Muscles Of The Forearm, Anterior Compartment

Front 1

1st layer

Back 1

M. pronator teres

M. flexor carpi radialis

M. palmaris longus

M. flexor carpi ulnaris

Front 2

M. pronator teres

Back 2

Origo:

Epicondylus medialis humeri, proc. coronoideus ulnae

Insertio:

Epiphysis distalis antebrachii, margo lateralis radii

Functio:

Flexio antebrachii, pronatio antebrachii

Front 3

M. flexor carpi radialis

Back 3

Origo:

Epicondylus medialis humeri, fascia antebrachii

Insertio:

Basis ossis metacarpalis IIet III

Functio:

Flexio manus, abductio manus.

Front 4

M. palmaris longus

Back 4

Origo:

Epicondylus medialis humeri

Insertio:

Aponeurosis palmaris

Functio:

Flexio manus

Front 5

M. flexor carpi ulnaris

Back 5

Origo:

Epicondylus medialis humeri, olecranon, margo posterior ulnae

Insertio:

Os pisiforme, os hamatum, os metacarpale V

Functio:

Flexio manus, adductio manus.

Front 6

2nd layer

Back 6

M. flexor digitorum superficialis

Front 7

M. flexor digitorum superficialis

Back 7

Origo:

Epicondylus medialis humeri

Insertio:

Basis phalangis mediae(II - V fingers)

Functio:

Flexio phalangis mediae, flexio phalangis proximalis, flexio manus.

Front 8

3rd layer

Back 8

M. flexor digitorum profundus

M. flexor pollicis longus

Front 9

M. flexor digitorum profundus

Back 9

Origo:

Epiphysis proximalis antebrachii, membrana interossea, facies anterior

Insertio:

Basis phalangis distalis(II - V fingers)

Functio:

Flexio phalangis distalis, flexio phalangis mediae, flexio phalangis proximalis, flexio manus.

Front 10

M. flexor pollicis longus

Back 10

Origo:

Epiphysis proximalis antebrachii,, membrana interossea, facies anterior

Insertio:

Basis phalangis distalis pollicis

Functio:

Flexio phalangis distalis et proximalis pollicis, flexio pollicis.Flexio manus.

Front 11

4th layer

M. Pronator Quadratus

Back 11

Origo:

Ulna, Epiphysis distalis antebrachii,, Facies anterior

Insertio:

Facies anterior radii

Functio:

Pronatio antebrachii

Front 12

Fascia antebrachii

Back 12

Retinaculum musculorum flexorum

Retinaculum musculorum extensorum

Front 13

Retinaculum musculorum flexorum

Back 13

Strong ligament that arches over carpus forming a channel for tendons for digits and the median nerve pass.

Attaches medially to:

Os pisiforme

Os Hamatum

Attaches laterally to:

Os scaphoideum

Os trapezium

Contains:

Canalis Ulnaris

Canalis Carpi

Front 14

Canalis carpi content:

Back 14

n. medianus, 9 tendons, 2 synovial sheaths.

m. flexor digitorum superficialis (4 tendons)

m. flexor digitorum profundus (4 tendons)

m. flexor pollicis longus

Front 15

Canalis ulnaris content:

Back 15

n. ulnaris, a. ulnaris, 2 vv. ulnares.

Front 16

Retinaculum musculorum extensor

Back 16

Strong ligament extending obliquely medially over the dorsal side of the wrist.

Attaches medially to:

Os triqoetrum

Os pisiforme

Attaches laterally to;

Lateral margin of radius

Contains:

6 osteofibrous canals

Front 17

1st canal:

Back 17

1) m. abductor pollicis longus,

2) m. extensor pollicis brevis

Front 18

2nd canal:

Back 18

1) m. extensor carpi radialis longus,

2) m. extensor carpi radialis brevis,

Front 19

3rd canal:

Back 19

m. extensor pollicis longus,

Front 20

4th canal:

Back 20

1) m. extensor digitorum,

2) m. extensor indicis,

Front 21

5th canal:

Back 21

m. extensor digiti minimi,

Front 22

6th canal

Back 22

m. extensor carpi ulnaris.