MMB [020] Forearm I

Question 1

Mention the two subgroups ,, of anterior forarm muscles

Answer 1

Muscles of front of forearm are arranged into ;

• a superficial group formed of 5 muscles
• & a deep group formed of 3 muscles

Question 2

Superficial group of anterior forarm muscles is formed of ….. muscles

Answer 2

Five

Question 3

Deep group of anterior forarm muscles is formed of ….. muscles

Answer 3

Three

Question 4

Mention the five superfical ,, anterior forarm muscles

Answer 4

Question 5

Name the muscle ,, and mention it’s origin(s) and insertions

Answer 5

Question 6

Action of Pronator Teres ?

Answer 6

Pronation of forearm

Question 7

……. nerve , leaves cubital fossa to enter forearm between : the 2 heads of pronator teres

Answer 7

The Median nerve

Question 8

Mention origin ,, and insertion of Flexor carpi radialis

Answer 8

Question 9

What’s the action of ; Flexor carpi radialis

Answer 9

1. Flexion of wrist
2. With extensor carpi radialis longus & brevis → abduct the hand.

Question 10

An anterior forarm muscle that might be absent ?

Answer 10

Palmaris Longus (may be absent )

Question 11

Name the muscle , and it’s insertion (s)

Answer 11

Flexor digitorum superficialis

Insertion :

• By 4 tendons for the medial 4 fingers

Question 12

Action of Flexor digitorum superficialis ?

Answer 12

flexion of proximal interphalangeal & metacarpo phalangeal joints of the medial 4 fingers

Question 13

Name the muscle ,, and it’s insertion

Answer 13

Flexor carpi ulnaris

Insertion : 5 th metacarpal

Question 14

Action of Flexor carpi ulnaris ?

Answer 14

1. Flexion of wrist joint
2. With extensor carpi ulnaris, it adducts hand

Question 15

Name the muscle and it’s insertion

Answer 15

Flexor pollicis longus

Insertion :
-terminal phalanx of thumb

Question 16

Name the muscle and it’s insertion

Answer 16

Flexor digitorum profundus

Insertion:
4 tendons → terminal phalanges of medial 4 fingers

Question 17

Action of Flexor digitorum profundus ?

Answer 17

1. Flexion of distal phalanges of medial 4 fingers
2. Helps in flexion of middle & proximal phalanges of medial 4 fingers
3. Helps in flexion of wrist

Question 18

Name the muscle and it’s insertion

Answer 18

Pronator Quadratus

Insertion : anterior surface of radius

Question 19

All superficial muscles of front of forearm are supplied by …… nerve, except FLEXOR carpi ulnaris by ….. nerve

Answer 19

Median nerve , Ulnar nerve

Question 20

All superficial muscles of front of forearm are supplied by ….. nerve, except…… muscle by ulnar nerve

Answer 20

Median nerve , FLEXOR carpi ulnaris

Question 21

All Deep Muscles Of Front Of Forearm Are Supplied By…… Nerve, Except Medial ½ Of Flexor Digitorum Profundus By….

Answer 21

Anterior Interosseous nerve ,, Ulnar Nerve

Question 22

The ulnar nerve supplies …. Muscle(s) of the forearm

Answer 22

FLEXOR carpi ulnaris ,, and Medial ½ Of Flexor Digitorum Profundus

Question 23

Answer 23

Question 24

BEGINNING OF RADIAL ARTERY ?

Answer 24

• A branch of the Braichial artery
• At level of neck of the radius in cubital fossa

Question 25

END OF RADIAL ARTERY ?

Answer 25

Continues as deep palmar arch

Question 26

Where to feel the radial pulse ?

Answer 26

Question 27

BEGINNING OF ULNAR ARTERY ?

Answer 27

• Opposite neck of radius

• Larger terminal branch of brachial artery

Question 28

END OF ULNAR ARTERY ?

Answer 28

• Divides into 2 terminal branches; superficial and deep.

Question 29

Root values of Median nerve ?

Answer 29

C5,6,7,8,T1

Question 30

How does the Median Nerve arise from the brachial plexus ?

Answer 30

It arises by two roots:

-lateral root from lateral cord
and

-medial root from medial cord.

Question 31

Name the nerve and explain it’s course

Answer 31

MEDIAN NERVE ;

• Arises by lateral root from lateral cord ,,, and medial root from medial cord

-leaves cubital fossa to enter forearm between the 2 heads of pronator teres

Question 32

The….. nerve supplies the lateral ½ of the flexor digitorum profundus ,flexor policis longus and pronator quadratus.

Answer 32

anterior interosseous nerve

Question 33

The….. branch of Median nerve supplies the sensory lateral 2/3 of the palm

Answer 33

Palmar cutaneous

Question 34

The…. branch of Median nerve : arises above the flexor retinaculum

Answer 34

Palmar cutaneous branch

Question 35

Causes of : Carpal Tunnel Syndrome ?

Answer 35

Compression of the median nerve within the carpal tunnel

Question 36

General Clinical features of : Carpal Tunnel Syndrome (CTS) ?

Answer 36

-numbness

-tingling

-and pain in the distribution of the median nerve

Question 37

Root value and roots of Ulnar nerve ?

Answer 37

—Root value is C7,8,T1.

— It arises from the medial cord of the brachial plexus .

Question 38

Course of Ulnar nerve ?

Answer 38

—Passes behind medial epicondyle

—It enters the forearm by passing between the two heads of the flexor carpi ulnaris

Question 39

Near the wrist ,the ulnar nerve become superficial and pass superficial to the….(ct structure)

Answer 39

flexor retinaculum

Question 40

The muscular branches of Ulnar nerve ?

Answer 40

Two muscular branches :

-to flexor carpi ulnaris

-and medial ½ of the flexor digitorum profundus.

Question 41

The cutaneous branches of Ulnar nerve ?

Answer 41

Two cutaneous branches:

— supply medial 1/3 of the palm of the hand .

— & medial 1/3 of the dorsum of the hand

— and dorsum of the medial one and half fingers

Question 42

Name the condition ?

Answer 42

Extension- compression fracture of distal radius

Question 43

Colles fracture ?

Answer 43

Distal fracture of the radius in the forearm with dorsal (posterior) displacement of the wrist and hand

Question 44

Smiths fracture ?

Answer 44

• The distal fracture fragment is displaced ventrally, as opposed to a Colles’ fracture which the fragment is displaced dorsally.