Spinal Cord and Nerves Flashcards Preview

Systemic Anatomy Unit 2 > Spinal Cord and Nerves > Flashcards

Flashcards in Spinal Cord and Nerves Deck (111)
Loading flashcards...
1

The spinal cord contains what?

Neural circuits

2

What does the spinal cord do?

Controls some of the quickest reactions to environmental changes.

3

The site for integration of neuronal stimulation is where?

Spinal Cord

4

What does the spinal cord relay?

Sensory nerve impulses

5

What is the outer layer of meninges?

Dura Mater

6

Where is outer layer of the meninges located?

Epidural space

7

What is the middle layer of the meninges?

Arachnoid Mater

8

Where is the middle layer of the meninges located?

Subarachnoid space with cerebrospinal fluid.

9

What is the inner layer of meninges?

Pia mater
Delicate

10

Where is the inner layer of the meninges located?

Coccygeal and Denticulate ligaments.

11

What are meninges?

Connective tissue coverings that encircle the spinal cord and brain.

12

What is outer layer of meninges composed of?

Dense irregular connective tissue.

13

What is the middle layer of meninges composed of?

It's an avascular covering composed of delicate collagen fibers and some elastic fibers.

14

What is the layer between the dura mater and the arachnoid mater?

Subdural space

15

What are denticulate ligaments?

Thickenings of the Pia mater suspend the spinal cord in the middle of the dural sheath.

16

What shape is the spinal cord?

Oval

17

Where does the spinal cord extend from?

The medulla oblongata to the superior border of the second lumbar vertebra.

18

What is the length of the adult spinal cord?

42-45 cm

19

What are the two conspicuous enlargements in the spinal cord?

Cervical enlargement
Lumbar enlargement

20

What is the tapering end of the spinal cord inferior to the lumbar enlargement called?

Conus Medullaris

21

Where does the tapering end of the spinal cord end?

Ends at the level of the intervertebral disc between the first and second lumbar vertebrae.

22

What is the extension of the Pia mater?

Filum Terminale

23

What does the film terminals fuse with?

Arachnoid mater and dura mater, anchors the spinal cord to the coccyx.

24

What are spinal nerves?

Paths of communication between the spinal cord and specific regions of the body.

25

What does each pair of spinal nerves have?

Spinal segment

26

How many pairs of cervical nerves are there?

8

27

How many pairs of sacral nerves are there?

5

28

How many pairs of coccygeal nerves are there?

1

29

What connects the spinal nerve to the segment of the cord?

Rootlets

30

The posterior (dorsal) root conduct nerve impulses for what?

Sensory receptors in the skin, muscles, and internal organs into the central nervous system.