Lecture 2 - Spinal Cord

Question 1

how many cervical nerves are there?

Answer 1

8

Question 2

ow many cervical vertebrae are there?

Answer 2

7

Question 3

what is level 5/6 of the cervical nerves called?

Answer 3

cervical enlargement

Question 4

how many thoracic nerves are there?

Answer 4

12

Question 5

how many thoracic vertebrae are there?

Answer 5

12

Question 6

how many lumbar nerves and how many lumbar vertebrae are there?

Answer 6

5 of ea

Question 7

how many sacral nerves are there and what are they made of?

Answer 7

5,
5 fused vertebrae

Question 8

what is the name of the 1 nerve that comes off of the coccyx ?

Answer 8

coccygeal nerve

Question 9

how many pairs of spinal cord nerves are there in total?

Answer 9

31

Question 10

what is the cauda equina?

Answer 10

fibres bathed in cerebrospinal fluid

Question 10

what is the meningis?

Answer 10

protective covering of brain and spinal cord

Question 11

how many meningis layers are there?

Answer 11

3

Question 12

what does a dorsal root and ventral root form?

Answer 12

spinal nerve

Question 13

miessner’s corpuscle/paccinian corpuscle:
- myelinated or not?
- relate to what two things?

Answer 13

myelinated
touch and pressure

Question 14

free nerve ending:
- myelinated or not?
- relate to what two things?

Answer 14

unmyelinated
pain and extreme temperature

Question 15

What are the protective structures of the spinal cord?

Answer 15

cerebrospinal fluid, the meninges (pia, arachnoid, dura mater), vertebrae of the vertebral column

Question 16

what type of fibres pass through the dorsal root?

Answer 16

sensory fibres of the spinal nerve

Question 17

what type of fibres pass through the ventral root?

Answer 17

motor fibres of the spinal nerve

Question 18

what is the path of sensory information?

Answer 18

Sensory information passes from the periphery to the spinal cord (and then to the brain)

Question 19

what is the path of motor information?

Answer 19

motor information passes from the brain, to the spinal cord, to the periphery.

Question 20

encapsulated receptors function and structural difference (from non-encapsulated receptors)

Answer 20

Encapsulated receptors sense touch, pressure and proprioceptive information
Encapsulated receptors have a capsule surrounding the nerve ending, whereas free nerve endings do not.

Question 21

non-encapsulated receptors function
and structural difference (fromencapsulated receptors)

Answer 21

non-encapsulated receptors called free nerve endings sense temperature and pain
Encapsulated receptors have a capsule surrounding the nerve ending, whereas free nerve endings do not.