Question 1

What metacarpophalangeal (MCP)joint position is most prone to injury and why?

Accepted Answer

MCP extension is more vulnerable than flexion,because flexion is the close-packed position for the MCP joint.When the joint is close-packed,all the ligaments and capsule are maximally taut,drawing the joint surfaces together and increasing stability.In extension,that capsule is loose-packed and more vulnerable to shear and torsional forces across the joint surfaces.

Question 2

Extension of the metacarpophalangeal (MCP)joint of the second digit results in a ________________roll and a ________________glide of the proximal phalanx on the metacarpal.

Accepted Answer

A)  dorsal,dorsal 
B)  volar,volar 
C)  dorsal,volar 
D)  volar,dorsal 
A)  dorsal,dorsal 
B)  volar,volar 
C)  dorsal,volar 
D)  volar,dorsal A

Question 3

Which of the following factors would explain why there is a weaker grip on the ulnar side of the hand?

Accepted Answer

A)  Active finger flexion range of motion (ROM)increases from the radial to the ulnar side of the hand,lending to increased occurrence of active insufficiency of the ulnar digits. 
B)  Active finger flexion ROM increases from the ulnar to the radial side of the hand,lending to increased occurrence of active insufficiency of the radial digits. 
C)  Active finger flexion is the same in all fingers. 
D)  Weaker grip is not possible with the ulnar side of the hand. 
A)  Active finger flexion range of motion (ROM)increases from the radial to the ulnar side of the hand,lending to increased occurrence of active insufficiency of the ulnar digits. 
B)  Active finger flexion ROM increases from the ulnar to the radial side of the hand,lending to increased occurrence of active insufficiency of the radial digits. 
C)  Active finger flexion is the same in all fingers. 
D)  Weaker grip is not possible with the ulnar side of the hand. A

Question 4

What requirement does spherical grip have that differentiates it from a cylindrical grip?

Accepted Answer

Spherical grip requires that t

Question 5

Describe the attachments of the interossei and lumbricales to the extensor mechanism.How do these attachments enable these muscles to contribute to interphalangeal (IP)extension?

Accepted Answer

The "proximal" interossei (each metacarp

Question 6

If finger flexion strength is measured at each extreme of the four wrist motions,which position is least effective for grasp? If wrist positions were combined (multiplanar),which would give the most effective grip?

Accepted Answer

When grip strength is measured at the en

Question 7

Why is it hypothesized that the ECU is active during wrist flexion?

Accepted Answer

The hypothesis that accounts for the une

Question 8

Which of the following carpal bones shows the greatest amount of motion during wrist flexion/extension?

Accepted Answer

A)  Scaphoid 
B)  Lunate 
C)  Triquitrum 
D)  Pisaform 
A)  Scaphoid 
B)  Lunate 
C)  Triquitrum 
D)  Pisaform

Question 9

Which of the following best represents the closed pack position of the wrist?

Accepted Answer

A)  15° wrist flexion 
B)  10° wrist extension 
C)  Full wrist flexion 
D)  Full wrist extension 
A)  15° wrist flexion 
B)  10° wrist extension 
C)  Full wrist flexion 
D)  Full wrist extension

Question 10

What role does the transverse metacarpal ligament play at the carpometacarpal (CMC)joint? What role at the metacarpophalangeal (MCP)joint?

Accepted Answer

The transversal metacarpal ligament prev

Question 11

In abduction of the first carpometacarpal (CMC)joint,the first metacarpal would roll in a ________________direction and glide in a ________________direction on the trapezium.

Accepted Answer

A)  volar,dorsal 
B)  radial,ulnar 
C)  volar,volar 
D)  radial,radial 
A)  volar,dorsal 
B)  radial,ulnar 
C)  volar,volar 
D)  radial,radial

Question 12

Which of the following is the anatomical basis of the longitudinal palmar arch?

Accepted Answer

A)  The adjustable positions of the first,fourth,and fifth metacarpals around the fixed second and third metacarpals,and the musculature of the flexor digitorum profundus (FDP)and flexor digitorum superficialis (FDS) 
B)  The fact that the third metacarpal is the longest bone in the hand 
C)  The relatively mobile unit formed by the second and third metacarpal as they articulate with the trapezium and trapezoid,and the musculature of the FDP and FDS 
D)  The carpal arch 
A)  The adjustable positions of the first,fourth,and fifth metacarpals around the fixed second and third metacarpals,and the musculature of the flexor digitorum profundus (FDP)and flexor digitorum superficialis (FDS) 
B)  The fact that the third metacarpal is the longest bone in the hand 
C)  The relatively mobile unit formed by the second and third metacarpal as they articulate with the trapezium and trapezoid,and the musculature of the FDP and FDS 
D)  The carpal arch

Question 13

The purpose of the volar plate of the metacarpophalangeal (MCP)joint of the finger is to:

Accepted Answer

A)  Restrict MCP joint mobility. 
B)  Act as a point of insertion for the interossei muscles and extensor digitorum. 
C)  Prevent pinching of the long flexor tendons during finger flexion. 
D)  Add surface area to the head of the metacarpal. 
A)  Restrict MCP joint mobility. 
B)  Act as a point of insertion for the interossei muscles and extensor digitorum. 
C)  Prevent pinching of the long flexor tendons during finger flexion. 
D)  Add surface area to the head of the metacarpal.

Question 14

What are the annular pulleys (vaginal ligaments)? Where are they found and what function(s)do they serve?

Accepted Answer

The annular pulleys are fibrous bands fo

Question 15

Which of the following muscles is the primary finger flexor of digits two through five?

Accepted Answer

A)  Flexor digitorum superficialis (FDS) 
B)  Flexor digitorum profundus (FDP) 
C)  Lumbricales 
D)  Interossei 
A)  Flexor digitorum superficialis (FDS) 
B)  Flexor digitorum profundus (FDP) 
C)  Lumbricales 
D)  Interossei

Question 16

Your patient demonstrates limited wrist flexion.Which of the following ligaments would be taut in full wrist flexion?

Accepted Answer

A)  Volar radiocarpal ligaments 
B)  Dorsal radiocarpal ligaments 
C)  Radial collateral ligament 
D)  Quadrate ligament 
A)  Volar radiocarpal ligaments 
B)  Dorsal radiocarpal ligaments 
C)  Radial collateral ligament 
D)  Quadrate ligament

Question 17

What is the finest (most precise)form of prehension that can be accomplished by someone without intact intrinsic or extrinsic hand function?

Accepted Answer

Pad-to-side prehension can be

Question 18

The range and direction of motion at the first carpometacarpal (CMC)joint produces opposition of the thumb.Opposition is sequentially ____________________.

Accepted Answer

A)  abduction,flexion,and adduction of the first metacarpal 
B)  adduction,flexion,and abduction of the first metacarpal 
C)  abduction,extension,and adduction of the first metacarpal 
D)  Opposition does not occur at this joint. 
A)  abduction,flexion,and adduction of the first metacarpal 
B)  adduction,flexion,and abduction of the first metacarpal 
C)  abduction,extension,and adduction of the first metacarpal 
D)  Opposition does not occur at this joint.

Question 19

In which of the following types of grip does the thumb play a very minimal role?

Accepted Answer

A)  Hook grip 
B)  Tip-to-tip prehension 
C)  Spherical grip 
D)  Cylindrical grip 
A)  Hook grip 
B)  Tip-to-tip prehension 
C)  Spherical grip 
D)  Cylindrical grip

Question 20

Which of the following is true regarding the proximal interphalangeal (PIP)and distal interphalangeal (DIP)joints of the digits two through five?

Accepted Answer

A)  They are not true synovial joints. 
B)  They do not have any collateral ligaments to resist valgus and varus stresses. 
C)  The proximal articulating surface is larger than the distal articulating surface. 
D)  They are biaxial joints with two degrees of freedom. 
A)  They are not true synovial joints. 
B)  They do not have any collateral ligaments to resist valgus and varus stresses. 
C)  The proximal articulating surface is larger than the distal articulating surface. 
D)  They are biaxial joints with two degrees of freedom.

What metacarpophalangeal (MCP)joint position is most prone to injury and why?

Extension of the metacarpophalangeal (MCP)joint of the second digit results in a roll and a glide of the proximal phalanx on the metacarpal.

Which of the following factors would explain why there is a weaker grip on the ulnar side of the hand?

What requirement does spherical grip have that differentiates it from a cylindrical grip?

Describe the attachments of the interossei and lumbricales to the extensor mechanism.How do these attachments enable these muscles to contribute to interphalangeal (IP)extension?

If finger flexion strength is measured at each extreme of the four wrist motions,which position is least effective for grasp? If wrist positions were combined (multiplanar),which would give the most effective grip?

Why is it hypothesized that the ECU is active during wrist flexion?

Which of the following carpal bones shows the greatest amount of motion during wrist flexion/extension?

Which of the following best represents the closed pack position of the wrist?

What role does the transverse metacarpal ligament play at the carpometacarpal (CMC)joint? What role at the metacarpophalangeal (MCP)joint?

In abduction of the first carpometacarpal (CMC)joint,the first metacarpal would roll in a direction and glide in a direction on the trapezium.

Which of the following is the anatomical basis of the longitudinal palmar arch?

The purpose of the volar plate of the metacarpophalangeal (MCP)joint of the finger is to:

What are the annular pulleys (vaginal ligaments)? Where are they found and what function(s)do they serve?

Which of the following muscles is the primary finger flexor of digits two through five?

Your patient demonstrates limited wrist flexion.Which of the following ligaments would be taut in full wrist flexion?

What is the finest (most precise)form of prehension that can be accomplished by someone without intact intrinsic or extrinsic hand function?

The range and direction of motion at the first carpometacarpal (CMC)joint produces opposition of the thumb.Opposition is sequentially ____________________.

In which of the following types of grip does the thumb play a very minimal role?

Which of the following is true regarding the proximal interphalangeal (PIP)and distal interphalangeal (DIP)joints of the digits two through five?

Biomechanical Applications to Joint Structure and Function

Joint Structure and Function

Muscle Structure and Function

The Vertebral Column

The Thorax and Chest Wall

The Temporomandibular Joint

The Shoulder Complex

The Elbow Complex

The Hip Complex

The Knee Complex

The Ankle and Foot Complex

Filters

Exam 9: The Wrist and Hand Complex

What metacarpophalangeal (MCP)joint position is most prone to injury and why?

Extension of the metacarpophalangeal (MCP)joint of the second digit results in a ________________roll and a ________________glide of the proximal phalanx on the metacarpal.

Which of the following factors would explain why there is a weaker grip on the ulnar side of the hand?

What requirement does spherical grip have that differentiates it from a cylindrical grip?

Describe the attachments of the interossei and lumbricales to the extensor mechanism.How do these attachments enable these muscles to contribute to interphalangeal (IP)extension?

If finger flexion strength is measured at each extreme of the four wrist motions,which position is least effective for grasp? If wrist positions were combined (multiplanar),which would give the most effective grip?

Why is it hypothesized that the ECU is active during wrist flexion?

Which of the following carpal bones shows the greatest amount of motion during wrist flexion/extension?

Which of the following best represents the closed pack position of the wrist?

What role does the transverse metacarpal ligament play at the carpometacarpal (CMC)joint? What role at the metacarpophalangeal (MCP)joint?

In abduction of the first carpometacarpal (CMC)joint,the first metacarpal would roll in a ________________direction and glide in a ________________direction on the trapezium.

Which of the following is the anatomical basis of the longitudinal palmar arch?

The purpose of the volar plate of the metacarpophalangeal (MCP)joint of the finger is to:

What are the annular pulleys (vaginal ligaments)? Where are they found and what function(s)do they serve?

Which of the following muscles is the primary finger flexor of digits two through five?

Your patient demonstrates limited wrist flexion.Which of the following ligaments would be taut in full wrist flexion?

What is the finest (most precise)form of prehension that can be accomplished by someone without intact intrinsic or extrinsic hand function?

The range and direction of motion at the first carpometacarpal (CMC)joint produces opposition of the thumb.Opposition is sequentially ____________________.

In which of the following types of grip does the thumb play a very minimal role?

Which of the following is true regarding the proximal interphalangeal (PIP)and distal interphalangeal (DIP)joints of the digits two through five?

Biomechanical Applications to Joint Structure and Function

Joint Structure and Function

Muscle Structure and Function

The Vertebral Column

The Thorax and Chest Wall

The Temporomandibular Joint

The Shoulder Complex

The Elbow Complex

The Hip Complex

The Knee Complex

The Ankle and Foot Complex

Filters

Extension of the metacarpophalangeal (MCP)joint of the second digit results in a roll and a glide of the proximal phalanx on the metacarpal.

In abduction of the first carpometacarpal (CMC)joint,the first metacarpal would roll in a direction and glide in a direction on the trapezium.