Kines 2) Forearm & Hand: Muscles

What are the abductors of the thumb?

Abductor pollicis brevis & aductor pollicis longus

What are the adductors & opposition of the thumb?

Adductor pollicis & opponens pollicis

Which muscle is synergist to the triceps brachii in elbow extension?

Anconeus

What is the origin of the brachialis?

Anterior surface of the distal half of the humerus

What muscle is synergist to the supinator in supination of the forearm?

Biceps brachii

Which muscle is synergist to the brachioradialis in elbow flexion?

Biceps brachii & brachialis

Which muscle is synergist to the brachialis in elbow flexion?

Biceps brachii & brachioradialis

What muscle is antagonist to the pronator quadratus in pronation of the forearm?

Biceps brachii & supinator in supination of the forearm

Which muscle is antagonist to the pronator teres in pronation of the forearm?

Biceps brachii & supinator in supinator of the forearm

Which two muscles hold the humerus in place?

Biceps brachii & triceps brachii

Which muscle is antagonist to the anconeus in elbow extension?

Biceps brachii, brachialis & brachioradialis in elbow flexion

Which muscle is antagonist to the triceps brachii in elbow extension?

Bicepsbrachii, brachialis, & brachioradialis

Which muscle is synergist to the biceps brachii in elbow flexion?

Brachialis & brachioradialis

What is the origin of the extensors of the WHD - wrist, hand & digits?

Common extensor tendon from the lateral epicondyle of the humerus

What is the origin of the flexors of the WHD - wrist, hand & digits?

Common flexor tendon from the medial epicondyle of the humerus

What is the origin of the biceps brachii short head?

Coracoid process of the scapula

Which muscle is synergist to the biceps brachii in shoulder flexion?

Deltoid & coracobrachialis

Which muscle is synergist to the biceps brachii in flexion of the shoulder?

Deltoid & coracoidbrachialis

What is the action of the triceps brachii?

Extension of the elbow, extension of the shoulder

What is the action of the extensors of the WHD - wrist, hand & digits?

Extension of the wrist & fingers

What are the extensors of the thumb?

Extensor pollicis brevis & extensor pollici longus

Which muscle is antagonist to the flexors of the WHD - wrist, hand & digits?

Extensors of the WHD - wrist, hand & digits

What is the action of the brachialis?

Flexion of the elbow

What is the action of the biceps brachii?

Flexion of the elbow, supination of the forearm, & assists in shoulder flexion

What is the action of the brachioradialis?

Flexion of the elbow; with hand in neutral position

What is the action of the WHD - wrist, hand & digits?

Flexion of the wrist & fingers

List the five flexors of the WHD - wrist, hand & digits?

Flexor carpi radialis, palmaris longus, flexor carpi unaris, flexor digitorum superficialis & flexor digitorum profundus

What are the flexors of the thumb?

Flexor pollicis brevis & flexor pollicis longus

Which muscle is antagonist to the extensors of the WHD - wrist, hand & digits?

Flexors of the WHD - wrist, hand & digits

What are the groups of muscles of the thumb?

Flexors; extensors; abductors; & adductors & Opposition

Describe the Flexors of the Wrist, Hand & Digits - WHD?

Group of muscles on anterior side of forearm; involved in golfer's elbow / medial epicondylitis

Describe the extensors of wrist, hand & digits - WHD?

Group of muscles on posterior side of forearm; involved in tennis elbow / lateral epicondylitis

What is the origin of the triceps brachii long head?

Infraglenoid tubercle of the scapula

What is the origin of the brachioradialis?

Lateral supracondylar ridge of the humerus - outside edge only

Describe the Supinator?

Located on the posterolateral aspect of the proximal forearm

What are the muscles of the hand?

Lumbricals on the palmar surface & interossei in between bones of metacarpals

Describe the Brachialis?

Most powerful elbow flexor that lies beneath the biceps brachii on anterior arm

What does the opponens pollicis do?

Muscle in thumb which allows us to touch thumb to other fingers; this is called opposition - there's no antagonist

What is the insertion of the triceps brachii?

Olecranon process of the ulna - point of elbow

Describe brachioradialis?

On lateral side of forearm, runs from distal humerus to distal radius; only muscle to run length of forearm

Describe the Pronator Teres?

Powerful pronator of the forearm located on the anterior aspect of the proximal forearm

What muscle is synergist to the pronator teres in pronation of the forearm?

Pronator quadratus

What muscle is synergist to the pronator quadratus in pronation of the forearm?

Pronator teres

Which muscle is antagonist to the biceps brachii in supination of the forearm?

Pronator teres & prnator quadratus in pronator of the forearm

What muscle is antagonist to the supinator in supination of the forearm?

Pronator teres & pronator quadratus in pronation of the forearm

What is the insertion of the biceps brachii?

Radial tuberosity of the radius & the bicipital aponeurosis

What is the insertion of the brachioradialis?

Styloid process of the radius

Which muscle is synergist to the biceps brachii in supination of the forearm?

Supinator

What is the origin of the biceps brachii long head?

Supraglenoid tubercle of the scapula

Describe the Triceps Brachii?

Three headed muscle on posterior arm

Which muscle is synergist to the anconeus in elbow extension?

Triceps brachii

Which muscle is antagonist to the brachialis in elbow flexion?

Triceps brachii & anconeus in elbow extension

Which muscle is antagonist to the brachioradialis in elbow flexion?

Triceps brachii & anconeus in elbow extension

Which muscle is antagonist to the biceps brachii in flexion of the elbow?

Triceps brachii & anconeus in extension of the elbow

What is the insertion of the brachialis?

Tuberosity & coracoid process of the ulna

Describe the Biceps Brachii?

Two head muscle on anterior / front arm

What is the insertion of the extensors of the WHD - wrist, hand & digits?

Various metacarpal & phalangeal attachments

What is the insertion of the flexors of the WHD - wrist, hand & digits?

Various metacarpal & phalangeal attachments

Describe the Anconeus?

Weak elbow extensor

Describe the Pronator Quadratus?

Weaker pronator of the forearm located on the deep anterior aspect of the distal forearm

List the five extensors of the WHD - wrist, hand & digits?

extensor carpi radialis longus, extensor carpi radialis brevis, extensor carpi ulnaris, extensor digitorum, extensor indicus

What is the origin of the triceps brachii medial / deep head?

posterior surface of the distal half of the humerus

What is the origin of the triceps brachii lateral head:

posterior surface of the proximal half of the humerus