off the table when the palm is down. The flexor digitorum longus muscle is responsible for flexing the toes, not the fingers. The flexor indicis muscle is responsible for flexion of the index finger, not extension. The extensor digiti minimi muscle is responsible for extending the fifth finger and wrist.

Question 8

Which type of grip is used to grasp a plate?&#10;A) Lumbrical grip&#10;B) Pincer grip&#10;C) Cylindrical grip&#10;D) Spherical grip

Accepted Answer

The answer of Which type of grip is used to...

Question 9

Damage to the radial nerve would impair all of the following muscles EXCEPT the&#10;A) extensor digitorum.&#10;B) extensor pollicis longus.&#10;C) flexor pollicis longus.&#10;D) extensor digiti minimi.

Accepted Answer

The flexor pollicis longus is innervated by the median nerve, not the radial nerve. The extensor digitorum, extensor pollicis longus, and extensor digiti minimi are all innervated by the radial nerve.

Question 10

Which muscle does NOT make up the anatomical snuffbox?&#10;A) Abductor pollicis brevis&#10;B) Extensor pollicis brevis&#10;C) Extensor pollicis longus&#10;D) Abductor pollicis longus

Accepted Answer

The anatomical snuffbox is formed by the tendons of the extensor pollicis brevis, extensor pollicis longus, and abductor pollicis longus muscles. The abductor pollicis brevis does not contribute to the formation of the snuffbox.

Question 11

Which muscle originates on the scaphoid,trapezium,and flexor retinaculum and inserts on the proximal phalanx of the thumb?&#10;A) Abductor pollicis brevis&#10;B) Opponens pollicis&#10;C) Flexor digiti minimi&#10;D) Abductor digiti minimi

Accepted Answer

The answer of Which muscle originates on the scaphoid,trapezium,and flexor...

Question 12

Which bony arch is formed by the heads of the metacarpals?&#10;A) Lumbrical arch&#10;B) Proximal carpal arch&#10;C) Distal carpal arch&#10;D) Longitudinal arch

Accepted Answer

The answer of Which bony arch is formed by the...

Question 13

Which type of grip is used to hold on to a walker handle?&#10;A) Lumbrical grip&#10;B) Pincer grip&#10;C) Cylindrical grip&#10;D) Spherical grip

Accepted Answer

The answer of Which type of grip is used to...

Question 14

The functional position of the hand includes all of the following joint positions EXCEPT&#10;A) some wrist flexion.&#10;B) flexion of the metacarpophalangeal and interphalangeal joints.&#10;C) the thumb in slight opposition.&#10;D) some wrist extension.

Accepted Answer

The answer of The functional position of the hand includes...

Question 15

Which muscle originates on the hamate and flexor retinaculum and inserts on the fifth metacarpal?&#10;A) Opponens pollicis&#10;B) Opponens digiti minimi&#10;C) Lumbricales&#10;D) Palmar interossei

Accepted Answer

The answer of Which muscle originates on the hamate and...

Question 16

A person with inflammation in the carpal tunnel could have weakness in any of the following muscles EXCEPT the&#10;A) extensor digitorum.&#10;B) flexor digitorum superficialis.&#10;C) flexor digitorum profundus.&#10;D) abductor pollicis brevis.

Accepted Answer

The answer of A person with inflammation in the carpal...

Question 17

Which type of grip is used to grasp the rim of a wheelchair?&#10;A) Lumbrical grip&#10;B) Pincer grip&#10;C) Cylindrical grip&#10;D) Spherical grip

Accepted Answer

The answer of Which type of grip is used to...

Question 18

Which type of grip is used to pick up a coin?&#10;A) Lumbrical grip&#10;B) Pincer grip&#10;C) Cylindrical grip&#10;D) Spherical grip

Accepted Answer

The answer of Which type of grip is used to...

Question 19

Which muscle originates on the humeral lateral condyle and inserts at the base of the distal phalanges of the four fingers?&#10;A) Flexor digitorum profundus&#10;B) Extensor digitorum&#10;C) Flexor digitorum superficialis&#10;D) Extensor carpi radialis longus

Accepted Answer

The answer of Which muscle originates on the humeral lateral...

Question 20

The structure that spans the posterior side of the wrist from the ulnar styloid process to the lateral radius is called the&#10;A) flexor retinaculum.&#10;B) extensor retinaculum.&#10;C) extensor hood.&#10;D) palmar carpal ligament.

Accepted Answer

The answer of The structure that spans the posterior side...

Question 21

Which carpal bone makes up the floor of the anatomical snuffbox and is the most frequently fractured carpal bone?&#10;A) Capitate&#10;B) Lunate&#10;C) Scaphoid&#10;D) Pisiform

Accepted Answer

The answer of Which carpal bone makes up the floor...

Question 22

Carpal tunnel syndrome involves compression of which of the following nerves?&#10;A) Radial&#10;B) Ulnar&#10;C) Median&#10;D) Brachial

Accepted Answer

The answer of Carpal tunnel syndrome involves compression of which...

Deck 13: Hand