Muscles Of The Posterior Arm

Front 1

BRACHIORADIALIS

Insertions

Back 1

P) Proximal 2/3 of the lateral supracondylar ridge of humerus

D) Lateral surface of radius proximal to styloid process

Front 2

BRACHIORADIALIS

Innervations

Back 2

Radial Nerve C5, C6

Front 3

BRACHIORADIALIS

Actions

Back 3

ELBOW: Flexion (weak)

Forearm: Semipronation

Prof "Handshake Position" Semi pronation and Semisupination into neutral position

Front 4

EXTENSOR CARPI RADIALIS LONGUS

Insertions

Back 4

P) Lateral Supracondylar ridge of the Humerus

d) Dorsal aspect of the base of the 2nd metacarpal

Front 5

EXTENSOR CARPI RADIALIS LONGUS

Innervation

Back 5

Radial Nerve C6, C7

Front 6

EXTENSOR CARPI RADIALIS LONGUS

Actions

Back 6

ELBOW: Flexion (Weak)

WRIST:
1) Extension
2) ABduction

Front 7

EXTENSOR CARPI RADIALIS BREVIS

Insertions

Back 7

P) Lateral Supracondylar of the humerus

D) Dorsal aspect of the base of the third metacarpal

Front 8

EXTENSOR CARPI RADIALIS BREVIS

Innervations

Back 8

Radial Nerve C7-C8

Front 9

EXTENSOR CARPI RADIALIS BREVIS

Actions

Back 9

ELBOW: Weak Flexor

WRIST:
1) Extension and Abduction

Front 10

ABductors of the WRIST

Back 10

FLEXORS

1) Flexor Carpi Radialis (MN C6-C7)
2) Flexor Pollicis Longus (MN C7-C8)

EXTENSORS

3) Extensor Carpi Radialis Longus (RN:C6, C7)
4) Extensor Carpi Radialis Brevis (RN: C7, C8)
5) Extensor Digit Minimi (RN C7, C8)
6) Abductor Pollicis Longus (RN: C7, C8)

Front 11

What does this pattern refer to?

LONGUS
BREVIS
LONGUS
BREVIS
LONGUS
INDICIS

Back 11

LONGUS - Extensor Carpi Radialis LONGUS (RN: C6, C7)

BREVIS - Extensor Carpi Radialis BREVIS (RN: C7, C8)

LONGUS - Abductor Pollicis LONGUS (RN: C7-C8)

BREVIS - Extensor Pollicis BREVIS (RN: C7, C8)

LONGUS - Extensor Pollicis LONGUS ( RN: C7, C8)

INDICIS- Extensor INDICIS (RN: C7, C8)

Front 12

EXTENSOR DIGITORUM

Insertion

Back 12

P) Lateral Head of the Humerus (Common Extensor Origin)

D) Dorsal Digital Expansion of 2nd - 5th digits

Front 13

EXTENSOR DIGITORUM

Innervation

Back 13

Radial Nerve C7-C8

Front 14

EXTENSOR DIGITORUM

Action

Back 14

WRIST: Extension

MCP, PIP, DIP of 2nd - 5th digits:
1) Extension
2) ABduction

Front 15

EXTENSOR DIGITI MINIMI

Insertions

Back 15

P) Lateral Epicondyle of the humerus (Common extensor head)

D) Dorsal Digital Expansion of the 5th digit

Front 16

EXTENSOR DIGITI MINIMI

Innervation

Back 16

Radial Nerve

C7, C8

Front 17

EXTENSOR DIGITI MINIMI

Actions

Back 17

WRIST: Extension

MCP, PIP, DIP of 5th Digit: Extension

Front 18

EXTENSOR CARPI ULNARIS

Insertions

Back 18

P)
1) Lateral epicondyle of the humerus (common extensor head)
2) Dorsal aspect of the Ulnar head via a shared aponeurosis

D) Base of the 5th Metacarpal

Front 19

EXTENSOR CARPI ULNARIS

Innervations

Back 19

Radial Nerve C7, C8

Front 20

EXTENSOR CARPI ULNARIS

Actions

Back 20

WRIST

1) Extension
2) AD duction

Front 21

SUPINATOR

Insertions

Back 21

PROXIMAL
1) Olecranon
2) Lateral epicondyle of the humerus
3) Ligamnets
a) Annular
b) Radial Collateral

Front 22

SUPINATOR

Innervation

Back 22

Radial Nerve C6-C7

Front 23

SUPINATOR

Actions

Back 23

Radioulnar Joints - Supinations

Front 24

ABDUCTOR POLLICIS LONGUS

Insertions

Back 24

P) Radius and Ulna (dorsal surfaces, interosseous membrane)

D) Base of the 1st Metacarpal

Front 25

ABDUCTOR POLLICIS LONGUS

Innervations

Back 25

Radial Nerve C7-C8

Front 26

ABDUCTOR POLLICIS LONGUS

Actions

Back 26

1) Radiocarpal Joint ABduction of the hand

2) Carpometacarpal joint of the thumb: ABduction

Front 27

EXTENSOR POLLICIS BREVIS

Insertions

Back 27

PROXIMAL
1) Radius (Posterior Surface)
2) Interosseous Membrane

DISTAL
Base of the proximal phalanx of the thumb

Front 28

EXTENSOR POLLICIS BREVIS

Innervation

Back 28

Radial Nerve C7-C8

Front 29

EXTENSOR POLLICIS BREVIS

Actions

Back 29

1) Radiocarpal Joint: AB duction

2) Carpometacarpal and MCP Joint of the thumb: Extension

Front 30

EXTENSOR POLLICIS LONGUS

Insertions

Back 30

PROXIMAL

1) Ulna (posterior surface)
2) Interosseous Membrane

DISTAL
Base of the distal phalanx of the thumb

Front 31

EXTENSOR POLLICIS LONGUS

Innervation

Back 31

Radial Nerve C7, C8

Front 32

EXTENSOR POLLICIS LONGUS

Actions

Back 32

WRIST
1) Extension
2) Abduction

CARPOMETACARPAL OF THE THUMB
AD duction

MCP and IP of Thumb: Extension

Front 33

EXTENSOR INDICIS

Insertion

Back 33

PROXIMAL
1) Ulna (posterior surface)
2) Interosseous Membrane

DISTAL
Extensor expansion of 2nd digit

Front 34

EXTENSOR INDICIS

Innervation

Back 34

Radial Nerve C7-C8

Front 35

EXTENSOR INDICIS

Actions

Back 35

WRIST: Extension

MCP, PIP, DIP, of 2nd Digit: Extension