Sensory I

Question 1

what does the DC-ML pathway relay from the body into consciousness

Answer 1

driminative touch
stereognosis
flutter-virbratory sense
general propreation

Question 2

stereognosis

Answer 2

knowing solids

Question 3

all sensory info carried from DC-ML pathway enters what

Answer 3

consciousness

Question 4

what is the min distance for 2 point discrimination on finger

Answer 4

5 mm

Question 5

what is the min distance for 2 point discrimination on lower limb

Answer 5

40 mm

Question 6

where is 1st order neuron cell body

Answer 6

dorsal root ganglia

Question 7

where is 2nd order neuron cell body

Answer 7

NG or NC

Question 8

where is 3rd order neuron cell body

Answer 8

ventral posterior lateral nuclei of thalamus

Question 9

FG

Answer 9

ascending tract from lower limbs

Question 10

FC

Answer 10

ascending tract from upper limbs

Question 11

dorsal column contains ____ axons

Answer 11

ascending

Question 12

where is FC present

Answer 12

C1-T6

Question 13

where is FG present

Answer 13

all spindal cord levels

Question 14

what is unique about C1

Answer 14

only has a ventral root (motor fibers(

Question 15

peripheral processes

Answer 15

get sensory information from limbs and trunk

Question 16

how to descending tracts change

Answer 16

get thinner as they descneding

Question 17

how do ascending tracts change

Answer 17

become thicker as they ascending

Question 18

1st order neuron

Answer 18

pseudounipolar neuron that transmits sensory input from periphery to spinal cord

Question 19

peripheral process

Answer 19

transmit sensory input from UL, UT, LL, LT

Question 20

Aalpha/Abeta fibers

Answer 20

heavily myelinated

allow for quick transmission of sensory information

Question 21

Aalpha/Abeta fibers

Answer 21

heavily myelinated

allow for quick transmission of sensory information

Question 22

where do central processes of 1st order neuron enter

Answer 22

dorsal root of spinal cord, ascend in FG or FC

Question 23

where do central processes of 1st order neuron synpase/terminate

Answer 23

with their respective nuclei (NG or NC) in medulla

Question 24

where do axons of 2nd order neuron course

Answer 24

cross midline of caudal meddula

Question 25

medial leminscus

Answer 25

formed from crossed axons of 2nd order neurons | ascend brainstem to thalamus

Question 26

where do 2nd order neruons terminate

Answer 26

VPL nucleus of thalamus

Question 27

where do axons of 3rd order neurons project

Answer 27

to pirmary somatosensory cortex and sensory association cortex

Question 28

primary somatosensory cortex

Answer 28

where we become consiously aware of sensory input

Question 29

sensory association cortex

Answer 29

where we interpret/identify an object based on previous sensory experiences

Question 30

DC-ML exhibits _____ organization of fibers

Answer 30

somatotopic

Question 31

occlusion of one of the posterior spinal a at spinal cord levels results in what

Answer 31

damage of the ipsilateral dorsal column pathways

Question 32

unilateral lesion of the dorsal columns at teh spinal cord level results in waht

Answer 32

loss or impairment of sensory input from teh ipsilateral side of body AT and BELOW level of lesion

Question 33

occlusion of one of the posterior spinal a in the medulla results in

Answer 33

damage of dorsal column pathways and their nuclei | deficits in ipsilateral side

Question 34

lesion damaging NG and NC causes

Answer 34

ipsilateral sensory deficient in entire body

Question 35

occlusion of anterior spinal a in medulla results in

Answer 35

affects medial leminscus | results in loss of proprioception and vibratory sense from body

Question 36

dorsal columns and their nuclei process ensory info from what side of teh body

Answer 36

ipsiliateral

Question 37

the medial leminscus carrys senosry information from ____ side of body

Answer 37

contralateral

Question 38

the medial leminscus carrys senosry information from ____ side of body

Answer 38

contralateral

Question 39

what does verebral a supply

Answer 39

ML in rostral medulla

Question 40

what does basilar a supply

Answer 40

ML in caudal pons

Question 41

what does posterior cerebral a supply

Answer 41

ML in midbrain

Question 42

what do the lenticulostriate a supply

Answer 42

anterior and posterior limbs of internal capsul

Question 43

axons of 3rd order neurons of DC-ML ascend to cortex via what

Answer 43

posterior limb of IC

Question 44

occlusion of lenticulostriate a causes what

Answer 44

sensory deficentins in contralateral side of body

Question 45

what does anterior cerebral a supply

Answer 45

medial surface of frontal and pariteal lobe

Question 46

lesion in medial surface of S-I cortex causes

Answer 46

sensory deficits in contralateral lega nd foot

Question 47

lesion of lateral surface of S-I cortex causes

Answer 47

sensory deficients in contralateral UL and face

Question 48

what does middle cerebral a supply

Answer 48

lateral surface of cerebral hemispher

Question 49

sensory ataxia

Answer 49

sensory incoordination

Question 50

rhomber's sign

Answer 50

difficulty maintaining balance with eyes closed, feet clsoe togheter

Question 51

tables dorsalis

Answer 51

damage to dorsal roots and DCs sensory ataxia rhomberg sign

Question 52

stamp and stick ataxia is caused by

Answer 52

lesion of DC-ML pathways | bilateral FG lesion

Question 53

lesion of DC-ML pathways causes

Answer 53

loss of proprioception at and below lesion

Question 54

bilateral FG lesion casues

Answer 54

loss of proprioception in lower trunk and LL | individual won't be able to tell what their legs are doring

Question 55

acending pathways that carry nonconscious proprioception from body to ipsilateral cerebellum

Answer 55

cunecerebellar tract | dorsal spinocerebral tract