Posterior Forearm

Question 1

Brachioradialis (superficial)

Answer 1

O: Lateral supraepicondylar ridge
I: Distal radius
A: Flex @ elbow
V: Radial

Question 2

Extensor carpi radialis longus and brevis (superficial)

Answer 2

O: (ECRL) supracondylar ridge, (ECRB) lateral epicondyle
I: Metacarpal II-III
A: Ext/ABduct @ wrist
V: Radial

Question 3

Extensor digitorum (superficial)

Answer 3

O: Lateral epicondyle
I: Extensor hood of each digit
A: Ext digits @ MCP/PIP/DIP
V: Radial

Question 4

Extensor digiti minimi (superficial)

Answer 4

O: Lateral epicondyle
I: Extensor hood of digit V
A: Ext digit V @ MCP/PIP/DIP, ext @ wrist
V: Radial

Question 5

Extensor carpi ulnaris (superficial)

Answer 5

O: Lateral epicondyle
I: Base of metacarpal V
A: Ext/ADduct @ wrist
V: Radial

Question 6

Aconeous (superficial)

Answer 6

O: Lateral epicondyle
I: Lateral olecranon
A: Pronate forearm, ext @ elbow
V: Radial

Question 7

Supinator (two heads) (deep)

Answer 7

O: Lateral epicondyle and posterior ulna
I: Posterior radius
A: Supinate forearm
V: Radial

Question 8

Abductor pollicus longus (deep)

Answer 8

O: Interosseous membrane
I: Lateral side of base of metacarpal I
A: ABduct thumb
V: Radial

Question 9

Extensor pollicus brevis (deep)

Answer 9

O: Posterior radius
I: Base of proximal phalanx of thumb
A: Ext MCP/CMC of thumb
V: Radial

Question 10

Extensor pollicus longus (deep)

Answer 10

O: Posterior ulna
I: Distal phalanx of thumb
A: Ext thumb @ CMC/MCP/IP
V: Radial

Question 11

Extensor indicis

Answer 11

O: Posterior ulna
I: Extensor hood of digit II
A: Extend index finger
V: Radial nerve

Question 12

Muscles innervated by radial nerve (BEA|STAE) (like the “Beastae” Boys)

Answer 12

(Lateral to medial - superficial)
B: Brachioradialis
E: Extensors (superficial)
A: Aconeous
(Lateral to medial - deep)
S: Supinator
T: Triceps brachii (this is in the arm, not forearm, just here to make the mnemonic better)
A: Abductor pollicus longus
E: Extensors (deep)

Question 13

Remembering the extensors (RDMU|PI - Really Dumb Mnemonics Useful | People Insist)

Answer 13

(Lateral to medial - superficial)
R: Extensor carpi Radialis (longus and brevis)
D: Extensor Digitorum
M: Extensor digiti Minimi
U: Extensor carpi Ulnaris
(Lateral to medial - deep)
P: Extensor Pollicus (brevis and longis)
I: Extensor Indicis