Ch. 15

Question 1

CNS communicates tracts

Answer 1

ascending or descending

Question 2

ascending tracts go

Answer 2

inferior to superior/ brain

Question 3

descending tracts carry info

Answer 3

brain to spinal cord or superior to inferior

Question 4

sensory ascending tracts involve neurons #

Answer 4

3

Question 5

first order neuron sensory ascending tracts

Answer 5

convey info about stimulus to environments

Question 6

first order neuron enter through

Answer 6

dorsal root of spinal cord

Question 7

cell body first order neuron is

Answer 7

clustered with others

Question 8

first order synapses on cell body to be

Answer 8

second order neuron

Question 9

second order neuron specialty

Answer 9

crosses over to opposite side of body aka deccesation

Question 10

second order neuron goes into brain to synapses again to be

Answer 10

third order neuron

Question 11

left foot will be processed

Answer 11

right side brain

Question 12

sensory modality arrangment

Answer 12

pain are with pain, fine touch with fine touch

Question 13

somatotopic arrangement

Answer 13

fine touch neurons lower limb are in certain tract, upper limb different tract

Question 14

medial lateral rule

Answer 14

inferior are arranged medially while neurons are superior will be more laterally

Question 15

posterior columns located

Answer 15

posterior columns in white matter

Question 16

posterior columns convey

Answer 16

limb position, fine touch, pressure, vibration

Question 17

posterior column 1st neuron

Answer 17

starts at receptor then conveys info into posterior column into medulla oblongata to then synapse

Question 18

posterior column 2nd neuron

Answer 18

medulla oblongata decussate and ascend to thalamus

Question 19

posterior column 3rd neuron

Answer 19

convey info to primary somatosensory cortex

Question 20

anterior spinothalamic tract carries

Answer 20

info about crude touch and pressure

Question 21

anterior spinothalamic tract first order neurons

Answer 21

receptor pass up to spinal cord and terminates

Question 22

anterior spinothalamic tract second order neurons

Answer 22

located in dorsal horn gray mater, decussate to other side and ascend to thalamus

Question 23

anterior spinothalamic tract 3rd order

Answer 23

synapse again and goes to primary somatosensory cortex

Question 24

lateral spinothalamic tracts located

Answer 24

lateral white column spinal cord

Question 25

lateral spinothalamic tracts carry info on

Answer 25

pain and temp

Question 26

lateral spinothalamic tracts 1st order

Answer 26

start at receptor up to spinal cord and synapse at entry

Question 27

lateral spinothalamic tracts 2nd order

Answer 27

decussate and ascend to thalamus

Question 28

lateral spinothalamic tracts third order

Answer 28

start thalamus and go to primary somatosensory cortex

Question 29

spinocerebellar tracts carry info about

Answer 29

proprioception (unaware)

Question 30

spinocerebellar tracts first order

Answer 30

receptor to spinal cord to stop

Question 31

second order neurons first type

Answer 31

decussate immediately to the brain to decussate again to end in same place

Question 32

second order neuron second type

Answer 32

doesn't decussate up to cerebellum

Question 33

motor descending tracts conduct

Answer 33

efferent impulses from brain to spinal cord

Question 34

how many motor neurons in a pathway

Answer 34

at least 2

Question 35

spinal cord main tracts

Answer 35

anterior and lateral corticospinal tract

Question 36

upper motor neurons originate in

Answer 36

primary motor cortex

Question 37

% of axons decussate in pyramids and enter lateral corticospinal tract on contralateral side

Answer 37

85

Question 38

% of axons enter anterior corticospinal tract on ipsilateral side and decussate at targeted segment

Answer 38

15

Question 39

subconscious motor pathways help control

Answer 39

neck, trunk, and limbs

Question 40

ALS means

Answer 40

amyotrophic lateral sclerosis

Question 41

ALS is progressing

Answer 41

rapidly

Question 42

ALS affects control of

Answer 42

motor

Question 43

ALS more common in

Answer 43

males

Question 44

symptoms of ALS after age

Answer 44

40