Nerves Overview

Question 1

2. What encloses the Spinal Cord

Answer 1

vertebral column

Question 2

what 4 things are in a typical vertebra

Answer 2

• body
• pedicles
• vertebral (neural) arch
• spinal canal

Question 3

4. What is the spinal cord is continuous with?

Answer 3

• Continuous with the brain

Question 4

5. Where does the spinal cord receive afferent fibres from

Answer 4

sensory receptors in trunk and limbs

Question 5

6. What movements does the spinal cord control

Answer 5

movements of the trunk and limbs

Question 6

7. What does the spinal cord provide for the autonomic innervation

Answer 6

most of the viscera

Question 7

10. What does the spinal nerve divide into within the intervertebral foramen.

Answer 7

the spinal nerve divides into an anterior (ventral) and posterior (dorsal) ramus

Question 8

11. Give 2 features of ventral rami

Answer 8

• Are usually larger and supply the limbs and the anterolateral aspects of the trunk
• They unite and divide again to form plexi, e.g. the brachial plexus which supplies the upper limb

Question 9

12. Give 1 feature of the dorsal rami

Answer 9

• Are smaller and supply back muscles, zygapophyseal joints and a narrow strip of skin on the back

Question 10

13. What is the intervertebral foramen

Answer 10

tight bony tunnel through which the spinal nerve runs

Question 11

14. What can disease processes such as osteoarthritis lead to?

Answer 11

can result in compression of spinal nerves

Question 12

15. Which vertebral level does the spinal cord extend down to

Answer 12

L1-L2

Question 13

16. What exits at each vertebral level and what does this divide into

Answer 13

Spinal nerves exit at each level and divide into anterior and posterior rami

Question 14

17. Where do spinal nerves supply

Answer 14

Spinal nerves supply specific areas of skin and specific muscle groups

Question 15

18. What does the anterior rami of spinal nerves join to form

Answer 15

The anterior rami of spinal nerves join to form a number of plexi

Question 16

19. What do peripheral named nerves exit from the plexi to supply

Answer 16

supply specific areas of skin and specific muscle groups

Question 17

20. where does the ulnar nerve supply and what vertbral level is it on

Answer 17

• Brachial plexus: supplies few muscles of the anterior forearm and MOST of the hand muscles
• C7-T1

Question 18

21. where does the median nerve supply

Answer 18

• Brachial plexus: supplies MOST of the muscles of the anterior forearm and a few muscles in the hand
• C5-T1

Question 19

22. where does the radial nerve supply

Answer 19

• brachial plexus: supplies ALL of the muscles of the posterior forearm and NONE of the muscles in the hand
• C5-T1

Question 20

where does the femoral nerve innervate and what vertebral levels is it

Answer 20

• Lumbar Plexus
• L2-L4

Question 21

where does the sciatic nerve innervate and what vertebral level is it

Answer 21

• Lumbar plexus
• L4-S3

Question 22

where does the Tibal nerve innervate

Answer 22

the calf muscles

Question 23

where does the common fibular nerve innervate