Week 2

Question 1

what is the dorsal median sulcus

Answer 1

the shallow depressionon dorsal midline of spinal cord; runs entire length of spinal cord

Question 2

what is the dorsal median septum

Answer 2

infolding of pia mater that runs almost to gray matter

Question 3

what is located on the ventral spinal cord

Answer 3

ventral median fissure

Question 4

are there axons in gray matter?

Answer 4

yes

Question 5

ratio of gray matter to white matter

Answer 5

varies depending on section of spinal cord

Question 6

what are the 3 areas of gray matter

Answer 6

dorsal gray horn
ventral gray horn
intermediate gray horn

Question 7

dorsal gray horn function

Answer 7

sensory integration area

Question 8

intermediate gray horn lateral part

Answer 8

intermediolateral gray horn

Question 9

what is present in the intermediolateral gray horn

Answer 9

GVE preganglionic LMN

Question 10

where is the region of the intermediolateral gray horn

Answer 10

T1-T4, S1-S3

Question 11

Interneurons for _____ are located in the intermediate gray horn

Answer 11

autonomic NS

Question 12

Ventral gray horn size

Answer 12

larger when numerous LMN going to skeletal muscle (C6-T2, L4-S2)

Question 13

What is located in the ventral gray horn

Answer 13

GSE LMN

Question 14

What are the major areas of the white matter

Answer 14

dorsal funiculus
ventral funiculus
lateral funiculus

Question 15

dorsal funiculus contains

Answer 15

ascending projection neurons

can also have sensory neurons that dont synapse

Question 16

ventral funiculus contains

Answer 16

descending projection neurons (UMN)

Question 17

Lateral funiculus

Answer 17

mixture of ascending and descending projection neurons

Question 18

what is the fasciculus propruis

Answer 18

named portion of white matter; band that surrounds gray matter

Question 19

what is contained in the fasciculus proprius

Answer 19

axons of short interneurons traveling up/down 2 or so cord segments

Question 20

what are the 3 major functions of the spinal cord

Answer 20

1. recieves and integrates sensory information
2. serves as a conduit for information TO and FROM the brain
3. Controls and regulates motor activity (conscious and reflex)

Question 21

Does every spinal cord carry sensory information

Answer 21

yes

Question 22

every spinal nerve is made up of ____

Answer 22

roots (rootlets)

Question 23

roots can be used as landmarks to locate

Answer 23

individual cord segments

Question 24

dorsal rootlets characteristics

Answer 24

afferent, pseudounipolar; cell bodies in dorsal root anglia

Question 25

ventral rootlets characteristics

Answer 25

efferent, all carry GSE; select ones carry GVE; ramus communicans branch off

Question 26

branches of spinal nerves include

Answer 26

dorsal
ventral
communicating (ramus communicans)
meningeal

Question 27

dorsal branches

Answer 27

less to supply so they are smaller

Question 28

communicating are located in what region are preganglionic sympathetic

Answer 28

T1-L4

Question 29

ramus communicans region of postganclionic sympathetic

Answer 29

all

Question 30

meningeal branches

Answer 30

a lot of nociceptors primarily from dura mater; no sensory input from CNS

Question 31

why is there pain felt when there is herniated disk?

Answer 31

mashing on meninges where a lot of nociception receptors located