W3: Spinal cord, PNS, brainstem Lab 3

Question 1

What are the rules for numbering spinal nerves?

Answer 1

C1-C7: exit above vertebrae

C8 and below: exit blow vertebrae

Question 2

What are the 4 sections of spinal nerves?

Answer 2

Cervical
Thoracic
Lumbar
Sacral

Question 3

Where do nerves from the cervical cord innervate?

Answer 3

structures of the arm (skin, muscle)

Question 4

Where do nerves from the thoracic cord innervate?

Answer 4

structures of the trunk (intercostal)

Question 5

Where do nerves from the lumbar cord innervate?

Answer 5

structures of the leg (sciatic and tibial nerves)

Question 6

Cutaneous nerves

Answer 6

some peripheral nerces that innervate only on cutaneous receptors (tactile sensations)

Question 7

Mixed nerves

Answer 7

contain both motor and sensory axons.

Question 8

Plexuses

Answer 8

Network of nerves that travel together and innervate the same area (grouping of axons from two or more spinal nerves.

1) brachial plexus C5-T1
2) lumbar plexus L1-L4
3) secral plexus L4-S4
* lumbosacral plexus

Question 9

What nerve branches into the tibial nerve entering the lower leg muscle?

Answer 9

Sciatic nerve

Question 10

What types of axons are contained in a mixed nerves such as the sciatic nerve?

Answer 10

sensory and motor nerves.

Question 11

What are the 12 cranial nerves?

Answer 11

I - Olifactory 
II - Optic 
III - Oculomotor
IV - Trochlear 
V - Trigeminal 
VI - Abducens 
VII - Facial 
VIII - Vestibulocochlear 
IX - Glossopharyngeal 
X - Vagus 
XI - Spinal Accessory 
XII - Hypohglossal