spinal cord

Question 1

How do you tell what side of the spinal cord you are looking at?

Answer 1

the anterior side has ONE blood vessel

Question 2

what indicates that you are looking at the posterior cord

Answer 2

there are TWO posterior spinal arteries

Question 3

filum terminale externum

Answer 3

anchors caudal end of dural sac with coxxyx; made up of dura

Question 4

filum terminale interunum

Answer 4

made of pia and glial cells; anchors the caudal end of the spinal cord to the terminal end of the dural sac around the S2 vertebra

Question 5

denticulate ligament

Answer 5

half way between the posterior rootlets and anterior rootlets; it goes in the subarachnoid space

Question 6

artery of adamkiewicz

Answer 6

inferior 2/3 of cord

Question 7

veins of spinal cord

Answer 7

located in the epidural space filled with fatty tissue that contains the venous plexus; may provide a way for prostate cancer to spread to the brain.

Question 8

white matter

Answer 8

is the axon tracts and it carries the projections; its myelinated;

Question 9

gray matter

Answer 9

this is where the cell bodies, dendrites and initial part of the axon are

Question 10

inferior cerebellar peduncle

Answer 10

input from the posterior spinocerebellar tract

Question 11

superior cerebellar peduncle

Answer 11

input from the anterior spinocerebellar tract

Question 12

anteriolateral system

Answer 12

it decussates at the SAME level that the axon enters the spinal cord; it is ALWAYS a CONTRALATERAL lesion

Question 13

ALS carries what info

Answer 13

pain, temperature, crude touch

Question 14

corticospinal tract decussation

Answer 14

medullary pyramids but not all

Question 15

zones of grey matter

Answer 15

posterior, intermediate, anterior

Question 16

substantia gelatinosa locale

Answer 16

in the posterior horn, is significantly lighter than the other areas of the posterior horn

Question 17

substantia gelatinosa’s rexed, function

Answer 17

II; modulates pain

Question 18

medial side of anterior horn grey matter

Answer 18

neurons for proximal and axial muscles

Question 19

cervical level shape

Answer 19

round to oval

Question 20

cervical level GM

Answer 20

becomes larger reflecting sensory input “cervical enlargement” because of brachial plexus
BUNNY EARS

Question 21

cervical level WM

Answer 21

large amount of axons because you info FROM your legs/arms, also info going TO your legs/arms

Question 22

thoracic level GM

Answer 22

has dorsal nucleus of clarke (VII); also has the lateral horn for the PreSy

Question 23

gracile funiculus

Answer 23

only present below T6

Question 24

lumbar region shape

Answer 24

round

Question 25

lumbar GM

Answer 25

large GM anterior and posterior horns. there is a lumbar enlargement

Question 26

lumbar gracile

Answer 26

only contains the leg fibers

Question 27

Sacral shape

Answer 27

round, smaller than lumbar and has the fewest fibers

Question 28

sacral GM

Answer 28

main component

Question 29

patellar spinal reflex

Answer 29

comes in through the posterior funiculus and synapses in two places in the GM; one stimulates a motor neuron for leg extension, the other inhibits a motor neuron for leg flexion

Question 30

muscle weakness indicates what type of lesion

Answer 30

TRICK QUESTION!!! its not a unique feature. It could be upper or lower

Question 31

brown sequard

Answer 31

hemi section of spinal cord

Question 32

B12 deficiency

Answer 32

dorsal columns

Question 33

clarks nucleus

Answer 33

neurons that form the dorsocerebellar tract; T1-L3

Question 34

where are motor neurons for extensors

Answer 34

most ventral part of the ventral horn

Question 35

lamina I

Answer 35

sometimes called tract cells that project to ALS; pain, temp, crude touch; cross in anterior white commisure

Question 36

lamina V

Answer 36

is the other lamina that projects to ALS

Question 37

dorsal root entry zone

Answer 37

modalities are split here; ALS stuff is on the lateral division; the medial division proprioception, touch and pressure neurons are large and medial and the info goes to the posterior columns

Question 38

how many spinocerebellar tracts

Answer 38

4

Question 39

spinocerebellar tract locale

Answer 39

edge of the spinal cord; there are two versions of this, one is dorsal and one is ventral