Spinal nerves Flashcards Preview

spinal cord > Spinal nerves > Flashcards

Flashcards in Spinal nerves Deck (18)
Loading flashcards...
1

How does the spinal nerves arise from the spinal cord?

in pairs
one left one right
one pair for each spinal cord segment

2

How are the nerve formed?

union of the ventral and dorsal spinal nerve roots
as they travel through the vertebral foramina

3

What part of the nervous system does the spinal nerves belong?

peripheral nervous system

4

where does the ventral root arise?

ventral lateral sulcus

5

What do the ventral root transmit?

peripheral process of the lower motor neuron

6

From Where does the dorsal root emerge?

lateral sulcus of the spinal cord

7

What is located along each dorsal root?

dorsal root ganglion

8

What does the dorsal root ganglion contain?

neuronal cell bodies of sensory neurons

9

What does the dorsal root transmit?

peripheral processes of the sensory neuron to the spinal nerve and the central processes of the sensory neuron into the dorsal horn of the spinal cord

10

What are rami?

main branches of spinal nerve
they contain both motor and sensory fibers

11

What does the first division of spinal nerve create?

dorsal and ventral rami

12

How many pair of spinal nerves are there?

31 pair of spinal nerve
each pair arise from a spinal cord segment

13

How many cervical spinal nerves are there?

8 each exits above the arch of the vertebrae of same number except C-8 which enters above T1 and below C7

14

How many thoracic spinal segment are there?

12
each spinal nerve exits the vertebral foramina below of the same number

15

How many lumbar spinal segments are there?

5
each spinal nerve exit the foramina the segment below of the same number

16

How many sacral segments are there?

5
The ventral rami exit the anterior sacral foramina
the dorsal rami exit the posterior sacral foramina

17

How many coccygeal spinal segments re there?

1
the exit the canal through the sacral hiatus

18

What do they do not have a dermatome for?

C1 spinal nerve