Lecture 7: Spinal Cord

Question 1

What are the three types of pathways that bring information to the brain?

Answer 1

Conscious relay pathways
divergent pathways
Unconscious relay pathways

Question 2

In both the CNS and PNS, the gray matter is responsible for housing what?

Answer 2

Neuron cell bodies

Question 3

In both the CNS and PNS, the white matter is responsible for housing what?

Answer 3

Bundles of Axons

Question 4

______ roots send information to the periphery (motor)

Answer 4

Ventral

Question 5

_______ roots bring information into the spinal cord (sensory)

Answer 5

Dorsal

Question 6

What are the levels of covering of the spinal cord from outside to inside?

Answer 6

Dura mater
arachnoid mater
Pia mater

Question 7

What anchors the spinal cord to the sacrum?

Answer 7

Filum Terminale

Question 8

DCML is responsible for what sensory information?

Answer 8

Discriminative touch and conscious proprioception

Question 9

What are the primary neurons for DCML?

Answer 9

Dorsal Root Ganglion

Question 10

What are the secondary neurons for DCML?

Answer 10

Lower medulla at nucleus gracilis or nucleus cuneatus

Question 11

What are the third order neurons for DCML?

Answer 11

Thalamus at VPL nucleui

Question 12

Where does the DCML cross?

Answer 12

Lower medulla as internal accurate fibers

Question 13

What is the primary sensory cortex responsible for?

Answer 13

discriminates among the size, texture, and shape of objects

Question 14

What is the somatosensory association areas responsible for?

Answer 14

analyzing information from the primary sensory area and the thalamus to provide stereognosis and memory of the tactile and spacial environment

Question 15

If there is a lesion in the cerebrum, midbrain, pons, or upper medulla, what will the effect on discriminative touch and conscious proprioception be?

Answer 15

Contralateral loss

Question 16

If there is a lesion in the lower medulla, what will the effect on discriminative touch and conscious proprioception be?

Answer 16

Ipsilateral loss

Question 17

If there is a lesion in the spinal region, what will the effect on discriminative touch and conscious proprioception be?

Answer 17

Ipsilateral loss

Question 18

If there is a lesion in the peripheral region, what will the effect on discriminative touch and conscious proprioception be?

Answer 18

Ipsilateral loss

Question 19

Spinothalamic tracts are responsible for carrying what sensory information to CNS?

Answer 19

Discriminative pain, temperature, and coarse touch

Question 20

The lateral spinothalamic tracts carry what sensory information?

Answer 20

fast pain, temperature

Question 21

The anterior spinothalamic tracts carry what sensory information?

Answer 21

Crude touch

Question 22

What are the primary neurons for ST tract?

Answer 22

Dorsal Root ganglion

Question 23

What are the Secondary neurons for ST tract?

Answer 23

cell body at the dorsal horn

Question 24

What are the third order neurons for ST tract?

Answer 24

Thalamus (VPL nucleus)

Question 25

Where does the ST tract cross midline?

Answer 25

Within the spinal cord at the same level of entering

Question 26

If there is a lesion in the cerebrum, midbrain, or upper pons what will the effect on discriminative pain, temperature and coarse touch be?

Answer 26

Entirely Contralateral loss

Question 27

If there is a lesion in the lower pons and medulla, what will the effect on discriminative pain, temperature and coarse touch be?

Answer 27

Contralateral body and ipsilateral face

Question 28

If there is a lesion in the spinal region, what will the effect on discriminative pain, temperature and coarse touch be?

Answer 28

contralateral loss one or two levels below the lesion (Lissauer’s marginal zone)

Question 29

If there is a lesion in the peripheral region, what will the effect on discriminative pain, temperature and coarse touch be

Answer 29

Ipsilateral loss

Question 30

Spinocerebellar tracts are responsible for what type of sensory information?

Answer 30

Unconscious proprioception