Origins and Insertions: Flashcards for Theater Study

All muscles of the Anterior Compartment EXCEPT 2 MUSCLES are all innervated by the

Median Nerve

What are the two muscles in the anterior compartment that are innervated by the ulnar nerve?

-Flexor Carpi Ulnaris

-Flexor Digitorum Profundus (ulnar and median nerve)

What are the muscles in the anterior compartment (superficial)?

-Pronator teres

-Flexor carpi radialis

-Palmaris longus

-Flexor carpi ulnaris

What is the origin of Pronator Teres?

Humeral head: medial epicondyle of the humerus.

Ulnar head: coronoid process.

What is the insertion of Pronator Teres?

Lateral Radius

What is the origin of Flexor Carpi Radialis?

Medial epicondyle of humerus

What is the insertion of Flexor Carpi Radialis?

Base of 2nd metacarpal

What is the origin point of Palmaris Longus?

Medial epicondyle of humerus

What is the insertion point of Palmaris Longus?

Palmar Aponeurosis

What is the origin of Flexor carpi ulnaris?

Humeral head: medial epicondyle

Ulnar Head: olecranon

What is the insertion of Flexor Carpi Ulnaris?

-Pisiform, hook of hamate, base of 5th metacarpal

What muscle is anterior compartment intermediate?

Flexor digitorum superficialis

What is the origin of Flexor Digitorum Superficialis?

Humeral head: medial epicondyle.

Ulnar head: coronoid process.

What is the insertion of Flexor Digitorum Superficialis?

Sides of middle phalanges of 2nd to 5th digits.

What muscles are in Anterior Compartment Deep?

-Flexor digitorum profundus

-Flexor pollicis longus

-Pronator quadratus

What is the origin of Flexor Digitorum Profundus?

Ulna and interosseous membrane

What is the insertion of Flexor Digitorum Profundus?

Distal phalanges of 2nd to 5th digits

What is the origin of Flexor Pollicis Longus?

Radius and adjacent

What is the insertion of Flexor Pollicis Longus?

Distal phalanx of thumb

What is the origin of Pronator Quadratus?

Distal quarter of ulna

What is the insertion of pronator Quadratus?

Distal quarter of radius

All the posterior compartment muscles are innervated by what nerve?

Radial N.

What are the posterior compartment muscles (superficialis)?

-Extensor digitorum

-Extensor digiti minimi

-Extensor carpi ulnaris

What is the origin of Extensor Digitorum?

Common head (lateral epicondyle of humerus)

What is the Insertion of Extensor Digitorum?

Dorsal digital expansion of 2nd to 5th digits

What is the origin of Extensor Digiti minimi?

Common head (lateral epicondyle of humerus)

What is the insertion of Extensor Digiti Minimi?

Dorsal digital expansion of 5th digit

What is the origin of Extensor Carpi Ulnaris?

-Common head (lateral epicondyle of humerus) -Ulnar head (dorsal surface)

What is the insertion of Extensor Carpi Ulnaris?

Base of 5th metacarpal

What are the posterior compartment muscles (deep)?

-Supinator

-Abductor pollicis longus

-Extensor pollicis brevis

-Extensor pollicis longus

-Extensor indicis

What is the origin of the Supinator?

Olecranon, lateral epicondyle of humerus, radial collateral ligament, annular ligament of radius.

What is the insertion of the Supinator?

Radius (between radial tuberosity and insertion of pronator teres)

What is the origin of the abductor pollicis longus?

Radius and ulna

What is the insertion of the abductor pollicis longus?

base of 1st metacarpal

What is the origin of the extensor pollicis brevis?

Radius and interosseous membrane

What is the insertion of the extensor pollicis brevis?

Base of proximal phalanx of thumb

What is the origin of the extensor pollicis longus?

Ulna and interosseous membrane

What is the insertion of the extensor pollicis longus?

Base of distal phalanx of thumb

What is the origin of the extensor indicis?

Ulna and interosseous membrane

What is the insertion of the extensor indicis?

Posterior digital extension of 2nd digit

What are the muscles in the radialis group?

-Brachioradialis

-Extensor carpi radialis longus

-Extensor carpi radialis brevis

What is the origin of the brachioradialis?

Distal humerus

What is the insertion of the brachioradilis?

Radial styloid process

What is the origin of the extensor carpi radialis longus?

Lateral supracondylar ridge of distal humerus

What is the insertion of the extensor carpi radialis longus?

2nd metacarpal base

What is the origin of the extensor carpi radialis brevis?

Lateral epicondyle of humerus

What is the insertion of the extensor carpi radialis brevis?

3rd metacarpal base