Median Nerve & Cubital Fossa

Question 1

Median nerve is formed by

Answer 1

Two roots;

Medial root (Medial cord)
Lateral root (Lateral cord)

Question 2

Median nerve is crossing the brachial artery from which side

Answer 2

From the lateral side to the Medial side

Question 3

Most medial structure of Cubital Fossa;

Answer 3

Median Nerve

Question 4

How Median nerve enters the Forearm?

And it supplies?

Answer 4

By passing between the Heads of Pronator teres muscle

Supplies the Flexors of Forearm

Question 5

List Superficial Flexors of Forearm;

Answer 5

1. Pronator teres
2. Flexor carpi radialis
3. Palmaris longus
4. Flexor carpi ulnaris
5. Flexor digitorum superficialis

Question 6

Superficial flexors of forearm takes origin from;

Answer 6

Medial Epicondyle

Question 7

Action of Pronator teres;

Answer 7

Pronation

Question 8

Action of Flexor carpi radialis;

Answer 8

• Flexion of Wrist

- Radial Deviation

Question 9

Action of Palmaris longus;

Its continuation in the palm as

Answer 9

Flexion of Wrist

As Palmar Aponeurosis

Question 10

Action of Carpi Ulnaris;

Answer 10

• Flexion of wrist

- Ulnar deviation

Question 11

Attachment and Action of Flexor digitorum superficialis;

Answer 11

It is attached upto Middle phalanx

Flexion of →

• Wrist
• MCP Joint
• Proxima IP Joint

Question 12

Median Nerve directly supplies only Four Muscles;

Answer 12

Pronator teres
Flexor carpi radialis
Palmaris longus
Flexor digitorum superficialis

Question 13

Anterior Interosseus Nerve (branch of Median Nerve) supplies;

Answer 13

2 1/2 Muscles;

• Pronator Quadratus
• Flexor policis longus
• Lateral 1/2 of Flexor digitorum profundus

Question 14

List Deep flexors of forearm;

Answer 14

1. Flexor digitorum profundus
2. Flexor policis longus
3. Pronator quadratus

Question 15

Action of Flexor digitorum profundus;

Answer 15

Flexion of →

• Wrist
• MCP Joint
• Proximal and Distal IP Joint

Question 16

Lumbrical muscles take origin from ←

Answer 16

Tendon of Flexor digitorum profundus

Question 17

Ulnar nerve supplies;

Answer 17

1 1/2 Muscles in the forearm;

Flexor carpi ulnaris (superficial)

Medial 1/2 of Flexor digitorum profundus (deep)

Question 18

What is Gantzers muscle

Answer 18

In some pateints;

If Flexor pollicis longus have an Accessory Head → called as Accessory Head of Flexor Pollicis Longus
AHFPL

Question 19

If AHFPL is present it compresses →

Answer 19

Anterior Interosseous Nerve

Question 20

Jersey finger is due to

Answer 20

Avulsion of Flexor digitorum profundus (FDP) tendon

→ causes loss of flexion of Distal IP Joint

Caused by Violent traction on flexed distal phalanx, as in catching on jersey of running football player

Question 21

Median nerve enters the palm by passing

Answer 21

Below the Retinaculum

Question 22

Median nerve in the palm is divided into

Answer 22

Medial and Lateral Branch

Question 23

Before dividing Median nerve gives one Motor Branch →

And it supplies →

Answer 23

Recurrent Branch

Supplies → Thenar Eminence Muscles

Question 24

The branch of median nerve passing above the Flexor Retinaculum and it Supplies

Answer 24

Palmar branch of Median Nerve

Gives sensory supply to Thenar Eminence

Question 25

Proper Palmar Digital Branch supplies;

Answer 25

Sensory Supply to * Lateral 3 1/2 digits on the Palmar side * Distal and Middle Phalanx of the lateral 3 1/2 digits

Question 26

Supination of Forearm done by;

Answer 26

Supinator → supplied by Posterior Interosseous nerve Biceps brachii → Supplied by Musculocutaneous nerve

Question 27

MC affected nerve in Wrist Slash Injury;

Answer 27

Median Nerve Due to inflicted cut in the distal forearm (wrist regoin)

Question 28

Intact muscles and functions in Wrist slash injury;

Answer 28

* All the forearm flexors which are supplied by Median Nerve will be Normal * On Wrist flexion - no ulnar deviation * Pronation not affected * FDP Lateral 1/2 and FDS → No Benediction hand deformity No Pointing index finger

Question 29

Function lost in Wrist slash injury;

Answer 29

LOAF Muscles paralysed → atrophy of the thenar muscle → Ape thumb deformity Loss of sensation over the Lateral 3 1/2 digits + Thenar eminence

Question 30

Compression of Median nerve while passing below the Flexor Retinaculum → result into

Answer 30

Carpal tunnel syndrome Features are same as Wrish slash injury except → Sensory supply over Thenar Eminence is Normal

Question 31

Why in carpal tunnel syndrome sensation over Thenar Eminence is normal

Answer 31

Because Palmar Cutaneous branch of Median Nerve passes above the Flexor Retinaculum

Question 32

Boundaries of Cubital Fossa; Medially - Laterally - Apex - Base -

Answer 32

Medially - lateral border of Pronator teres Laterally - medial border of Brachioradialis Apex - meeting point of brachioradialis and pronator teres Base - imaginary line connecting the two Epicondyle

Question 33

Roof of Cubital Fossa is formed by

Answer 33

* Bicipital aponeurosis- derided from biceps tendon | * Median cubital vein

Question 34

Floor of Cubital fossa is formed by

Answer 34

* Brachialis muscle | * Supinator muscle

Question 35

Contents of Cubital Fossa - M B B S

Answer 35

M- Medial nerve B- Brachial artery B- Biceps tendon S- Superficial branch of Radial Nerve