Sensory Systems

Question 1

The two types of sensory neurons?

Answer 1

large and small

Question 2

Large sensory neurons are part of the ….and small ones are part of the …

Answer 2

dorsal column medial lemniscal tract

anterior lateral spinothalamic system

Question 3

3 Somatosensory neurons

Answer 3

first, second and third order

Question 4

First order neurons are either …. or … neurons and their cell bodies are located outside CNS in ….

Answer 4

large or small

dorsal root ganglia

Question 5

Second order neurons are located in the … or …

Answer 5

spinal cord (spinothalamic tract) or brain stem (dorsal column system)

Question 6

Third order neurons are located in

Answer 6

thalamus

Question 7

Dorsal column is responsible for …

Answer 7

2 point discrimination, vibration, proprioception and fine touch

Question 8

First order neurons in DRG enter the spinal cord via dorsal root and ascend to form … and …

Answer 8

fasciculus gracilis and fasciculus cuneatus

Question 9

Second order neurons in dorsal column tract cross the midline at the …. and …. nuclei for lower body and upper body respectively.

Answer 9

gracile and cuneate

Question 10

Third order neurons in DRG axons project to 1 degree ipisilateral … cortex.

Answer 10

somatosensory

Question 11

Spinothalamic Tracts (Anteriolateral) are responsible for…

Answer 11

pain, temperature and crude touch

Question 12

The first order neurons in the DRG of spinothalamic tract enter spinal cord and ascend ….

Answer 12

ipsilaterally

Question 13

The second order neurons in the dorsal horn of the spinothalamic tract cross to opposite side of the spinal cord to form….

Answer 13

anterior and lateral spinothalamic tract

Question 14

Third order neurons in the …. of the spinothalamic tract project to somatosensory cerebral cortex on the ipsilateral side.

Answer 14

thalamus

Question 15

Hyperalgesia

Answer 15

lowered threshold of peripheral nociceptors

Question 16

Hypalgesia or Analgesia

Answer 16

reduced/relief from pain

Question 17

Allodynia

Answer 17

central pain sensitization; pain response exaggerated from stimuli not normally painful

Question 18

Referred pain of heart?

Answer 18

left arm/jaw

Question 19

Referred pain of gallbladder?

Answer 19

right shoulder

Question 20

Referred pain of pancreas?

Answer 20

center back

Question 21

Referred pain of liver/gallbladder?

Answer 21

abdomen, upper right quadrant

Question 22

Referred pain of spleen/thymus?

Answer 22

upper right shoulder at front/back of neck

Question 23

Primary somatosensory cortex?

Answer 23

parietal lobe

Question 24

Primary hearing cortex?

Answer 24

temporal

Question 25

Primary visual cortex?

Answer 25

occipital lobe

Question 26

Sensory association coretx

Answer 26

many domains

Question 27

Optic chiasm fibers from..

Answer 27

retina decussate

Question 28

Optic tract carries information from ... visual field.

Answer 28

opposite

Question 29

When there is injury in optic nerve what happens?

Answer 29

blind in one eye

Question 30

When there is an injury in optic chiasm what happens?

Answer 30

tunnel vision

Question 31

When there is an injury in the optic track what happens?

Answer 31

cant see on one side

Question 32

When there is an injury in the lateral geniculate body?

Answer 32

cant see on one side

Question 33

When there is an injury in the optic radiation what happens?

Answer 33

entire lose on one side

Question 34

Pituitary tumor symptom?

Answer 34

tunnel vision

Question 35

The reticular system regulates...

Answer 35

arousal and consciousness

Question 36

Clinical associations with the reticular system?

Answer 36

syncope coma stupor