The Arm & Flexor Forearm II

Question 1

antebrachial fascia:

deep fascia of the ___

continuous above w/ the ___ fascia

Answer 1

forearm

brachial fascia

Question 2

interosseous membrane:

thin, but strong membrane uniting the ___ & ___

fibers run obliquely downward & medially so that a force applied to the lower end of the ___ (falling on an outstretched hand) is transmitted to the ___, then ___, then ___

attachment site for many ___

Answer 2

radius
ulna

ulna
humerus
scapula

muscles

Question 3

flexor retinaculum:

thickening of deep fascia that holds the ___ tendons in position at the ___

converts the concave anterior surface of the ___ into an ___ (___) for passage of the ___ nerve & the ___ tendons

Answer 3

long flexor tendons
wrist

hand
osteofibrous (carpal) tunnel
median nerve
long flexor tendons

Question 4

flexor retinaculum:

attached medially to the ___ bone & ___

attached laterally to the ___ & ___ bones

the proximal border corresponds to the ___ skin crease in front of the ___

Answer 4

pisoform bone
hook of the hamate

scaphoid & trapezium bones

distal transverse skin crease
wrist

Question 4

flexor retinaculum:

Carpal tunnel syndrome will involve the ___ nerve but not the ___ nerve

The ___ nerve and artery are outside of the flexor retinaculum

Answer 4

Median nerve
Ulnar nerve

Ulnar

Question 5

extensor retinaculum:

thickening of deep fascia across the back of the ___

holds the ___ tendons in position

attached medially to the ___ bone & ___

attached laterally to the distal end of the ___

Answer 5

wrist

long extensor tendons

pisiform bone
hook of the hamate

radius

Question 6

anterior (flexor) compartment of the forearm:

arteries (2)

nerve supply:

• all of the muscles are innervated by the ___ nerve
• except the ___ & medial 1/2 of the ___
• these are supplied by the ___ nerve

Answer 6

radial & ulnar arteries

median nerve
flexor carpi ulnaris
flexor digitorum profundus
ulnar nerve

Question 7

superficial muscles of the anterior compartment (4)

Answer 7

pronator teres
flexor carpi radialis
palmaris longus
flexor carpi ulnaris

Question 8

superficial muscles of the anterior compartment:
pronator teres:

nerve(s)

action(s)

Answer 8

median nerve

pronation & flexion of the forearm

Question 9

superficial muscles of the anterior compartment:
flexor carpi radialis:

nerve(s)

action(s)

Answer 9

median nerve

flexes & abducts the wrist joint

Question 10

superficial muscles of the anterior compartment:
palmaris longus:

nerve(s)

action(s)

Answer 10

median nerve

flexes the wrist

Question 11

superficial muscles of the anterior compartment:
flexor carpi ulnaris:

nerve(s)

action(s)

Answer 11

ulnar nerve

flexes & adducts the wrist

Question 12

intermediate muscles of the anterior compartment (1)

Answer 12

flexor digitorum superficialis

Question 13

intermediate muscles of the anterior compartment:
flexor digitorum superficialis:

nerve(s)

action(s)

Answer 13

median nerve

flexes fingers, knuckles, & wrist

Question 14

deep muscles of the anterior compartment (3)

Answer 14

flexor pollicus longus
flexor digitorum profundus
pronator quadratus

Question 15

deep muscles of the anterior compartment:
flexor pollicus longus:

nerve(s)

action(s)

Answer 15

anterior interosseous branch of median nerve

flexes thumb

Question 16

deep muscles of the anterior compartment:
flexor digitorum profundus:

nerve(s)

action(s)

this is the only muscle which (flexes/extends) the distal ___ of the (medial/lateral) (#) ___

Answer 16

ulnar & median nerves (anterior interosseous branch)

flexes fingers, knuckles, & wrist

flexes
distal phalanges of hte medial four fingers

Question 17

deep muscles of the anterior compartment:
pronator quadratus:

nerve(s)

action(s)

Answer 17

anterior interosseous branch of median nerve

pronates the forearm

Question 18

arteries of the flexor compartment of the forearm (2)

Answer 18

ulnar artery

radial artery

Question 19

arteries of the flexor compartment of the forearm:
ulnar artery:

large terminal branch of the ___ artery

descends deep to the ___ muscle

runs through the ___ with the ___ nerve

Answer 19

brachial artery

pronator teres muscle

forearm
ulnar nerve

Question 20

arteries of the flexor compartment of the forearm:
ulnar artery:

emerges at the ___ w/ the ___ nerve lateral to the ___ bone & (superficial/deep) to the ___

Answer 20

wrist
ulnar nerve
pisiform bone
superficial
flexor retinaculum

Question 21

arteries of the flexor compartment of the forearm:
ulnar artery:
important branches in the forearm (3)

Answer 21

anterior ulnar recurrent artery
posteiror ulnar recurrent artery
common interosseous artery

Question 22

arteries of the flexor compartment of the forearm:
ulnar artery:

branches of the common interosseous artery (2)

second artery gives off the ___ artery

Answer 22

anterior interosseous artery
posterior interosseous artery

interosseous recurrent artery

Question 23

arteries of the flexor compartment of the forearm:
radial artery:

runs along the (medial/lateral) forearm partially under the cover of the ___ muscle

approaches the ___ b/n the ___ & the ___ muscle

Answer 23

lateral
brachioradialis

wrist
radius
flexor carpi radialis muscle

Question 24

arteries of the flexor compartment of the forearm:

important branches of the radial artery (2)

second artery unites w/ the terminal part of the ___ artery completing the ___

Answer 24

radial recurrent branch
superficial palmar branch

ulnar artery
superficial palmar arch

Question 25

nerves of the flexor compartment (2)

Answer 25

median nerve

ulnar nerve

Question 26

nerves of the flexor compartment:
median nerve:

appears in the ___ fossa medial to the ___ artery

passes b/n the two heads of the ___ muscle

courses in the plane b/n the ___ & the ___ whethere it gives off the ___ nerve

Answer 26

cubital fossa
brachial artery

pronator teres muscle

flexor digitorum superficialis
flexor digitorum profundus
anterior interosseous nerve

Question 27

nerves of the flexor compartment:
median nerve:

at the wrist, it emerges from the lateral border of the ___ muscle & lies behind the tendon of the ___

enters the palm of the hand (superficial/deep) to the flexor retinaculum

Answer 27

flexor digitorum superficialis muscle
tendon of the palmaris longus

deep

Question 28

nerves of the flexor compartment:
ulnar nerve:

enters the front of the forearm passing b/n the two heads of the ___

runs down the forearm b/n the ___ & the ___ muscles

enters the palm of the hand (superficial/deep) to the flexor retinaculum & lateral to the ___ bone

Answer 28

flexor carpi ulnaris

flexor carpi ulnaris
flexor digitorum profundus

superficial
pisiform bone