Spinal Cord and Spinal Nerves Flashcards Preview

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Flashcards in Spinal Cord and Spinal Nerves Deck (24):
1

The spinal cord is a part of what system?

Central Nervous System

2

Characteristics of the Spinal Cord... (4)

1. Slender nerve column
2. About 45 cm long
3. Starts at foramen magnum and ends between L1 and L2 (does not go to the sacrum)
4. 31 pairs of spinal nerves

3

Overall structure of the Spinal Cord...

-Bilateral symmetry
-Consists of both gray and white matter
-Central canal
-2 grooves

4

Hole down the center of the spinal cord, continuous with brain ventricles, both contain CSF

Central Canal

5

2 grooves within the Spinal Cord

1. Anterior median fissure
2. Posterior median sulcus

6

-Swollen regions of the spinal cord

Enlargements

7

2 examples of enlargements

1. Cervical Enlargements
2. Lumbar Enlargements

8

The inferior most tip of the spinal cord; cone shaped

Conus medullaris

9

-Means horses tail
-Bundle of nerves inferior to spinal cord

Cauda Equina

10

Inferior most spinal nerve

Filum Terminale

11

-Cell bodies, dendrites, and synapses
-Projections called horns
-Cell bodies organized into nuclei
(sensory and motor)

Gray Matter

12

Inferior horns of the gray matter (3)

1. Posterior horn
2. Anterior gray horn
3. Lateral gray horn

13

Gray commissure (2)

1. Anterior commissure
2. Posterior commissure
(separated by the central canal)

14

Tracts and columns aka...

White matter

15

Types of columns (3)

1. Posterior White Column
2. Anterior white column
3. Lateral White Column

16

Types of Tracts (2)

1. Ascending tract
2. Descending Tract

17

-Membranes covering the CNS
-Are similar in both brain and spinal cord

Meninges

18

Meninges are split into layers called...

Mater

19

Vertebrae consist of...

Vertebral arches

20

-Space between meninges and vertebrae
-Contains blood vessels and adipose

Epidural Space

21

________ connect to CT covering of spinal nerves

Meninges

22

3 types of Spinal Meninges

1. Dura Mater
2. Arachnoid Mater
3. Pia Mater

23

Characteristics of Dura Mater (5)

1. Tough Mother
2. Durable
3. Deep to epidural space
4. Superficial to subdural space
5. Stabilized by coccygeal ligament

24

Characteristics of Arachnoid Mater (3)

1. Spidery mother
2. Superficial to subarachnoid space
3. Contains CSF