Question 1

Where would you position the elbow joint to optimize the biomechanical effects of both the brachialis and the biceps brachii?

Accepted Answer

At 90° of elbow flexion,the moment arms of the muscles are maximal.Optimal length occurs at approximately 60° of flexion.Peak torque will occur between 60° and 90°,but closer to 90°.

Question 2

Which of the following would you consider to be a limiter of motion when a patient cannot achieve full elbow extension?

Accepted Answer

A)  Passive tension of the flexor muscles 
B)  Tension in the posterior ligaments 
C)  Passive tension of the elbow extensor muscles 
D)  Posterior capsular tightness 
A)  Passive tension of the flexor muscles 
B)  Tension in the posterior ligaments 
C)  Passive tension of the elbow extensor muscles 
D)  Posterior capsular tightness A

Question 3

Which of the following describes the arthrokinematic motion that occurs at the humeroulnar joint when the elbow is flexing to bring your hand to your mouth?

Accepted Answer

A)  Caudal/anterior/cephalic glide of ulna on trochlea; medial glide of ulna on trochlea 
B)  Cephalic/posterior/caudal glide of ulna on trochlea; medial glide of ulna on trochlea 
C)  Caudal/anterior/cephalic glide of ulna on trochlea; lateral glide of ulna on trochlea 
D)  Cephalic/posterior/caudal glide of ulna on trochlea; lateral glide of ulna on trochlea 
A)  Caudal/anterior/cephalic glide of ulna on trochlea; medial glide of ulna on trochlea 
B)  Cephalic/posterior/caudal glide of ulna on trochlea; medial glide of ulna on trochlea 
C)  Caudal/anterior/cephalic glide of ulna on trochlea; lateral glide of ulna on trochlea 
D)  Cephalic/posterior/caudal glide of ulna on trochlea; lateral glide of ulna on trochlea C

Question 4

What is the causative mechanism and the structure(s)involved in "tennis elbow"?

Accepted Answer

Tennis elbow is presumed to be

Question 5

What causes the carrying angle of the elbow joint? What functional purpose does the carrying angle serve?

Accepted Answer

The carrying angle is created by the obl

Question 6

Which of the following groups of soft tissue structures could potentially limit full forearm supination?

Accepted Answer

A)  Oblique cord,quadrate ligament,distal palmar radioulnar ligament 
B)  Lateral collateral ligament,oblique cord,distal anterior radioulnar ligament 
C)  Quadrate ligament,distal posterior radioulnar ligament,oblique cord 
D)  Distal posterior radioulnar ligament,interosseous membrane,oblique cord 
A)  Oblique cord,quadrate ligament,distal palmar radioulnar ligament 
B)  Lateral collateral ligament,oblique cord,distal anterior radioulnar ligament 
C)  Quadrate ligament,distal posterior radioulnar ligament,oblique cord 
D)  Distal posterior radioulnar ligament,interosseous membrane,oblique cord

Question 7

The ________________radioulnar joint has a disc that is also known as ____________________.

Accepted Answer

A)  superior,annular ligament 
B)  superior,triangular fibrocartilage complex (TF
C)  
C)  inferior,annular ligament 
D)  inferior,triangular fibrocartilage complex (TF
C)  
A)  superior,annular ligament 
B)  superior,triangular fibrocartilage complex (TF
C)  
C)  inferior,annular ligament 
D)  inferior,triangular fibrocartilage complex (TF
C)

Question 8

Which of the following elbow flexors produces the greatest amount of compression in the elbow joint and therefore is a stabilizer of the elbow?

Accepted Answer

A)  Biceps brachii 
B)  Pronator teres 
C)  Brachioradialis 
D)  Brachialis 
A)  Biceps brachii 
B)  Pronator teres 
C)  Brachioradialis 
D)  Brachialis

Question 9

What is the causative mechanism and the structure(s)involved in avascular necrosis of the radial head?

Accepted Answer

Avascular necrosis of the radial head is

Question 10

If there is no angulation between the long axis of the humerus and the long axis of the forearm,what condition exists?

Accepted Answer

Cubitus varus (decre

Question 11

During elbow extension from 90° flexion at the humeroradial joint,the radial head rolls in a(n)________________direction and glides in a(n)________________direction on the capitulum at the humeroradial joint.

Accepted Answer

A)  anterior/cephalic,posterior/inferior 
B)  posterior/caudal,posterior/inferior 
C)  anterior/cephalic,anterior/inferior 
D)  posterior/caudal,anterior/inferior 
A)  anterior/cephalic,posterior/inferior 
B)  posterior/caudal,posterior/inferior 
C)  anterior/cephalic,anterior/inferior 
D)  posterior/caudal,anterior/inferior

Question 12

Which of the following muscles helps to support the medial collateral ligament when exposed to large valgus forces?

Accepted Answer

A)  Brachioradialis 
B)  Flexor carpi ulnaris 
C)  Pronator quadrates 
D)  Anconeus 
A)  Brachioradialis 
B)  Flexor carpi ulnaris 
C)  Pronator quadrates 
D)  Anconeus

Question 13

What is the causative mechanism and the structure(s)involved in "cubital tunnel syndrome"?

Accepted Answer

Cubital tunnel syndrome is compression o

Question 14

When unresisted elbow extension against gravity is required,which of the elbow extensors is/are active?

Accepted Answer

The medial head of the triceps is the fi

Question 15

When the elbow is flexed using a lot of speed with the forearm in neutral (midposition),which elbow flexors are active?

Accepted Answer

Elbow joint muscles that cross only the

Question 16

What is the causative mechanism and the structure(s)involved in "Nursemaid's elbow"?

Accepted Answer

Nursemaid's elbow is a dislocation of th

Question 17

In which position is the central band of the interosseous membrane the most taut?

Accepted Answer

A)  Midway between supination and pronation 
B)  At full supination 
C)  At full pronation 
A)  Midway between supination and pronation 
B)  At full supination 
C)  At full pronation

Question 18

In full elbow extension,varus stability is provided by which of the following bony and/or noncontractile soft tissue structures?

Accepted Answer

A)  Configuration of the joint surfaces,medial collateral ligament,anterior ligament 
B)  Posterior ligament,configuration of the joint surfaces,annular ligament 
C)  Oblique cord,quadrate ligament,configuration of the joint surfaces 
D)  Configuration of the joint surfaces,joint capsule,lateral collateral ligament 
A)  Configuration of the joint surfaces,medial collateral ligament,anterior ligament 
B)  Posterior ligament,configuration of the joint surfaces,annular ligament 
C)  Oblique cord,quadrate ligament,configuration of the joint surfaces 
D)  Configuration of the joint surfaces,joint capsule,lateral collateral ligament

Question 19

Which of the following muscles works to dynamically support the distal radioulnar joint?

Accepted Answer

A)  Pronator quadratus 
B)  Pronator teres 
C)  Flexor carpi radialis longus 
D)  Palmaris longus 
A)  Pronator quadratus 
B)  Pronator teres 
C)  Flexor carpi radialis longus 
D)  Palmaris longus

Question 20

A football offensive lineman takes his three-point stance.The base of support (BOS)includes 1 upper extremity (hand placed on ground)and both lower extremities with his right elbow in 30° of flexion.Which of the following would best resist a valgus stress applied to the humeroulnar joint by an opposing player?

Accepted Answer

A)  Lateral collateral ligament 
B)  Anterior medial collateral ligament 
C)  Lateral ulnar collateral ligament 
D)  Posterior medial collateral ligament 
A)  Lateral collateral ligament 
B)  Anterior medial collateral ligament 
C)  Lateral ulnar collateral ligament 
D)  Posterior medial collateral ligament

Where would you position the elbow joint to optimize the biomechanical effects of both the brachialis and the biceps brachii?

Which of the following would you consider to be a limiter of motion when a patient cannot achieve full elbow extension?

Which of the following describes the arthrokinematic motion that occurs at the humeroulnar joint when the elbow is flexing to bring your hand to your mouth?

What is the causative mechanism and the structure(s)involved in "tennis elbow"?

What causes the carrying angle of the elbow joint? What functional purpose does the carrying angle serve?

Which of the following groups of soft tissue structures could potentially limit full forearm supination?

The radioulnar joint has a disc that is also known as ____.

Which of the following elbow flexors produces the greatest amount of compression in the elbow joint and therefore is a stabilizer of the elbow?

What is the causative mechanism and the structure(s)involved in avascular necrosis of the radial head?

If there is no angulation between the long axis of the humerus and the long axis of the forearm,what condition exists?

During elbow extension from 90° flexion at the humeroradial joint,the radial head rolls in a(n)direction and glides in a(n)direction on the capitulum at the humeroradial joint.

Which of the following muscles helps to support the medial collateral ligament when exposed to large valgus forces?

What is the causative mechanism and the structure(s)involved in "cubital tunnel syndrome"?

When unresisted elbow extension against gravity is required,which of the elbow extensors is/are active?

When the elbow is flexed using a lot of speed with the forearm in neutral (midposition),which elbow flexors are active?

What is the causative mechanism and the structure(s)involved in "Nursemaid's elbow"?

In which position is the central band of the interosseous membrane the most taut?

In full elbow extension,varus stability is provided by which of the following bony and/or noncontractile soft tissue structures?

Which of the following muscles works to dynamically support the distal radioulnar joint?

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 Wrist and Hand Complex

The Hip Complex

The Knee Complex

The Ankle and Foot Complex

Filters

Exam 8: The Elbow Complex

Where would you position the elbow joint to optimize the biomechanical effects of both the brachialis and the biceps brachii?

Which of the following would you consider to be a limiter of motion when a patient cannot achieve full elbow extension?

Which of the following describes the arthrokinematic motion that occurs at the humeroulnar joint when the elbow is flexing to bring your hand to your mouth?

What is the causative mechanism and the structure(s)involved in "tennis elbow"?

What causes the carrying angle of the elbow joint? What functional purpose does the carrying angle serve?

Which of the following groups of soft tissue structures could potentially limit full forearm supination?

The ________________radioulnar joint has a disc that is also known as ____________________.

Which of the following elbow flexors produces the greatest amount of compression in the elbow joint and therefore is a stabilizer of the elbow?

What is the causative mechanism and the structure(s)involved in avascular necrosis of the radial head?

If there is no angulation between the long axis of the humerus and the long axis of the forearm,what condition exists?

During elbow extension from 90° flexion at the humeroradial joint,the radial head rolls in a(n)________________direction and glides in a(n)________________direction on the capitulum at the humeroradial joint.

Which of the following muscles helps to support the medial collateral ligament when exposed to large valgus forces?

What is the causative mechanism and the structure(s)involved in "cubital tunnel syndrome"?

When unresisted elbow extension against gravity is required,which of the elbow extensors is/are active?

When the elbow is flexed using a lot of speed with the forearm in neutral (midposition),which elbow flexors are active?

What is the causative mechanism and the structure(s)involved in "Nursemaid's elbow"?

In which position is the central band of the interosseous membrane the most taut?

In full elbow extension,varus stability is provided by which of the following bony and/or noncontractile soft tissue structures?

Which of the following muscles works to dynamically support the distal radioulnar joint?

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 Wrist and Hand Complex

The Hip Complex

The Knee Complex

The Ankle and Foot Complex

Filters

The radioulnar joint has a disc that is also known as ____.

During elbow extension from 90° flexion at the humeroradial joint,the radial head rolls in a(n)direction and glides in a(n)direction on the capitulum at the humeroradial joint.