Median Nerve

Question 1

Median nerve arises from which cord of brachial plexus?

Answer 1

Medial cord
Lateral cord

Question 2

Median nerve arises from which roots?

Answer 2

All 5(C5- T1)

C5
C6
C7
C8
T1

Question 3

Median nerve gives rise to which sensory branches?

Answer 3

1.Palmar cutaneous branch
(Lateral part of palm)

2.Digital cutaneous branch
(3 lateral fingers)
Thumb
Index
Middle

Question 4

Initially Medial nerve is _______ to brachial artery?

Answer 4

Initially—–Lateral
Then becomes more —-medial

Question 5

Median nerve enters the elbow at?

Answer 5

Cubital fossa
|
Then enters to anterior compartment of forearm

Question 6

Within the forearm, the median nerve travels between which two muscles?

Answer 6

1. Flexor dogitorum superficialis
2. Flexor digitorum profundus

Question 7

The two branches of median nerve in forearm?

Answer 7

1. Anterior interosseous nerve (proximally)
2. Palmar cutaneous nerve
   (Distally)

Question 8

The anterior interosseous branch of median nerve supplies? Name the muscles

Answer 8

Flexor muscles of anterior compartment of forearm:

1.Flexor pollicis longus
2.Pronator quadratus
3.Flexor digitorum profundus (lateral half)

Question 9

Palmar cutaneous nerve of median nerve passes ________ to flexor retinaculum?

Answer 9

Over

Question 10

Palmar cutaneous nerve innervates?

Answer 10

Skin of lateral palm

Question 11

Median nerve enters the hand and and divides into which branches?

Answer 11

1. Recurrent branch
2. Palmar digital branches

Question 12

Recurrent branch innervates?

Answer 12

Thenar muscles
(Abductor pollicis brevis
Flexor pollicis brevis
Opponens pollicis)

Question 13

What is CTS?

Answer 13

Carpal Tunnel syndrome
Median nerve gets compressed in Carpal tunnel eliciting pain over the coarse of median nerve

Question 14

Tests for CTS?

Answer 14

1.Tinel’s sign
Tapping the nerve in carpal tunnel to elicit pain in median nerve distribution

2.Phalen’s manoeuvre
Phalen’s maneuver is positive whenflexing the wrist to 90 degrees for 1 minute elicits symptoms in the median nerve distribution.

Question 15

Motor function of median nerve?

Answer 15

Innervates:
1.Majority muscles of anterior compartment of forearm
2. Intrinsic hand muscles

Question 16

Innervation by median nerve to anterior forearm is to which muscles?

Answer 16

Superficial layer

1. Pronator Teres
2. Flexor carpi radialis
3. Palmaris longus

Intermediate
1.Flexor digitorum superficialis

Forms anterior interosseous nerve supplies deep flexors

Question 17

Palmar cutaneous branch innervates?

Answer 17

Lateral 2 lumbricals
Of index
And middle finger
Which *
flex the MCP
Extend the IP

Question 18

What causes lesion of median nerve?

Answer 18

Damage to elbow

Question 19

In lesion of median nerve what fracture occurs?

Answer 19

Supracondylar fracture of humerus

Question 20

What are the affected motor functions in lesion of median nerve?

Answer 20

1.Paralysis of flexors (except flexor carpi ulnaris and flexor digitorum profundus)
& pronators
2. Prevention of flexion of thumb (thenar muscles) (also flexor pollicis longus + brevis are affected)
3. Lateral 2 lumbricals;
Middle and index

Question 21

What are characteristic signs of lesion of median nerve?

Answer 21

1. Atrophy of thenar muscles
2. Hand of benediction
   When try to make a fist, only little and ring fingera are flexed

Question 22

Median nerve passes ________ to flexor retinaculum?

Answer 22

Behind

Question 23

Is flexor pollicis longus affected by CTS?

Answer 23

No, as median nerve innervates it before passing through carpal tunnel

Question 24

Median nerve lies deep to ______ in the cubital fossa?

Answer 24

Bicipital aponeurosis

Question 25

Median nerve leaves cubital fossa by passing between?

Answer 25

2 heads of pronator teres

Question 26

At the wrist, the median nerve emerges from ______ border of flexor digitorum superficialis?

Answer 26

Lateral

Question 27

At wrist, median nerve lies ______ the tendon of palmaris longus?

Answer 27

Behind