Mod 14: Neuro Sensory Systems

Question 1

Discriminative general senses (DGS) are comprised of

Answer 1

2 point discrimination
Size perception
Texture perception
Stereognosis (form/shape perception)
Conscious perception

Question 2

What is static proprioception

Answer 2

Perception of the body parts in relation to one another

Position sense

Question 3

What is dynamic proprioception

Answer 3

The ability to sense movement and balance

Kinesthetic sense

Question 4

DGS: conscious proprioception has what 2 parts?

Answer 4

Static proprioception and dynamic proprioception

Question 5

What are the 4 main ascending sensory pathways

Answer 5

1. Dorsal column/media lemniscus
2. Anterolateral Spinothalamic
3. Trigeminal/trigeminothalamic
4. Spinocerebellar

Question 6

The sensory axons enter the spinal cord via

Answer 6

Dorsal root ganglion

Question 7

What are the different receptor types of stimulus

HINT: 5 mentioned

Answer 7

1. Mechanoreceptors
2. Thermoreceptors
3. Nociceptors
4. Electromagnetic
5. Chemoreceptors

Question 8

What are neciceptors

Answer 8

Detect pain, damage in tissues

Question 9

The third order neuron travels from _____ to _____

Answer 9

Thalamus; cerebral cortex

Question 10

The 1st order neuron travels from ____ to _____ or _____

Answer 10

Receptor; Spinal cord or brainstem nucleus

Question 11

The 2nd order neuron travels from _____ to _____. It crosses from ____ to ______ side

Answer 11

Nucleus; thalamus

Midline; opposite

Question 12

The dorsal column is comprised of

Answer 12

Fasciculus gracilis and fasciculus cuneatus

Question 13

Fasiciculus gracilis

What does it do/what are its characteristics

Answer 13

Has sensations from lower-half body
Travels more medially in the SC
Ascends to the medulla
Synapses of nucleus gracilis

Question 14

Fasciculus cuneatus

Answer 14

Sensations from the upper body
Travels more laterally in SC
Ascends to medulla
Synapses on nucleus cuneatus

Question 15

In the DC/ML system, the 3rd order neuron goes up to the _____ area of the cortex

Answer 15

Upper 2/3 area, area 3-1-2

Question 16

Loss of tactile sensibility is

Answer 16

Tactile anesthesia

Question 17

Tactile hypoesthesia is

Answer 17

Reduction in tactile sensibility

Question 18

Exaggerated tactile sensibility is

Answer 18

Tactile hyperesthesia

Question 19

What are the 2 pathways in the Anterolateral spinothalamic system

Answer 19

Lateral spinothalamic and Anterior spinothalamic

Question 20

Lateral spinothalamic mediates

Answer 20

Pain and temperature

Question 21

Anterior spinothalamic mediates

Answer 21

Light/crude touch

Question 22

What does “algia” mean

Answer 22

Pain

Question 23

Neuralgia means

Answer 23

Severe pain

Question 24

What are the 3 categories of altered response?

Answer 24

1. Analgesia = no response
2. Hypoalgesia = reduced response
3. Hyperalgesia = increased response

Question 25

What occurs if there is a lesion to the dorsal root or nucleus of termination in the lateral spinothalamic pathway?

Answer 25

Causes ipsilateral impairment in pain/temperature sensations

Question 26

Lesion to lateral spinothalamic pathways (crossed fibers) cause

Answer 26

A contralateral impairment in pain/temperature sensation

Question 27

In the trigeminal system, the 3rd order neuron travels to what area of the cortex

Answer 27

Lower 1/3 of area 3-1-2

Question 28

Effects of lesion to the ganglion or sensory nucleus in the trigeminal pathways causes

Answer 28

Ipsilateral sensory loss

Question 29

Lesion to the anterior pathway causes

Answer 29

Contralateral sensory loss

Question 30

Lesion to the posterior pathway causes

Answer 30

Mild effects on the discriminative general senses

Question 31

The trigeminal system has what 2 pathways

Answer 31

Anterior (ventral) trigeminothalamic (crossed) | Posterior (dorsal) trigeminothalamic (crossed and uncrossed)

Question 32

The spinocerebellar pathways mediate

Answer 32

Unconscious proprioception

Question 33

What are the 4 spinocerebellar pathways

Answer 33

2- dorsal/posterior tracts = dorsal/posterior spinocerebellar and cuneocerebellar 2- ventral/anterior tracts = ventral spinocerebellar and rostral spinocerebellar

Question 34

In the dorsal/posterior tracts the proprioceptive input comes from (what part of the body)?

Answer 34

Lower-half body and limbs

Question 35

The cuneocerebellar tracts have proprioceptive input from

Answer 35

Upper half-body and limbs