Lecture 3: Spinal cord

Question 1

How many spinal cord segments are there?

Answer 1

31
8 Cervical
12 Thoracic
5 Lumbar
5 sacral
1 coccyx

Question 2

What part of the body does the spinal cord innervate?

Answer 2

The entire body except for the head

Question 3

Where are the enlargements in the spinal cord due to nerve complexes?

Answer 3

C5-T1

L2-S4

Question 4

Bundle of spinal nerves and spinal nerve rootlets, consisting of the second through fifth lumbar nerve pairs, the first through fifth sacral nerve pairs, and the coccygeal nerve, all of which arise from the lumbar enlargement and the conus medullaris of the spinal cord.

Answer 4

cauda equina

Question 5

Matter which is rich in nerve cell bodies

Answer 5

Gray matter

Question 6

Matter which is rich in nerve cell processes

Answer 6

White matter

Question 7

Cell bodies of sensory neurons location in PNS

Answer 7

Dorsal root ganglion (spinal ganglion)

Question 8

Contains the processes of sensory neurons carrying information to the CNS

Answer 8

Posterior root

Question 9

Contains the motor fibers which carry signals away from the CNS

Answer 9

Anterior root

Question 10

Cell bodies of the primary motor neurons are in the PNS

Answer 10

Anterior horn

Question 11

What part of body does posterior ramus innervate

Answer 11

Deep back muscles

Question 12

What part of body does anterior ramus innervate

Answer 12

Superficial back muscles and all extremity muscles

Question 13

Types of sensory spinal nerves

Answer 13

Somatosensory (GSA)

Viscerosensory (GVA)

Question 14

Types of sensory motor nerves

Answer 14

Somatomotor (GSE)

Visceromotor (GVE)

Question 15

3 spinal meninges from outer to inner

Answer 15

Dura mater
Arachnoid mater
Pia mater

Question 16

Outer spinal meninge that contain epidural space for epidurals, and pathway for metastasis of cancer cells to vertebral column, spinal cord, and brain

Answer 16

Dura mater

Question 17

Middle spinal meninge

Answer 17

Arachnoid mater

Question 18

Inner spinal meninge that is inseperable from spinal cord

Answer 18

Pia mater

Question 19

Location of subarachnoid space, where CSF flows

Answer 19

Between Arachnoid and Pia mater

Question 20

Artery that supplies 2/3 of blood to anterior spinal cord

Answer 20

Anterior spinal artery

Question 21

Two arteries that supply 1/3 of blood to posterior spinal cord.

Answer 21

Posterior spinal arteries

Question 22

Artery that supplies 2/3 of blood to lower spinal cord, its occlusion may result in paraplegia.

Answer 22

Great anterior segmental medullary artery

Question 23

pathway fro metastasis of cancer

Answer 23

Venous plexuses