PK2

What triangular-shaped muscle is a weak elbow extensor located lateral to the olecranon process?

Anconeus

Which is the origin of the anconeus?

Lateral epicondyle of the humerus

Which is the insertion of the anconeus?

Olecranon process and posterior, proximal surface of the ulna.

Which of the following is an action of the anconeus?

Extend the elbow

Which head of the biceps brachii passes through the intertubercular groove?

Long Head

Which of the following is the primary muscle of supination?

Biceps brachii

Which movement would lengthen the fibers of the biceps brachii?

Pronation of the forearm

As you follow the biceps brachii belly proximally, it becomes deep to which muscle?

Deltoid

Which is the origin of the biceps brachii short head?

Coracoid process of the scapula

Which is the insertion of the biceps brachii?

Tuberosity of radius and aponeurosis of biceps brachii

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

Flex the elbow

What is the thin sheet of fascia extending off the distal tendon of the biceps brachii?

Bicipital aponeurosis

Which is the origin of the brachialis?

Distal half of anterior surface of the humerus

Which is the insertion of the brachialis

Tuberosity and coronoid process of the ulna

Which of the following is an action of the brachialis?

Flex the elbow

Which muscle is a strong elbow flexor located deep to the biceps brachii?

Brachioradialis

What movement will lengthen the fibers of brachialis?

Extension of the wrist

Which muscle creates a helpful dividing line between the flexors and extensors of the wrist and hand?

Brachioradialis

Which movement shortens the fibers of the brachioradialis?

Flexion of the elbow

Which is the origin of the brachioradialis?

Proximal two-thirds of the lateral supracondylar ridge of the humerus.

Which is the insertion of the brachirodialis?

Styloid process of radius

In anatomical position, the coracobrachialis is deep to which two muscles?

Pectoralis major and anterior deltoid

Which movement would lengthen the fibers of the coracobrachialis?

Shoulder abduction

To locate the belly of the coracobrachialis with your partner in a supine position, from which muscle would you slide off and into the axilla?

Pectoralis major

Which is the origin of the coracobrachialis?

Coracoid process of scapula

Which is the insertion of the coracobrachialis?

Medial surface of mid-humeral shaft

Which of the following is an action of the coracobrachialis?

Flex the shoulder

Which muscle’s primary task is extension of the second, or “index” finger?

Extensor indicis

Which is the origin of the extensor indicis?

Posterior surface of distal shaft of ulna and interosseous membrane

Which is the insertion of the extensor indicis?

Tendon of the extensor digitorum at the level of the second metacarpal

Which of the following is an action of the extensor indicis?

Adduct the second finger

Which extensor muscle can be palpated alongside the shaft of the ulna?

Extensor carpi ulnaris

Which movement will lengthen the fibers of the extensor carpi radialis longus and brevis?

Adduction of the wrist

Which is the origin of the extensor carpi radialis longus?

Distal one-third of the lateral supracondylar ridge of the humerus

Which is the insertion of the extensor carpi radialis longus?

Base of second metacarpal

Which is the origin of the extensor carpi radialis brevis?

Common extensor tendon from the lateral epicondyle of the humerus

Which of the following is an action of the extensor carpi radialis brevis?

Assist to flex the elbow

Which is the origin of the extensor carpi ulnaris?

Common extensor tendon from lateral epicondyle of the humerus

Which is the insertion of the extensor carpi ulnaris?

Base of fifth metacarpal

Which of the following is an action of the extensor carpi ulnaris?

Adduct the wrist

Which is the origin of the extensor digitorum?

Common extensor tendon from lateral epicondyle of the humerus

Which is the insertion of the extensor digitorum?

Bases of middle and distal phalanges of 2-5th fingers

Which of the following is an action of the extensor digitorum?

Assist to extend the wrist

The extensor digitorum creates movement at which fingers?

2-5

Which movement lengthens the fibers of extensor digitorum?

Finger flexion

Which movement shortens the fibers of extensor carpi ulnaris?

Wrist adduction

In general, the origin of the extensor group can be found on or near which bony landmark?

Lateral epicondyle

Wiggling your finger, as if typing or playing piano, will create an undulating contraction of which muscle?

Extensor digitorum

Which forearm muscles comprise the “wad of three”?

Extensor carpi radialis, longus and brevis and brachioradialis

Which of the following is an action of the extensor carpi radialis longus?

Abduct the wrist

The common flexor tendon attaches to which bony landmark?

Medial epicondyle of the humerus

What are the three superficial muscles in the flexor group?

Palmaris longus, flexor carpi radialis, and flexor carpi ulnaris

Flexor digitorum superficialis and profundus each have four thin tendons that pass through which sheath of connective tissue?

Carpal tunnel

Which movement will lengthen the fibers of palmaris longus?

Wrist extension

Which is the origin of the flexor carpi radialis?

Common flexor tendon from medial epicondyle of humerus

Which is the insertion of the flexor carpi radialis?

Bases of second and third metacarpals

Which of the following is an action of the flexor carpi radialis?

Abduct the wrist

Which is the origin of the palmaris longus?

Common flexor tendon from medial epicondyle of humerus

Which is the insertion of the palmaris longus?

Flexor retinaculum and palmar aponeurosis

Which of the following is an action of the palmaris longus?

Flex the wrist

Which is the insertion of the flexor carpi ulnaris?

Pisiform, hook of the hamate and base of 5th metacarpal

Which of the following is an action of the flexor carpi ulnaris?

Adduct the wrist

Which of the following is a part of the origin of the flexor digitorum superficialis?

Common flexor tendon from medial epicondyle of humerus

Which is the insertion of the flexor digitorum superficialis?

Sides of middle phalanges of 2-5th fingers

Which of the following is an action of the flexor digitorum superficialis?

Flex the 2-5th fingers

Which is the origin of the flexor digitorum profundus?

Anterior and medial surfaces of proximal three-quarters of ulna

Which of the following is a part of the insertion of the flexor digitorum profundus?

Bases of distal phalanges, palmar surface

Which of the following is an action of the flexor digitorum profundus?

Assist to flex the wrist

Which muscle runs between the pisiform and the medial epicondyle of the humerus?

Flexor carpi ulnaris

Pinching the fingers together highlights which muscle at the wrist?

Palmaris longus

How many muscles act upon the thumb?

8

How many of the muscles of the thumb are located at the thenar eminence?

4

The distal tendons of which muscles from the “anatomical snuffbox”?

Abductor pollicis longus, extensor pollicis longus, and brevis

Which muscles are difficult to access due to their placement deep to the lumbricals and between the metacarpal bones?

Palmar interossei

The lumbricals sprout from the tendons of which muscle?

Flexor digitorum profundus

Which muscle is located between the pisiform and the base of the fifth finger?

Abductor digiti minimi

Which muscle is an antagonist to both the biceps brachii and supinator?

Pronator teres

Palpating medial to the distal tendon of which muscle can help you locate the pronator teres?

Biceps brachii

Which is a portion of the origin of the pronator teres?

Common flexor tendon

Which is the insertion of the pronator teres?

Middle of lateral surface of radius

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

Assist to flex the elbow

Which muscle is a synergist to pronator teres?

Pronator quadratus

Which is the origin of the pronator quadratus?

Medial, anterior surface of distal ulna

Which is the insertion of the pronator quadratus?

Lateral, anterior surface of distal radius

Which of the following is an action of the pronator quadratus?

Pronate the forearm

To access the supinator, you must palpate deep to which muscles?

Forearm extensors

Which is the origin of the supinator?

Lateral epicondyle of humerus, radial collateral ligament, annular ligament and supinator crest of ulna

Which is the insertion of the supinator?

Anterior, lateral surface of proximal one-third of radial shaft

Which of the following is an action of the supinator?

Supinate the forearm

Which of the following is the only muscle of the posterior arm?

Triceps brachii

The long head of the triceps brachii weaves between which two muscles before attaching at the infraglenoid tubercle?

Teres major and minor

Which movement shortens the fibers of the triceps brachii?

Elbow extension

Which is the origin of the triceps brachii’s long head?

Infraglenoid tubercle of the scapula

Which is the insertion of the triceps brachii?

Olecranon process of the ulna

To outline the distal tendon of the triceps brachii, which landmark do you want to locate?

Olecranon process

What resisted action could you ask your partner to perform to feel the contraction of the long head of the triceps brachii?

Shoulder extension

When locating the proximal attachment of the long head of the triceps, you will be palpating deep to which muscle?

Deltoid

What resisted action can you ask your partner to do that will contract the muscles of the hypothenar eminence most prominently?

Abduct the finger

Which is the insertion of the extensor carpi radialis brevis?

Base of third metacarpal