HS&F Ch. 6

An agonist to the supinator muscle is the ________.

Biceps brachialis

while in the anatomical position the radius is medial with respect to the ulna

false

The ulna is much larger proximally than the radius.

true

When performing a pushup the biceps brachii is considered to be an antagonist muscle.

true

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

Flexion of the elbow

The ligaments of the elbow include all of the following except?

Interosseus

Actions of the biceps brachii include all of the following except?

Pronation of the forearm

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

false

The pronator teres is innervated by the median nerve.

true

Muscles that primarily flex the elbow and pronate the forearm include all of the following except?

Anconeus

The muscles that perform radioulnar supination include all of the following except?

Anconeus

When viewed from the anatomical position which of the following is located posterior surface of the arm?

Anconeus

Tightening a screw with a screwdriver using the right hand depends significantly upon the action of the _____.

Biceps brachialis

Muscles that primarily extend the elbow and supinate the forearm include all of the following except?

Brachialis

Radioulnar supinators include all of the following except?

Brachialis

The muscles that perform radioulnar pronation include all of the following except?

Brachialis

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

Brachioradialis

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

Extension of the elbow

Actions of the elbow and radioulnar joints occur in all of the following planes except?

Frontal

Which of the following is the origin of the supinator muscle?

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

Which of the following is the insertion of the pronator teres muscle?

Middle 1/3 of the lateral surface of the radius

Which of the following muscles does not act in flexion of the elbow?

Pronator quadratus

The radial nerve innervates all of the following muscles except?

Pronator teres

When viewed from the anatomical position which of the following is located anterior surface of the arm?

Pronator teres

Flexion of the elbow and supination of the forearm occur about the _____ and ____ axes, respectively.

Sagittal, longitudinal

The origin of the triceps muscle includes all of the following except?

Supraglenoid tubercle above the superior lip of the glenoid fossa of the scapula

The most commonly injured ligament in the elbow due to throwing is the ______.

Ulnar collateral ligament

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

Weak flexion of the elbow

Actions of the brachioradialis muscle include all of the following except?

Weak flexion of the shoulder

Movement at the elbow by the forearm away from the shoulder is accurately described by the term "flexion".

false

Supination refers to internal rotary movements of the radius on the ulna

false

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

false

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

false

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

false

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

false

The radial head sits inside of the capitulum and is held in place by the annular ligament.

false

lateral epicondylitis is a condition that occurs less commonly than medial epicondylitis

false

the elbow joint is a hinge-type joint that allows for internal and external rotation

false

Bony stability of the elbow in full extension is enhanced by the olecranon process fitting into the olecranon fossa.

true

Medial epicondylitis is also known as golfer's elbow.

true

Motion of the elbow primarily involves movement between articular surfaces of the humerus and ulna.

true

Normal bony limitation of elbow flexion is limited by the coranoid process fitting into the coranoid fossa.

true

Positioning the forearm in pronation reduces the effectiveness of the biceps brachialis in flexing the elbow.

true

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

true

The insertion of the biceps brachii muscle is the radial tuberosity.

true

The insertion of the triceps brachii muscle is the olecranon process of the ulna.

true

The origin of the biceps brachii muscle includes the supraglenoid tubercle above the superior lip of the glenoid fossa.

true

The radial collateral ligament provides lateral stability to the elbow and is rarely injured.

true

When the arm is held in the anatomical position the radial tuberosity is in close proximity to lateral side of the ulna.

true

All of the following are bony landmarks located on the humerus except?

Olecranon fossa