Muscles: Muscles of Forearm anterior compartment, Layers of the anterior forearm

* What are the 8 muscles in the muscles of forearm anterior compartment*?

1. Pronator Teres

2. Flexor Carpii Ulnaris

3. Palmaris Longus

4. Floxor Carpii Radialis

5. Flexor Digitorum Supericialis

6. Flexor Pollicis Longus

7. Flexor Digitorum Profundus

8. Pronator Quadratus

** What is the Origin, Insertion, Innervation, & Action of the PRONATOR TERES?

O: Medial epicondyle/humerus, *coronoid process of ulna*

I: Middle of lateral surface of radius

N: Median N. C5-T1

A: Pronation of forearm

** What is the Origin, Insertion, Innervation, & Action of the FLEXOR CARPII ULNARIS?

O: Humeral head= medial epicondyle

Ulnar head= olecranon & posterior border of ulnar

I: Pisiform, hook of hamate, base of 5th MCP

N: Ulnar N. C8-T1

A: Flex & adduct hand at carpus, flexes forearm

** What is the Origin, Insertion, Innervation, & Action of the PALMARIS LONGUS?

O: Medial epicondyle/humerus

I: Palmer aponeurosis

N: Median N. C5-T1

A: Flex hand & forearm

** What is the Origin, Insertion, Innervation, & Action of the FLEXOR CARPII RADIALIS?

O: Medial epicondyle/humerus

I: Base of 2nd & 3rd MCP

N: Median N. C5-T1

A: Flex & abduct hand, flex forearm

** What is the Origin, Insertion, Innervation, & Action of the FLEXOR DIGITORUM SUPERFICIALIS?

O: Humeral head= medical epicondyle, coronoid process of ulna, ulnar collateral ligament

I: Palmar aspect of middle phalanx of digits 2-5

N. Median N. C5-T1

A: Flexes PIPs, hand & forearm

** What is the Origin, Insertion, Innervation, & Action of the FLEXOR POLLICIS LONGUS?

O: Anterior surface of radius & interosseous membrane

I: Base of distal phalanx of thumb

N: Anterior Interosseous

A: Flexes IP of thumb

*** What is the Origin, Insertion, Innervation, & Action of the FLEXOR DIGITORUM PROFUNDUS?

O: Proximal anterior ulna & interosseous membrane

I: DIPs 2-5

N: *Median (C5-T1) & Ulnar (C8-T1) N.*

A: Flexes DIPs & hand

** What is the Origin, Insertion, Innervation, & Action of the PRONATOR QUADRATUS?

O: Distal aspect of anterior ulnar

I: Distal aspect of anterior radius

N: Anterior Interosseous

A: Pronation of forearm

** How many tendons go through the carpal tunnel?

*9*

-*4 Flex. Digit. Profundus*

-*4 Flex. Digit. Superficialis*

-*1 Flex. Pol. Longus*

What muscles make up the superficial layer of the anterior forearm?

"Point, Flex, Point, Flex"

1. Pronator Teres

2. Flexor Carpii Radialis

3. Palmaris Longus

4. Flexor Carpii Ulnaris

What is the ONLY muscle that makes up the intermediate layer of the anterior forearm?

Flexor Digitorum Superficialis

* What muscles make up the deep layer of the anterior forearm?

1. Flexor Pollicus Longus

2. Flexor Digitorum Profundus

3. Pronator Quadratus

What is lateral to flexor carpii radialis tendon?

Radial pulse

What 2 muscles does the Anterior Interosseous n. Supply?

1. Flexor Pollicus Longus

2. Pronator Quadratus