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Neuro midterm 2 (mods 8-14) > Mod 14: Neuro Sensory Systems > Flashcards

Mod 14: Neuro Sensory Systems Flashcards

1
Q

Discriminative general senses (DGS) are comprised of

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

What is static proprioception

A

Perception of the body parts in relation to one another

Position sense

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3
Q

What is dynamic proprioception

A

The ability to sense movement and balance

Kinesthetic sense

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4
Q

DGS: conscious proprioception has what 2 parts?

A

Static proprioception and dynamic proprioception

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5
Q

What are the 4 main ascending sensory pathways

A
  1. Dorsal column/media lemniscus
  2. Anterolateral Spinothalamic
  3. Trigeminal/trigeminothalamic
  4. Spinocerebellar
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6
Q

The sensory axons enter the spinal cord via

A

Dorsal root ganglion

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7
Q

What are the different receptor types of stimulus

HINT: 5 mentioned

A
  1. Mechanoreceptors
  2. Thermoreceptors
  3. Nociceptors
  4. Electromagnetic
  5. Chemoreceptors
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8
Q

What are neciceptors

A

Detect pain, damage in tissues

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9
Q

The third order neuron travels from _____ to _____

A

Thalamus; cerebral cortex

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10
Q

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

A

Receptor; Spinal cord or brainstem nucleus

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11
Q

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

A

Nucleus; thalamus

Midline; opposite

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12
Q

The dorsal column is comprised of

A

Fasciculus gracilis and fasciculus cuneatus

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13
Q

Fasiciculus gracilis

What does it do/what are its characteristics

A

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

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14
Q

Fasciculus cuneatus

A

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

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15
Q

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

A

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

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16
Q

Loss of tactile sensibility is

A

Tactile anesthesia

17
Q

Tactile hypoesthesia is

A

Reduction in tactile sensibility

18
Q

Exaggerated tactile sensibility is

A

Tactile hyperesthesia

19
Q

What are the 2 pathways in the Anterolateral spinothalamic system

A

Lateral spinothalamic and Anterior spinothalamic

20
Q

Lateral spinothalamic mediates

A

Pain and temperature

21
Q

Anterior spinothalamic mediates

A

Light/crude touch

22
Q

What does “algia” mean

A

Pain

23
Q

Neuralgia means

A

Severe pain

24
Q

What are the 3 categories of altered response?

A
  1. Analgesia = no response
  2. Hypoalgesia = reduced response
  3. Hyperalgesia = increased response
25
Q

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

A

Causes ipsilateral impairment in pain/temperature sensations

26
Q

Lesion to lateral spinothalamic pathways (crossed fibers) cause

A

A contralateral impairment in pain/temperature sensation

27
Q

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

A

Lower 1/3 of area 3-1-2

28
Q

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

A

Ipsilateral sensory loss

29
Q

Lesion to the anterior pathway causes

A

Contralateral sensory loss

30
Q

Lesion to the posterior pathway causes

A

Mild effects on the discriminative general senses

31
Q

The trigeminal system has what 2 pathways

A

Anterior (ventral) trigeminothalamic (crossed)

Posterior (dorsal) trigeminothalamic (crossed and uncrossed)

32
Q

The spinocerebellar pathways mediate

A

Unconscious proprioception

33
Q

What are the 4 spinocerebellar pathways

A

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

34
Q

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

A

Lower-half body and limbs

35
Q

The cuneocerebellar tracts have proprioceptive input from

A

Upper half-body and limbs

Neuro midterm 2 (mods 8-14) (7 decks)

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