Posterior forearm

Question 1

In the post. forearm which muscles act upon the wrist?

Answer 1

ECRL (Base 2nd MC) ECRB (Base 3rd MC) ECU (Base of 5th MC)

Question 2

In the post. forearm which muscles act upon the thumb?

Answer 2

APL (1st MC) EPB (Base prox. ph) EPL (Base dist. ph) First two are outcropping muscles

Question 3

In the post. forearm which muscles act upon the digits?

Answer 3

ED EI EDM All attach onto the dorsal digitial expansion hood (DDEH)

Question 4

In the post. forearm which muscles act upon the forearm only…

Answer 4

Aconeus (extends elbow) BR (Flex elbow) Supinator

Question 5

Describe the nerve supply of the post. forearm;

Answer 5

All extensor compartment muscles are supplied by the radial nerves deep interosseus branch, except BR and ECRL. Sup. branch is entirely cutaneous.

Question 6

What structures are found between metacarples holding tendons in place?

Answer 6

Intertendonous bands

Question 7

In the forearm, how many carpi muscles are there?

Answer 7

Five. FCU ECU FCR ECRB ECRL

Question 8

What are the actions of the carpi muscles?

Answer 8

Flexors Extensors Ulnaris together = Adduction Radialis together = Abduction

Question 9

Answer 9

APL

Question 10

Answer 10

Aconeus

Question 11

Answer 11

Question 12

Answer 12

Question 13

Answer 13

Brachioradialis

Question 14

Answer 14

ECRB

Question 15

Answer 15

ECRL

Question 16

Answer 16

ECU

Question 17

Answer 17

EDM

Question 18

Answer 18

ED

Question 19

Answer 19

EI

Question 20

Answer 20

EPB

Question 21

Answer 21

EPL

Question 22

Answer 22

Supinator

Question 23

Answer 23

Question 24

Answer 24

Question 25

Answer 25

Question 26

Answer 26