kinesiology chapter 6

Which of the following is an action of the biceps brachii muscle?

Horizontal adduction of the shoulder joint

Which of the following statements is true about the carrying angle?

It permits the forearms to clear the hips in the swinging movements during walking.

Which of the following is a posterior upper extremity muscle?

The anconeus muscle

Which of the following muscles is involved in both pronation and supination?

The brachioradialis muscle

Which of the following muscles is best stretched by using a partner to grasp the wrist and passively take the forearm into extreme supination?

The pronator quadratus muscle

Which of the following is an action of the pronator teres muscle?

Weak flexion of the elbow

Radioulnar supination is performed by all of the following muscles except the:

anconeus muscle.

Radioulnar pronation is performed by all of the following muscles except the:

brachialis muscle.

The ______ is involved both in pronation and supination of the radioulnar joint.

brachioradialis

The triceps brachii is the prime mover in elbow _____ against resistance.

extension

Which of the following is not an action of the brachioradialis muscle?

extension of the elbow

The insertion of the brachialis muscle is on the coracoid process of the ulna.

false

The insertion of the brachioradialis muscle is on the proximal end of the radius at the styloid process.

false

The long head of the triceps brachii muscle originates from the:

infraglenoid tubercle below the inferior lip of the glenoid fossa of the scapula.

The elbow includes all of the following ligaments except the:

interosseus ligament.

In the anatomic position, the radius lies _____ to the ulna.

lateral

The supinator muscle originates from the:

lateral epicondyle of the humerus and neighboring posterior part of the ulna

The _____ muscle does not perform flexion of the elbow.

pronator quadratus

The anterior interosseous nerve branching from the median nerve (C6, C7) innervates the _____.

pronator quadratus muscle

An example of elbow joint flexion against resistance occurs in the:

pull-up

In the context of radioulnar joint movements, which of the following terms refers to the external rotary movement of the radius on the ulna that results in the hand moving from the palm-down to the palm-up position?

supination

The radial nerve innervates all of the following muscles except:

the pronator teres muscle.

Flexion of the forearm with a barbell in the hands, known as "curling," is an excellent exercise to develop the biceps brachii muscle.

true

In the anatomical position, the tuberosity of the radius is in close proximity to the lateral side of the ulna.

true

Positioning the forearm in pronation decreases the effectiveness of the biceps brachii muscle.

true

The pronator teres muscle is innervated by the median nerve (C6, C7).

true

The pronator teres muscle originates from the distal part of the medial supracondylar ridge of the humerus and the medial side of the proximal ulna.

true

The triceps brachii muscle inserts on the olecranon process of the ulna.

true

The ulna is much larger proximally than the radius.

true

The actions of the brachioradialis muscle include all of the following except:

weak flexion of the shoulder joint.

The olecranon process is located on the medial aspect of the ulna.

false

Which of the following is the sole action of the brachialis muscle?

true flexion of the elbow

Medial epicondylitis is frequently referred to as "golfer's elbow."

true

Which of the following is an anterior upper extremity muscle?

The pronator teres muscle

The chief function of the _____ is to pull the synovial membrane of the elbow joint out of the way of the advancing olecranon process during extension of the elbow.

anconeus muscle

The two fossa of the distal humerus are the:

coronoid and olecranon

A movement of the forearm away from the shoulder is best described by the term "flexion."

false

In the anatomical position, the radius is medial with respect to the ulna.

false

Lateral epicondylitis is a condition that occurs less commonly than medial epicondylitis.

false

Supination refers to an internal rotary movement of the radius on the ulna.

false

The elbow joint is a hinge-type joint that allows only internal and external rotations.

false

The head of the radius has a large amount of contact with the capitulum of the humerus at the radiocapitellar joint.

false

The lateral supracondylar ridge is an anatomical landmark located on the ulna.

false

The scapula and the clavicle serve as proximal attachments for the muscles that flex and extend the elbow.

false

To best palpate the biceps brachii you would position the elbow in ____ and ____ against resistance.

flexion, supination

The pronator teres muscle inserts on the:

middle third of the lateral surface of the radius.

To best palpate the brachioradialis you would position the forearm in ____ and the elbow in ____ against resistance.

neutral, flexion

Flexion of the elbow occurs in the _____ plane of motion, and supination of the forearm occurs in the _____ plane of motion.

saggital, transverse

The posterior interosseous nerve branching from the radial nerve (C6) innervates the _____.

supinator muscle

As the elbow reaches full extension, the olecranon process of the ulna is received by the olecranon fossa of the humerus, and this provides increased joint stability.

true

Elbow motions primarily involve movement between the articular surfaces of the humerus and the ulna.

true

The biceps brachii muscle originates from the supraglenoid tubercle above the superior lip of the glenoid fossa.

true

The distal attachments of the radioulnar joint muscles are located on the radius.

true

The insertion of the biceps brachii muscle is on the tuberosity of the radius and bicipital aponeurosis.

true

The ulnar collateral ligament is critical to providing medial support to prevent the elbow from abducting when stressed in physical activity.

true