Forearm (Week 11)

Question 1

Pronator Teres Att.

Answer 1

P: medial epicondyle and coronoid
process of ulna
D: proximal radius

Question 2

Pronator Teres A/NS

Answer 2

Action: forearm pronation and
elbow flexion
NS: median n.

Question 3

Flexor Carpi Radialis Att.

Answer 3

P: medial epicondyle of humerus
D: palmar surface of base of 2nd
metacarpal

Question 4

Flexor Carpi Radialis A/NS

Answer 4

Action: wrist flexion and radial
deviation (abd)
NS: median n.

Question 5

Palmaris Longus Att.

Answer 5

P: medial epicondyle of humerus
D: flexor retinaculum and palmar
aponeurosis

Question 6

Palmaris Longus A/NS

Answer 6

Action: wrist flexion
NS: median n.

Question 7

Flexor Carpi Ulnaris Att.

Answer 7

P: medial epicondyle of humerus
D: palmar surface of pisiform, hook
of the hamate and base of 5th
metacarpal

Question 8

Flexor Carpi Unlaris A/NS

Answer 8

Action: wrist flexion and ulnar
deviation (add)
NS: ulnar n.

Question 9

Flexor Digitorum Superfificalis Att.

Answer 9

P: medial epicondyle of humerus
D: middle phalanges of digits 2 - 5

Question 10

Flexor Digitorum Superfificalis A/NS

Answer 10

Action: flexion at wrist,
metacarpophalangeal and proximal
interphalangeal joints of digits 2 - 5
NS: median n.

Question 11

Flexor Digitorum Profundus Att.

Answer 11

P: proximal anterior medial surface of ulna
and IOM
D: palmar surface of base of distal
phalanges of digits 2 - 5

Question 12

Flexor Digitorum Profundus A/NS

Answer 12

Action: distal interphalangeal joint flexion
of digits 2 - 5
NS: ulnar and Median nerve (anterior
interosseous n).

Question 13

Flexor Pollicus Longus Att.

Answer 13

P: anterior surface of radius and IOM
D: palmar surface of base of distal
phalange of 1st digit

Question 14

Flexor Pollicus Longus A/NS

Answer 14

Action: metacarpophalangeal and
interphalangeal flexion of 1st digit
NS: anterior interosseous n.

Question 15

Pronator Quadratus Att.

Answer 15

P: distal anterior surface of ulna
D: distal anterior surface of radius

Question 16

Pronator Quadratus A/NS

Answer 16

Action: radio-ulnar joint pronation
NS: anterior interosseous n.

Question 17

Median Nerve Supply/Course

Answer 17

C6-T1
* Near the insertion of
coracobrachialis it crosses in
front of the brachial artery and
follows the artery medially to
enter the cubital fossa
* In the cubital fossa it sits
posterior to the bicipital
aponeurosis and anterior to
brachialis

Question 18

Cubital Fossa Borders

Answer 18

Superior border
* line between the lateral & medial
epicondyles
Lateral border
* brachioradialis
Medial border
* pronator teres
Roof
* bicipital aponeurosis

Question 19

Cubital Fossa Contents

Answer 19

median nerve
* radial nerve
* brachial artery  ulnar
artery & radial artery
* tendon of biceps
* Floor = supinator
* Vulnerable to injury
(unprotected by muscle)

Question 20

Median Nerve Supply/Course Through Forearm

Answer 20

C6-T1
* Enters the forearm between 2 heads
of pronator teres
- About 5cm proximal to the flexor retinaculum
it emerges from beneath flexor digitorum
superficialis and enters the wrist
* Enters the wrist beneath the flexor
retinaculum within the carpal tunnel

Question 21

Ulnar Nerve Supply/Course

Answer 21

C7-T1
- Arises from the medial cord of the brachial plexus with
contribution from C8-T1, but often receives input from C7
* Descends distally through the axilla medial to the axillary
artery and continues medial to the brachial artery to the midarm
* Passes anterior to the medial head of triceps
- Passes posterior to the medial
epicondyle (funny bone) and enters the
forearm
* Passes through cubital tunnel formed by
humeral and ulnar heads of FCU
* Descends on the medial side of the
forearm