The Wrist & Hand Complex - Muscles & Tendons

How many Supinator muscles are there?

One

Name the Supinator muscle.

• Supinator

What is the origin of Supinator?

Lateral Epicondyle of the Humerus

What is the insertion of Supinator?

Upper third of posterior Radius

What is the action of Supinator?

Radioulnar Supination (the Transverse plane)

What is the antagonist of Supinator?

The forearm pronators

What is the nerve supply of Supinator?

The Radial nerve

How many Pronator muscles are there?

One

Name the Pronator muscle.

• Pronator Teres

What is the origin of Pronator Teres?

Coronoid Process, Medial Epicondyle of the Humerus

What is the insertion of Pronator Teres?

Middle third of the lateral Radius

What is the action of Pronator Teres?

Radioulnar Pronation (the Transverse plane)

What is the nerve supply of Pronator Teres?

The Median nerve

How many Wrist Flexor muscles are there?

Two

Name the Wrist Flexor muscles.

• Flexor Carpi Radialis

• Flexor Carpi Ulnaris

What is the origin of Flexor Carpi Radialis?

Medial Epicondyle of the Humerus

What is the insertion of Flexor Carpi Radialis?

Palmer surface of the Base of the Second and Third Metacarpals

What is the action of Flexor Carpi Radialis?

Radiocarpal Flexion (the Sagittal plane)

Radiocarpal Radial Deviation (the Frontal plane)

What is the antagonist of Flexor Carpi Radialis?

The wrist extensors, ulna deviators

What is the nerve supply of Flexor Carpi Radialis?

The Median nerve

What is the origin of Flexor Carpi Ulnaris?

Medial Epicondyle of the Humerus, Olecranon

What is the insertion of Flexor Carpi Ulnaris?

Pisiform, hook of Hamate, palmar surface of the Base of the Fifth Metacarpal

What is the action of Flexor Carpi Ulnaris?

Radiocarpal Flexion (the Sagittal plane)

Radiocarpal Ulna Deviation (the Frontal plane)

What is the antagonist of Flexor Carpi Ulnaris?

The wrist extensors, radial deviators

What is the nerve supply of Flexor Carpi Ulnaris?

The Ulna nerve

How many Wrist Extensor muscles are there?

Three

Name the Wrist Extensor muscles.

• Extensor Carpi Radialis Longus

• Extensor Carpi Radialis Brevis

• Extensor Carpi Ulnaris

What is the origin of Extensor Carpi Radialis Longus?

Lateral Epicondyle of the Humerus

What is the insertion of Flexor Carpi Radialis Longus?

Dorsal surface of the Base of the Second Metacarpal

What is the action of Extensor Carpi Radialis Longus?

Radiocarpal Extension (the Sagittal plane)

Radiocarpal Radial Deviation (the Frontal plane)

What is the antagonist of Extensor Carpi Radialis Longus?

The wrist flexors, ulnar deviators

What is the nerve supply of Extensor Carpi Radialis Longus?

The Radial nerve

What is the origin of Extensor Carpi Radialis Brevis?

Lateral Epicondyle of the Humerus

What is the insertion of Extensor Carpi Radialis Brevis?

Dorsal surface of the Base of the Third Metacarpal

What is the action of Extensor Carpi Radialis Brevis?

Radiocarpal Extension (the Sagittal plane)

Radiocarpal Radial Deviation (the Frontal plane)

What is the antagonist of Extensor Carpi Radialis Brevis?

The wrist flexors, ulnar deviators

What is the nerve supply of Extensor Carpi Radialis Brevis?

The Radial nerve

What is the origin of Extensor Carpi Ulnaris?

Lateral Epicondyle of the Humerus, Olecranon

What is the insertion of Extensor Carpi Ulnaris?

Dorsal surface of the Base of the Fifth Metacarpal

What is the action of Extensor Carpi Ulnaris?

Radiocarpal Extension (the Sagittal plane)

Radiocarpal Ulnar Deviation (the Frontal plane)

What is the antagonist of Extensor Carpi Ulnaris?

The wrist flexors, radial deviators

What is the nerve supply of Extensor Carpi Ulnaris?

The Radial nerve

How many Finger Extensor muscles are there?

Three

Name the Finger Extensor muscles.

• Extensor Digiti Minimi

• Extensor Digitorum Communis

• Extensor Indicis

What is the origin of Extensor Digiti Minimi?

Lateral Epicondyle of the Humerus

What is the insertion of Extensor Digiti Minimi?

Dorsal surface of the Base of the proximal Phalange of the Fifth Digit

What is the action of Extensor Digiti Minimi?

Fifth Digit Extension

What is the antagonist of Extensor Digiti Minimi?

Fifth digit flexors

What is the nerve supply of Extensor Digiti Minimi?

The Radial nerve

What is the origin of Extensor Digitorum Communis?

Lateral Epicondyle of the Humerus

What is the insertion of Extensor Digitorum Communis?

Dorsal surface of the middle and distal Phalange of the Second-Fifth Digits

What is the action of Extensor Digitorum Communis?

Second-Fifth Digit Extension (the Sagittal plane)

What is the antagonist of Extensor Digitorum Communis?

Second-fifth digit flexors

What is the nerve supply of Extensor Digitorum Communis?

The Radial nerve

What is the origin of Extensor Indicis?

Lower third of posterior Ulna

What is the insertion of Extensor Indicis?

Dorsal surface of the Base of the proximal Phalange of the Second Digit

What is the action of Extensor Indicis?

Second Digit Extension

What is the antagonist of Extensor Indicis?

Second digit flexors

What is the nerve supply of Extensor Indicis?

The Radial nerve

How many Finger Flexor muscles are there?

Two

Name the Finger Flexor muscles.

• Flexor Digitorum Superficialis

• Flexor Digitorum Profundus

What is the origin of Flexor Digitorum Superficialis?

Medial Epicondyle of the Humerus

What is the insertion of Flexor Digitorum Superficialis?

Palmar surface of the middle Phalange of the Second-Fifth Digits

What is the action of Flexor Digitorum Superficialis?

Second-Fifth Digit Flexion from the Proximal Interphalangeal joint (the Sagittal plane)

What is the antagonist of Flexor Digitorum Superficialis?

The finger extensors

What is the nerve supply of Flexor Digitorum Superficialis?

The Ulna nerve

What is the origin of Flexor Digitorum Profundus?

Upper half of anterior Ulna

What is the insertion of Flexor Digitorum Profundus?

Palmar surface of the distal Phalange of the Second-Fifth Digits

What is the action of Flexor Digitorum Profundus?

Second-Fifth Digit Extension from the Distal Interphalangeal joint (the Sagittal plane)

What is the antagonist of Flexor Digitorum Profundus?

The finger extensors

What is the nerve supply of Flexor Digitorum Profundus?

The Ulna nerve