Question 1

Which of the carpometacarpal joints is the most stable functioning as the central pillar of the hand?

Accepted Answer

A)  Second
B)  Third
C)  Fourth
D)  FifthE) All of the above
F) B) and C) B

Question 2

Which of the following statements is MOST CORRECT about the longitudinal arch of the hand?

Accepted Answer

A)  Rigid arch, capitate is the keystone of the arch
B)  Passes through all metacarpal heads, third metacarpal is the keystone
C)  Second and third metacarpals are central pillars, and thumb and fourth and fifth digits move around them
D)  Supported by the wrist and extrinsic hand musclesE) A) and D)
F) A) and C)

Question 3

Which of the following muscle groups have a common proximal attachment on the lateral humeral epicondyle and supracondylar ridge?

Accepted Answer

A)  Finger flexors
B)  Wrist flexors
C)  Finger extensors
D)  Wrist extensorsE) A) and C)
F) B) and C)

Question 4

Which of the following carpals are located in the floor of the anatomical snuff box?

Accepted Answer

A)  Lunate, hamate
B)  Scaphoid, trapezium
C)  Hamate, trapezoid
D)  Capitate, scaphoidE) None of the above
F) A) and B)

Question 5

-As shown in the image, what hand muscles are activated to flex the second through fifth metacarpophalangeal joints and extend the corresponding interphalangeal joints?

Accepted Answer

A)  Interossei
B)  Adductor pollicis
C)  Lumbricals
D)  Flexor pollicis longusE) B) and C)
F) A) and D)

Question 6

Weakness in which of the following muscles can result in a clawing posture of the hand?

Accepted Answer

A)  Extensor digitorum
B)  Interossei, lumbricals
C)  Flexor pollicis longus
D)  Opponens pollicis, palmaris brevisE) A) and D)
F) B) and D)

Question 7

What is the MAJOR function of the finger flexor pulley system?

Accepted Answer

A)  Provides nutrition to the tendons
B)  Allows tendons to extend digits
C)  Provides lubrication to the tendons
D)  Allows tendons to conform to curve of digitsE) C) and D)
F) A) and B)

Question 8

A person has 85° of passive right wrist flexion, 45° of extension, and 21° of ulnar and radial deviation.Which directions of motion are limited for this person compared with the average norms?

Accepted Answer

A)  Extension, radial deviation
B)  Flexion, radial deviation
C)  Extension, ulnar deviation
D)  Flexion, ulnar deviationE) All of the above
F) A) and D)

Question 9

What is the function of the wrist muscles during a cylindrical power grip of the hand?

Accepted Answer

A)  Stabilize wrist in slight extension and ulnar deviation
B)  Stabilize wrist in neutral and ulnar deviation
C)  Stabilize wrist in slight extension and radial deviation
D)  Stabilize wrist in neutral and radial deviationE) None of the above
F) C) and D)

Question 10

Which of the following directions is MOST CORRECT to palpate the capitate bone?

Accepted Answer

A)  Palpate proximal to base of third metacarpal bone
B)  Palpate proximal to base of fourth metacarpal bone
C)  Palpate proximal to base of second metacarpal bone
D)  Palpate proximal to base of fifth metacarpal boneE) None of the above
F) All of the above

Question 11

Which of the following bones forms a saddle joint with the base of the first metacarpal?

Accepted Answer

A)  Hamate
B)  Trapezoid
C)  Capitate
D)  TrapeziumE) A) and B)
F) None of the above

Question 12

What motion is produced when extensor carpi ulnaris and flexor carpi ulnaris are activated together?

Accepted Answer

A)  Ulnar deviation
B)  Wrist flexion
C)  Radial deviation
D)  Wrist extensionE) A) and B)
F) B) and D)

Question 13

Which of the following degrees represents the functional position of the wrist and hand?

Accepted Answer

A)  20° wrist extension, 10° ulnar deviation, 45° metacarpophalangeal (MCP)  flexion, 30° proximal interphalangeal (PIP)  flexion, slight distal interphalangeal (DIP)  flexion
B)  Neutral wrist extension, 10° ulnar deviation, 45° MCP flexion, 30° PIP flexion, slight DIP flexion
C)  20° wrist extension, 10° radial deviation, 30° MCP flexion, 20° PIP flexion, slight DIP flexion
D)  45° wrist extension, 10° radial deviation, 30° MCP flexion, 20° PIP flexion, slight DIP flexionE) All of the above
F) C) and D)

Question 14

Which of the following statements BEST describes thumb abduction?

Accepted Answer

A)  Occurs in a plane at a right angle to the palm
B)  Occurs as the metacarpal rotates on the trapezium
C)  Occurs in a plane parallel to the palm
D)  Occurs as the thumb returns from an opposed positionE) B) and C)
F) A) and D)

Question 15

What wrist motion occurs as the wrist moves toward the thumb side in the frontal plane around a sagittal axis?

Accepted Answer

A)  Flexion
B)  Ulnar deviation
C)  Extension
D)  Radial deviationE) B) and C)
F) All of the above

Question 16

A person with a C6 spinal cord injury uses a tenodesis action at the wrist and hand to pick up objects.Which of the following statements BEST describes hand muscle function to grasp the object during this action?

Accepted Answer

A)  Isometric contraction of finger flexors with concentric contraction of wrist extensors
B)  Isometric contraction of finger flexors and wrist extensors
C)  Concentric contraction of wrist extensors with passive stretching of finger flexors
D)  Eccentric contraction of wrist extensors with passive stretching of finger flexorsE) All of the above
F) A) and C) C

Question 17

Which of the following statements BEST describes hand mobility that allows greater closure of the hand?

Accepted Answer

A)  Available joint range of motion increases in first three digits then decreases for fourth and fifth digits
B)  Available joint range of motion increases from radial to ulnar aspects of the hand
C)  Available joint range of motion remains the same from radial to ulnar aspects of the hand
D)  Available joint range of motion increases from ulnar to radial aspects of the handE) B) and D)
F) None of the above

Question 18

Which of the following muscles stabilize the wrist during a powerful grip by the hand?

Accepted Answer

A)  Flexor carpi radialis, flexor carpi ulnaris
B)  Extensor carpi radialis longus, extensor carpi radialis brevis, extensor carpi ulnaris
C)  Flexor digitorum profundus, flexor pollicis longus
D)  Extensor digitorum, extensor carpi radialis longusE) B) and C)
F) C) and D)

Question 19

What is the function of the wrist flexor and extensor retinaculum?

Accepted Answer

A)  Increases strength of finger flexor and extensor muscles
B)  Protects the carpals against fractures
C)  Counters ulnar and radial deviation stresses
D)  Prevents bowstringing of finger flexor and extensor tendonsE) A) and C)
F) A) and B)

Question 20

Which of the following grips is MOST LIKELY to be used to carry an object over a sustained period of time?

Accepted Answer

A)  Hook
B)  Precision
C)  Power
D)  Pulp-to-pulpE) C) and D)
F) B) and C) A

Exam 10: Structure and Function of the Wrist and Hand Complex

Which of the carpometacarpal joints is the most stable functioning as the central pillar of the hand?

Correct AnswerverifiedB

Which of the following statements is MOST CORRECT about the longitudinal arch of the hand?

Correct AnswerverifiedShow Answer

Which of the following muscle groups have a common proximal attachment on the lateral humeral epicondyle and supracondylar ridge?

Correct AnswerverifiedShow Answer

Which of the following carpals are located in the floor of the anatomical snuff box?

Correct AnswerverifiedShow Answer

-As shown in the image, what hand muscles are activated to flex the second through fifth metacarpophalangeal joints and extend the corresponding interphalangeal joints?

Correct AnswerverifiedShow Answer

Weakness in which of the following muscles can result in a clawing posture of the hand?

Correct AnswerverifiedShow Answer

What is the MAJOR function of the finger flexor pulley system?

Correct AnswerverifiedShow Answer

A person has 85° of passive right wrist flexion, 45° of extension, and 21° of ulnar and radial deviation.Which directions of motion are limited for this person compared with the average norms?

Correct AnswerverifiedShow Answer

What is the function of the wrist muscles during a cylindrical power grip of the hand?

Correct AnswerverifiedShow Answer

Which of the following directions is MOST CORRECT to palpate the capitate bone?

Correct AnswerverifiedShow Answer

Which of the following bones forms a saddle joint with the base of the first metacarpal?

Correct AnswerverifiedShow Answer

What motion is produced when extensor carpi ulnaris and flexor carpi ulnaris are activated together?

Correct AnswerverifiedShow Answer

Which of the following degrees represents the functional position of the wrist and hand?

Correct AnswerverifiedShow Answer

Which of the following statements BEST describes thumb abduction?

Correct AnswerverifiedShow Answer

What wrist motion occurs as the wrist moves toward the thumb side in the frontal plane around a sagittal axis?

Correct AnswerverifiedShow Answer

A person with a C6 spinal cord injury uses a tenodesis action at the wrist and hand to pick up objects.Which of the following statements BEST describes hand muscle function to grasp the object during this action?

Correct AnswerverifiedC

Which of the following statements BEST describes hand mobility that allows greater closure of the hand?

Correct AnswerverifiedShow Answer

Which of the following muscles stabilize the wrist during a powerful grip by the hand?

Correct AnswerverifiedShow Answer

What is the function of the wrist flexor and extensor retinaculum?

Correct AnswerverifiedShow Answer

Which of the following grips is MOST LIKELY to be used to carry an object over a sustained period of time?

Correct AnswerverifiedA

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B

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C

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A