Podcast 2

Question 1

There are 4 features of the nerve roots from CNS and PNS name the first two

Answer 1

1) Nutrition: 50% CNS and 50% blood supply (PNS)

2) Surrounded by CT : susceptible to compression and chemical irritation

Question 2

Name the last two features of nerve roots from CNS and PNS

Answer 2

1) Normal NR does not= Mechanosensitive
Only when chemical sensitised to become sensitive to touch

2) Normal dorsal root ganglion (DRG)
Mechano and chemo sensitive

Question 3

What does the cervical plexus comprise of

Answer 3

C1 to C4

Question 4

What does the brachioplexus comprised of

Answer 4

C4 to T1
Musculocutaneous
Median 
ulnar 
radial
         Nerves

Question 5

What does the Lumbar plexus comprise of

Answer 5

L2 to L4

Femoral nerve

Question 6

What does the lumbosacral Plexus comprise of

Answer 6

Sciatic nerve

• tibial
• common peroneal

Question 7

What is the PN of the upper limbs

Answer 7

Radial
Ulnar 
Medial 
Musculocutaneous 
              =nerves

Question 8

PN in of the lower limb

Answer 8

Femoral nerve
Sciatic nerve
Obturatur

Question 9

Three main demands of the CNS

Answer 9

1) Strong CT= Dura / arachnoid/ pia mater
2) CT innervater= inflam and ischaemia can cause Sx
3) sinuvertebral

Question 10

Name three demands of the PNS

Answer 10

1) Strong CT= cepi/peri/endoneurium
2) CT innervated= nervi nevorum
3) Designed to unfold when elongation load apply