Nerves Of Upper Limb -Sem 4

Front 1

What is the nerve of the anterior compartment of the arm(Biceps,coraco,brachialis)?

Back 1

Musculocutaneous nerve

Front 2

Does the musculocutaneous nerve pierce the coracbrachialis?

Back 2

Yes.

Front 3

What gives rise to the lateral cord?

Back 3

Anterior divisions of the upper and middle trunk.

Front 4

What gives the medial cord?

Back 4

Anterior division of INFerior trunk.

Front 5

What do the lateral and medial cord supply?

Back 5

Flexor muscles and skin.

Front 6

All 3 posterior divisions unite to form

Back 6

Posterior cord.

Front 7

The cords are named according to

Back 7

Position wrt to Axillary artery.

Front 8

What are the 3 trunks?

Back 8

-Upper(C5,C6)
-Middle(C7)
-Lower/Inferior(C8,T1)
All have both ant. and post. divisions.

Front 9

The trunks come from the

Back 9

Roots(C5-T1)

Front 10

What do ant. division fibres always supply?

Back 10

Flexor muscles and skin overlying.

Front 11

What do post. division fibres supply?

Back 11

Extensor muscles and skin overlying.

Front 12

From which rami is the nerve supply to limbs?

Back 12

Ventral.

Front 13

What is a prefixed brachial plexus?

Back 13

C4 included.(T2 included if postfixed)

Front 14

Roots---> trunks--->ant./post. divisions--->Cords

Back 14

True

Front 15

What nerves do the posterior cord give?

Back 15

-Axillary nerve
-Radial nerve

Front 16

What muscles does the axillary nerve supply?

Back 16

-Deltoid
-Teres minor

Front 17

Radial nerve supplies every other extensor in arms and forearms.

Back 17

True

Front 18

Ulnar and median nerve supply flexor compartment of upper limb.

Back 18

True

Front 19

From which cord does the ulnar nerve arise?

Back 19

Median cord.

Front 20

Median nerve is made up of

Back 20

-Lateral root from lateral cord
-Medial root from medial cord

Front 21

Roots and trunks are

Back 21

Supraclavicular.

Front 22

Where do the divisions happen?

Back 22

Behind clavicle.

Front 23

Are the cords and terminal branches supra or infra clavicular?

Back 23

Infraclavicular.

Front 24

What is the orientation of brachial artery in the arm?

Back 24

-Ulnar nerve is medial to it.
-Musculocutaneous n. is lateral.

Front 25

From which cord does the Musculocutaneous n. arise?

Back 25

Lateral cord(Upper and middle trunk)

Front 26

What are the roots of the musculocutaneous n. ?

Back 26

C5,C6,C7

Front 27

Which muscle does the M.C n. pierce and give its orientation.

Back 27

Coracobrachialis.It descends into the ant. compartment of arm between biceps and brachialis.

Front 28

What happens to M.C n. at the tendon of the biceps at the elbow?

Back 28

M.C nerve becomes the lateral cutaneous n. of the forearm.

Front 29

The Ulnar nerve is a branch of which cord?

Back 29

Medial cord.(Ant. divisions of middle trunk)

Front 30

What are the roots of the ulnar nerve?

Back 30

C8,T1,(C7).

Front 31

Ulnar nerve starts medial to brachial artery.

Back 31

True

Front 32

What happens to ulnar nerve halfway down?

Back 32

Pierces IM septum and becomes POSTERIOR.

Front 33

Ulnar nerve passes behind which epicondyle?

Back 33

Medial epicondyle.

Front 34

What happens to Ulnar n. when it enters forearm?

Back 34

It hooks under cover of flexor carpi ulnari and Flexor Digitorum Profundum.

Front 35

What is the cutaneous supply of ulnar nerve?

Back 35

Medial 1 1/2 fingers Anteriorly and Posteriorly.

Front 36

How does the ulnar nerve enter the palm of hand?

Back 36

Superficial to Flexor retinaculum.

Front 37

Which muscles in the forearm does the Ulnar nerve supply?

Back 37

-Flex. carpi ulnaris
-Medial 1/2 of FDP it is sitting on.

Front 38

What muscles of the hands does the ulnar n. supply?

Back 38

Supplies everything that median n. doesnt supply in palm of hand.

Front 39

What are the roots from which median n. is derived?

Back 39

C5,C6,C7,C8,T1

Front 40

Which cord(s) is the median nerve derived from?

Back 40

Medial and lateral cords.

Front 41

What is the course of the median nerve in the forearm?

Back 41

Starts ANT./LAT. to brachial artery---> crosses brachial artery----> ends on MEDIAL side.

Front 42

Under the fibrous arch of which muscle is the median n. tucked under?

Back 42

Flex. Digitorum Superficialis.

Front 43

Between which 2 muscles does the median n. run through?

Back 43

F.D.superficialis and F.D. profundus

Front 44

How does the median n. enter the hands?

Back 44

It goes through Carpal tunnel and beneath Flex. retinaculum into palm of hand.

Front 45

Median nerve supplies the arms.

Back 45

FALSE.

Front 46

Median n. supplies all flexors in forearm.

Back 46

False.Doesnt supply F.C.U and 1/2 of F.D.P

Front 47

Median n. supplies muscles that move the thumb.

Back 47

True-lateral lumbricals and thenar muscles.

Front 48

Median nerve has a limited supply to palm of hands.

Back 48

True:- supplies lateral 2 lumbricals & 3 1/2 other fingers that ulnar n. doesnt supply.

Front 49

From lateral to medial,

Back 49

Biceps Tendon--->Brachial artery--->Median nerve

Front 50

Where does the post. cord lie wrt to the axillary artery?

Back 50

Behind artery

Front 51

What does the axillary n. supply?

Back 51

Area of skin over deltoid.

Front 52

What are the roots of axillary n. ?

Back 52

C5,C6

Front 53

Into which muscle does the axillary n. sink into?

Back 53

Deltoid.(then sends 1 branch to teres minor)

Front 54

When is axillary nerve endangered?

Back 54

Inferior dislocation of shoulder.

Front 55

Posteriorly, axillary nerve exits above the radial nerve.

Back 55

True

Front 56

Which nerve supplies every EXTENSOR muscles in the upper limb?

Back 56

Radial n.

Front 57

What are the roots of the radial n.?

Back 57

C5-C8,T1

Front 58

Radial n. exits axilla by passing beneath which teres muscle?

Back 58

Teres major.

Front 59

Radial n. spirals across posterior shaft of humerus from

Back 59

Medial to lateral.

Front 60

Which artery does the radial n. ride with in the arm?

Back 60

Profunda Brachia artery.

Front 61

What happens when radial nerve enters forearm?

Back 61

It tucks in under cover of brachioradialis and runs down radial side of EXT. compartment of forearm.

Front 62

Which nerve supply all muscles in posterior compartment of forearm?

Back 62

Posterior Interosseous nerve(from radial n.)

Front 63

Radial n.(with post. interosseous n) supplies

Back 63

All 12 EXTENSOR muscles in forearm and TRICEPS.

Front 64

What are the nerve supplies of the skin of arm(down lateral side of arm)?

Back 64

A-axillary nerve(upper lateral cutaneous)
R-radial nerve
M-musculocutaneous nerve(lateral side of arm)

Front 65

What is the nerve supply of the medial side of the arm?

Back 65

Post. cutaneous n. of arm

Front 66

What is a myotome?

Back 66

Muscle groups supplied by ventral ramus of spinal nerve(specific spinal nerve segment)

Front 67

Lateral cutaneous nerve of forearm is a branch of

Back 67

Musculocutaneous n. of forearm(C6)

Front 68

Pronation of hands is

Back 68

C7,C8

Front 69

Supination of hands is

Back 69

C6