Question 1

Because muscles are stretched when moved in the opposite direction of their function when activated, which of the following motions to end range would stretch the long head of the triceps muscle?&#10;A)Shoulder and elbow flexion&#10;B)Elbow extension&#10;C)Shoulder and elbow extension&#10;D)Elbow flexion

Accepted Answer

The long head of the triceps muscle crosses both the shoulder and elbow joints, and its primary functions include elbow extension and assisting in shoulder extension. Therefore, to stretch the long head of the triceps, you would move the joints in the opposite direction of its function, which is shoulder and elbow flexion.

Question 2

Which of the following muscle(s) functions (function) as a primary supinator muscle of the forearm?&#10;A)Supinator, triceps&#10;B)Supinator&#10;C)Supinator, biceps brachii&#10;D)Biceps brachii

Accepted Answer

The Supinator and biceps brachii both function as primary supinator muscles of the forearm. The triceps is not involved in forearm supination.

Question 3

What is the average active range of elbow flexion required for MOST functional activities?&#10;A)30&#176;-130&#176;&#10;B)0&#176;-140&#176;&#10;C)30&#176;-160&#176;&#10;D)0&#176;-170&#176;

Accepted Answer

The range of motion for elbow flexion required for most functional activities is generally accepted to be between 30 and 130 degrees. This range allows for adequate function in activities such as reaching, lifting, and manipulating objects. Options B, C, and D all exceed this typical range and would likely indicate a substantial limitation in elbow function.

Question 4

A person sustains a tear to the proximal attachment of the long head of the biceps.Which of the following movements are MOST LIKELY to be affected by this injury?&#10;A)Elbow flexion, forearm pronation&#10;B)Shoulder flexion, elbow flexion, forearm supination&#10;C)Elbow flexion, forearm supination and pronation&#10;D)Shoulder flexion, elbow flexion, forearm pronation

Accepted Answer

The proximal attachment of the long head of the biceps is at the shoulder joint. Therefore, any movement that involves shoulder flexion will be affected. The long head of the biceps also supinates the forearm, so forearm supination will also be affected. Elbow flexion is also involved, but it is not unique to the long head of the biceps, as other muscles also contribute to this movement. Therefore, choice B, which includes shoulder flexion, elbow flexion, and forearm supination, is the best answer.

Question 5

Which of the following muscles supinates the forearm to a neutral position when it is initially positioned in full pronation?&#10;A)Supinator&#10;B)Biceps brachii&#10;C)Pronator teres&#10;D)Brachioradialis

Accepted Answer

The brachioradialis assists in bringing the forearm to a neutral position from full pronation or supination.

Question 6

What type of stress does the ulnar (medial) collateral ligament counter?&#10;A)Varus&#10;B)Anterior&#10;C)Valgus&#10;D)Posterior

Accepted Answer

The ulnar (medial) collateral ligament counters valgus stress, which forces the joint to move towards the midline of the body.

Question 7

A person sustains a tear to the proximal attachment of the short head of the biceps.Which of the following movements are MOST LIKELY to be affected by this injury?&#10;A)Elbow flexion, forearm pronation&#10;B)Shoulder flexion, elbow flexion, forearm supination&#10;C)Elbow flexion, forearm supination&#10;D)Shoulder flexion, elbow flexion, forearm pronation

Accepted Answer

The short head of the biceps muscle primarily functions in elbow flexion and forearm supination. Therefore, a tear at its proximal attachment would most likely affect the ability to perform these movements. Shoulder flexion is primarily controlled by the deltoid muscle and is not directly affected by a tear to the short head of the biceps. Forearm pronation is primarily controlled by the pronator teres muscle, which is not directly affected by a tear to the short head of the biceps.

Question 8

Which of the following bony sites serves as the proximal attachment for the supinator muscle?&#10;A)Radial head&#10;B)Medial humeral epicondyle&#10;C)Radial styloid process&#10;D)Lateral humeral epicondyle

Accepted Answer

The supinator muscle's proximal attachment is at the lateral humeral epicondyle. This muscle is primarily involved in supination of the forearm.

Question 9

Which of the following structures provides stability to the radial head as it rotates around the ulna?&#10;A)Lateral collateral ligament&#10;B)Quadrate ligament&#10;C)Medial collateral ligament&#10;D)Annular ligament

Accepted Answer

The annular ligament provides stability to the radial head as it rotates around the ulna by forming a ring around the head of the radius and attaching it to the ulna. The other ligaments listed provide stability to the elbow joint but not specifically to the rotation of the radial head.

Question 10

What are the arthrokinematics of the ulnar trochlear notch during open-chain elbow flexion?&#10;A)Rolls anteriorly and glides posteriorly&#10;B)Rolls and glides anteriorly&#10;C)Rolls posteriorly and glides anteriorly&#10;D)Rolls and glides posteriorly

Accepted Answer

During open-chain elbow flexion, the ulnar trochlear notch rolls and glides anteriorly on the trochlea of the humerus.

Question 11

In which of the following elbow positions is the biceps brachii able to generate the greatest supination force?&#10;A)90&#176; of elbow flexion&#10;B)0&#176; of elbow flexion&#10;C)30&#176; of elbow flexion&#10;D)130&#176; of elbow flexion

Accepted Answer

The answer of In which of the following elbow positions...

Question 12

What is the average carrying angle of the elbow?&#10;A)5&#176;&#10;B)10&#176;&#10;C)15&#176;&#10;D)20&#176;

Accepted Answer

The answer of What is the average carrying angle of...

Question 13

What type of stress does the radial (lateral) collateral ligament counter?&#10;A)Varus&#10;B)Anterior&#10;C)Valgus&#10;D)Posterior

Accepted Answer

The answer of What type of stress does the radial...

Question 14

Which of the following joints form the elbow complex?&#10;A)Humeroradial, humeroulnar, and proximal radioulnar joints&#10;B)Humeroradial and humeroulnar joints&#10;C)Humeroradial, humeroulnar, and proximal and distal radioulnar joints&#10;D)Proximal and distal radioulnar joints

Accepted Answer

The answer of Which of the following joints form the...

Question 15

Which of the following elbow flexor muscle attachments can be palpated distally at the radial styloid process?&#10;A)Long head of biceps&#10;B)Brachialis&#10;C)Short head of biceps&#10;D)Brachioradialis

Accepted Answer

The answer of Which of the following elbow flexor muscle...

Question 16

What are the arthrokinematics of the ulnar trochlear notch during open-chain elbow extension?&#10;A)Rolls anteriorly and glides posteriorly&#10;B)Rolls and glides anteriorly&#10;C)Rolls posteriorly and glides anteriorly&#10;D)Rolls and glides posteriorly

Accepted Answer

The answer of What are the arthrokinematics of the ulnar...

Question 17

Which of the following positions of the elbow would allow the biceps brachii to produce its greatest force?&#10;A)Full joint end-range extension&#10;B)Between 0&#176; and 60&#176; of flexion&#10;C)Full joint end-range flexion&#10;D)Between 90&#176; and 100&#176; of flexion

Accepted Answer

The answer of Which of the following positions of the...

Question 18

Which of the following positions of the elbow would allow the brachioradialis muscle to produce its greatest force?&#10;A)Between 0&#176; and 90&#176; of elbow flexion with forearm in 80&#176; of pronation&#10;B)Between 100&#176; and 120&#176; of elbow flexion with forearm in 80&#176; of pronation&#10;C)Between 0&#176; and 90&#176; of elbow flexion with forearm in neutral&#10;D)Between 100&#176; and 120&#176; of elbow flexion with forearm in neutral

Accepted Answer

The answer of Which of the following positions of the...

Question 19

During forearm pronation, which of the following movements occurs?&#10;A)Ulna pivots around radius in sagittal plane around frontal axis&#10;B)Radius pivots around ulna in transverse plane around vertical axis&#10;C)Radius pivots around ulna in sagittal plane around frontal axis&#10;D)Ulna pivots around radius in transverse plane around vertical axis

Accepted Answer

The answer of During forearm pronation, which of the following...

Question 20

With reference to the law of parsimony, which of the following muscles would be activated during a prone push-up requiring maximal force?&#10;A)Short head of the biceps, brachialis&#10;B)Long, medial, and lateral heads of the triceps&#10;C)Medial head of the triceps, anconeus&#10;D)Long and short heads of the biceps

Accepted Answer

The answer of With reference to the law of parsimony,...

Question 21

&#10;What is the function of the triceps as shown in the image as the screwdriver is used to tighten a screw?&#10;A)Supinates the forearm&#10;B)Counters the flexion component of the biceps&#10;C)Pronates the forearm&#10;D)Counters the supination component of the biceps

Accepted Answer

The answer of  &#10;What is the function of the...

Question 22

Which of the following nerves passes through the belly of the pronator teres and can be involved in compression injury?&#10;A)Musculocutaneous&#10;B)Median&#10;C)Ulnar&#10;D)Radial

Accepted Answer

The answer of Which of the following nerves passes through...

Question 23

A person is complaining of tenderness with palpation of the medial humeral epicondyle.Which of the following muscles is MOST LIKELY to be involved?&#10;A)Long head of the biceps&#10;B)Pronator teres&#10;C)Pronator quadratus&#10;D)Supinator

Accepted Answer

The answer of A person is complaining of tenderness with...

Question 24

What does coupling of forearm supination with shoulder lateral rotation accomplish during functional activities?&#10;A)Allows the hand to bring objects to the mouth&#10;B)Allows the arms to assist with pushing up out of a chair&#10;C)Allows the hand to perform tasks throughout 360&#176; arc&#10;D)Allows the arms to reach overhead for objects

Accepted Answer

The answer of What does coupling of forearm supination with...

Deck 9: Structure and Function of the Elbow Complex