lecture 14 forearm and hand muscle grouping

Question 1

how many compartments does the forearm have?

Answer 1

anterior and posterior compartments

Question 2

what separates the forearm compartments?

Answer 2

interosseous membrane

Question 3

what is the posterior compartment also known for?

Answer 3

being the extensors

Question 4

the forearm compartments have both superficial and deep members,T/F? However they do not contain pronators and supinators as well?

Answer 4

T; F they have both pronators and supinator

Question 5

what are the three forearm nerves?

Answer 5

median nerve, ulnar nerve, radial nerve

Question 6

what are the major forearm arteries?

Answer 6

radial and ulnar artery

Question 7

what are the three layers of the anterior forearm compartment?

Answer 7

superficial, intermediate, deep

Question 8

what muscles are in the superficial layers of the anterior forearm?

Answer 8

pronator teres and flexor carpi radialis, palmaris longus, flexi carpi ulnaris

Question 9

what muscles are in the intermediate layers of the anterior forearm?

Answer 9

flexor digitorum superficialis

Question 10

what muscles are in the deep layers of the anterior forearm?

Answer 10

flexor digitorum profundus, flexor pollicis longus, pronator quadratus

Question 11

what are the layers of the posterior compartment?

Answer 11

superficial and deep members

Question 12

what are the superficial muscles of the posterior forearm compartment?

Answer 12

brachioradialis
extensor carpi radialis longus
extensor carpi radialis brevis
extensor digitorum
extensor digiti minimi
extensor carpi ulnaris

Question 13

what are the deep muscles of the posterior forearm compartment?

Answer 13

supinator
extensor indicis
abductor pollicis longus
extensor pollicis longus
extensor pollicis brevis

Question 14

what are the extrinsic muscles that do not have distal attachments within the wrist?

Answer 14

palmaris longus (PL)
flexor digitiorum superficialis (FDS)
flexor digitorum profundus (FDP)
flexor pollicis longus (FPL)
extensor digiti minimi (EDM)
extensor indicis 
extensor digitorum

Question 15

what are the six compartments of the hand?

Answer 15

Dorsal-1
Palmar-5
*hypothenar
*thenar
*central
*adductor
*interosseous
* indicates compartments of the palmar side

Question 16

what are the muscles of the thenar compartment?

Answer 16

opponens pollicis
abductor pollicis brevis

deep head
adductor pollicis

Question 17

what are the muscles of the hypothenar compartment?

Answer 17

abductor digiti minimi
flexor digiti minimi brevis
opponens digiti minimi

Question 18

what are the short muscles or intermediate intrinsic muscles of the hand?

Answer 18

lumbricals (1-4) and the dorsal interossei (1-4) and palmar interossei (1-3)

Question 19

what compartments house the intrinsic muscles of the hand? name them

Answer 19

thenar and hypothenar

Thenar
A: abductor pollicis brevis.
F: flexor pollicis brevis.
O: opponens pollicis.
A: adductor pollicis.

Hypothenar
O: opponens digiti minimi.
F: flexor digiti minimi.
A: abductor digiti minimi.
“all for one and one for all”

Question 20

what is the posterolateral compartment of the forearm?

Answer 20

Brachioradialis **
Extensor carpi radialis longus 
Extensor carpi radialis brevis 
Extensor carpi ulnaris 
Extensor pollicis brevis 
Extensor pollicis longus
Extensor digitorum 
Extensor indicis 
Extensor digiti minimi