Plexuses

Question 1

Means braid, a briad or intermingling of several spinal nerves

Answer 1

Plexus

Question 2

A network of nerves supplying the UE (arm)

Answer 2

Brachial Plexus

Question 3

Which ventral rami form brachial plexus

Answer 3

C5,6,7,8,T1 spinal nerves

Question 4

RTDCB

Robert Taylor Drinks Cold Beer

Answer 4

Rami
Trunks
Divisions
Cords
Branches

Question 5

Where are the rami that form the brachial plexus located?

Answer 5

Neck, superior to the clavicle

Question 6

Distal to the rami trunks are formed..

Upper trunk is formed by
Middle trunk is formed by
Lower trunk is formed by

Answer 6

C5 and C6

C7

C8 and T1

Question 7

Each trunk divides into two divisions, name them

Answer 7

Anterior and Posterior Divisions

Question 8

What does the anterior division of brachial plexus supply?

What about the posterior division?

Answer 8

Flexor/Anterior compartment of the arm

Extensor/posterior compartment of the arm

Question 9

Distal to the divisions, 3 cords are formed. Name them

Answer 9

Lateral Cord
Medial Cord
Posterior Cord

Question 10

This cord is from the anterior division of the upper and middle trunks

Answer 10

Lateral Cord

Question 11

This cord is from the anterior division of the lower trunk

Answer 11

Medial Cord

Question 12

This cord is from the posterior divisions of all 3 trunks

Answer 12

Posterior Cord

Question 13

The cords of the brachial plexus are related to the

Answer 13

Axillary Artery

Question 14

The medial cord lies __ to the artery
The lateral cord lies ___ to the artery
The posterior cord lies ___ to the artery

Answer 14

Medial
Lateral
Posterior

Question 15

Which nerves does the posterior cord form?

Answer 15

Axillary and Radial Nerve

Question 16

Which nerves does the lateral cord form?

Answer 16

Musculocutaneous and median

Question 17

Which nerves does the medial cord form?

Answer 17

Ulnar and median

Question 18

The most laterally placed nerve on the M of the brachial plexus

The most medially placed nerve on the M of the brachial plexus

What runs down the middle?

Answer 18

Musculotcutaneous nerve

Ulnar Nerve

Median nerve

Question 19

What muscles does the axillary nerve supply?

Answer 19

Deltoid and teres minor

Question 20

What muscles does the radial nerve supply?

Answer 20

Posterior Arm and Posterior Forearm

Question 21

The musculocutaneous nerve pierces the corachobrachialis and supplies what muscles?

Answer 21

Anterior muscles of the arm

Question 22

The median nerve supplies which muscles?

Answer 22

Anterior forearm muscles

Lateral and Deep muscles of the hand

Question 23

What muscles does the ulnar nerve supply?

Answer 23

Anterior muscles of the forearm

Medial muscles of the hand

Question 24

Injury to the MC nerve would cause weakening of what actions?

Answer 24

Forearm Flexion and Supination

Question 25

A fraction of the humerus typically leads to an injury to the radial nerve. What actions would weaken?

Answer 25

Wrist extension (Wrist Drop) Extension of the forearm

Question 26

Injury to the median nerve would weaken what actions?

Answer 26

Flexion of 2nd and 3rd fingers

Question 27

Injury to the ulnar nerves weakens what actions?

Answer 27

Loss of hand muscles except thenar group

Question 28

Which plexus supplies the lower limbs?

Answer 28

Lumbosacral plexus

Question 29

Which spinal nerves does the lumbosacral plexus comprise?

Answer 29

L1-5, S1-4

Question 30

What part of the body does the lumbar plexus formed from L1-L5 supply?

Answer 30

Anterior and Medial thigh

Question 31

What muscle of the body does the lumbar plexus formed from L1-3 supply?

Answer 31

Psoas Major, before specific nerve is formed

Question 32

What muscle and part of the body does the femoral nerve L2-4 supply?

Answer 32

Iliacus (hip) | Anterior Thigh

Question 33

What part of the body does obturator nerve L2-4 supply?

Answer 33

Medial Thigh

Question 34

Ventral rami of L2-4 unite to form two nerves

Answer 34

Femoral nerve and obturator nerve

Question 35

NAVEL in the femoral triangle (lateral to medial)

Answer 35

Nerve artery vein

Question 36

obturator nerve splits into two, femoral does not

Answer 36

!

Question 37

Formation of the sacral plexus is by the lumbosacral trunk and ventral rami, which nerves do these correspond to?

Answer 37

Lumbosacral trunk - L4,5 | Sacral Ventral Rami S1-4

Question 38

Sciatic nerve is formed by lumbosacral trunk and which sacral nerves?

Answer 38

S1,2,3

Question 39

The longest and thickest nerve in the body is

Answer 39

Sciatic nerve

Question 40

What does the sciatic nerve supply?

Answer 40

Lower limb except anterior and medial thigh

Question 41

What nerves does the sciatic nerve split off to make?

Answer 41

Common fibular nerve | tibial nerve

Question 42

The larger component of the sciatic nerve, it supplies most of the hamstring and the posterior leg;

Answer 42

Tibial Nerve

Question 43

What muscles of the leg does the tibial nerve supply?

Answer 43

The posterior muscles of the leg | Muscles of the foot

Question 44

What does the tibial nerve divide into?

Answer 44

Medial and Lateral Plantar Nerve

Question 45

The smaller, lateral division of the sciatic nerve and is superficial to the lateral compartment of the leg and divides into superficial and deep branches

Answer 45

Common Fibular Nerve

Question 46

Branch of sacral plexus that supplies the gluteus medius and minimus, and tensor facia latae

Answer 46

Superior Gluteal Nerve

Question 47

Branch of the sacral plexus that supplies the gluteus maximus

Answer 47

Inferior Gluteal Nerve

Question 48

Branch of the sacral plexus that supplies the muscles and skin of the perineum (rea between thighs from coccyx to pubis)

Answer 48

Pudendal Nerve

Question 49

Branches of the sacral plexus also supply lateral rotators of the thigh, which spinal nerves? -piriformis, quadratus femoris, inferior/superior gamellae

Answer 49

L5,S1, S2

Question 50

An injury to the femoral nerve would cause a loss of what action?

Answer 50

Leg extension (strong)

Question 51

Injury to the obturator nerve would cause loss of what action?

Answer 51

Adduction of the thigh

Question 52

Injury to the tibial nerve would cause the loss of what actions?

Answer 52

Plantar Flexion (strong), Inversion, Extension of thigh (weak)

Question 53

Injury to the superficial fibular would cause the loss of what action?

Answer 53

Eversion

Question 54

Injury to the deep fibular nerve would cause the loss of what action?

Answer 54

Dorsiflexion, inversion of the foot (weak)

Question 55

A rupture of the annulus fibrosus allowing the protusion of the nucleus pulposus Pushes on the nerve root exiting from the cord

Answer 55

Herniated Disc

Question 56

Which region is herniated discs common?

Answer 56

Lumbar region sciatic nerve and its components are affected | -area subjected to weight bearing activity

Question 57

Do all peripheral nerves(radial/tibial) carry both motor and sensory information?

Answer 57

Yes