140 & 142 Somatosensory 1 and 2

Question 1

Somatic sensation, visceral sensation, and olfaction have _________ axons

Answer 1

long

Question 2

gustation, photoreception, hair cells (special senses) have ________ axons

Answer 2

short

Question 3

tactile mechanoreceptors detect

Answer 3

light touch, heavy touch, vibration

Question 4

detects shapes and surfaces

Answer 4

meissners

Question 5

detects tactile indentations like braile

Answer 5

merkel disks

Question 6

detects stretches

Answer 6

ruffini

Question 7

detects vibrations

Answer 7

pacinian corpurscle

Question 8

are meisner, ruffini, pacinian encapsulated or nonencapsulated

Answer 8

encapsulated Ad myelinated fibers

Question 9

where are meissners primarily found

Answer 9

fingers, palms, ties, soles

Question 10

where are merkels primarily found

Answer 10

lips, genitals, fingers

Question 11

where are pacinian primarily found

Answer 11

hands, feet, genitals

Question 12

sensation coming from below T6 follows what tract

Answer 12

fasciculus gracilis

Question 13

what is the pathway for sensations

Answer 13

sensation, DRG, fasciculus, synapse at lower medulla and cross, VPL Thalamus, synaps, sensorimotor cortex

Question 14

anterior spinocerebellar tract is used for

Answer 14

proprioception, crosses at pons

Question 15

If you have an infarct of an artery supplying spinal cord on left side, how will it affect non conscious proprioception?

Answer 15

reduced muscle spindle and golgi tendon on left, and loss of right leg proprioception of right

Question 16

where do dorsolateral tract fibers synapse

Answer 16

substantia gelatinosa and principal sensory nucleus

Question 17

where do neospinothalamic tract cross

Answer 17

lateral funiculus

Question 18

cold stimulus uses ______, heat uses ______

Answer 18

Ad, C

Question 19

what centers mediate pain

Answer 19

periaqueductal grey matter and locus ceruleus

Question 20

what do enkephalins do

Answer 20

surpress pain

Question 21

injury in spinothalamic tract causes

Answer 21

loss of pain and thermal sensation to contralateral side

Question 22

a lesions to primary somatosensory nucles or a thalamic lesion causes

Answer 22

loss of sensation to contralateral face and body

Question 23

a lesion to lateral pontine or medullary lesion causes

Answer 23

loss of sensation to ipsilateral face and contralateral body

Question 24

medial medullary lesion causes

Answer 24

loss of sensation to contralateral body

Question 25

what is the effect of histamine, substance P, bradykinin, and serotonin on hyperalgesiA

Answer 25

enhance