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Neuroanatomy 1 > Classifications of the PNS (Quiz 5) > Flashcards

Classifications of the PNS (Quiz 5) Flashcards

1
Q

Are there nerves in the CNS?

A

no

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2
Q

more myelin = ___________ transduction

A

faster

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3
Q

define nerve

A

bundle of axons

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4
Q

What does somatic refer to?

A

-cells of the body
-somatic branch of the NS innervates the body wall
-includes skin, bone, blood, and skeletal muscle

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5
Q

Somatic branches develop from what?

A

ectoderm and mesoderm

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6
Q

What does visceral refer to?

A

-organs, guts, internal membranes/tubes
-tunica media, all organs and related smooth m.

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7
Q

What is viscera formed from?

A

endoderm

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8
Q

Is viscera voluntary or involuntary?

A

involuntary (unconsciously aware)

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9
Q

T/F: all spinal nerves are mixed nerves

A

true

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10
Q

A connective tissue sheath- the _____________ surrounds each nerve. Each bundle of nerve fibers is called a fasciculus and is surrounded by a layer of connective tissue called the _______________. Blood vessels are associated with each fascicle

A

epineurium, perineurium

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11
Q

Individual axons are surrounded by loose connective tissue called the….

A

endoneurium

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12
Q

What does it mean if a nerve is general?

A

-has pathways and receptors
-distributed throughout body
-no specific modality, threshold, or info transmitted

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13
Q

What does it mean if a nerve is special?

A

-receptors and related axons, and pathways are from specific structures

there are 3 types:
1) unique anatomical structures
2) different modalities and detection mechanisms than general nerves
3) developmentally special

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14
Q

What are the 3 classifications of the PNS?

A

1) general or special
2) somatic or visceral
3) afferent or efferent (direction)

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15
Q

What does afferent mean?

A

-going in
-info goes from PNS into CNS
-input goes to brainstem or spinal cord
-sensory info

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16
Q

What does efferent mean?

A

-going out
-info goes from CNS to PNS
-goes from CNS to target tissue
-motor info

17
Q

Both efferent and afferent are used to describe direction of….

A

nerves (bundles of axons in PNS)

18
Q

What is the function of GSA?

A

-all spinal nerves contain GSA
-general sensation on pain, temp, light touch, pressure, vibration, proprioception
-receptors are thermal, nociceptors and mechanoreceptors
-innervates skin

19
Q

What is the function of GVA?

A

-input from visceral/internal organs, glands, or blood vessels
-often pain or reflex info

20
Q

What is the function of GSE?

A

-info comes from large ventral horn neurons
-info goes to skeletal m. in body wall and extremities
-found all throughout spinal cord

21
Q

What is another name for GSE?

A

LMNs

22
Q

What is the function of GVE?

A

-preganglionic neurons that form the ANS
-sympathetic from T1-L4
-parasympathetic from S1-S4 and all CNs
-info goes out to smooth m. tubes or glands

23
Q

What is the function of SVE?

A

-motor innervation to muscles of the pharyngeal arches/ brachial arches (this is developmentally special, info goes to voluntary striated muscles of the larynx and pharynx), muscles of mastication, and facial expression
-anything motor with swallowing, breathing, talking, etc

note: this is visceral bc its the start of GI tube, thats why its not somatic

24
Q

What is the function of SVA?

A

-sensory fibers that develop in association with the GI tract
-carry olfaction and gustation info
-taste via CN VII and IX

25
Q

What is the function of SSA?

A

-special receptors for vision, hearing, and balance
-CN II and VIII
-no spinal nerves are involved here, just CN II and VIII

26
Q

Which nerve classification will feel that the fire is hot?

A

GSA

27
Q

Which nerve classification will have a sensation to urinate?

A

GVA

28
Q

Which nerve classification will move your apple pencil across ipad?

A

GSE

29
Q

Which nerve classification will taste your cup has tea in it?

A

SVA

30
Q

Which nerve classification will swallow your tea?

A

SVE

31
Q

Which nerve classification will detect heartburn or gastric fullness?

A

GVA

32
Q

Which nerve classification will smell a classmates perfume?

A

SVA

33
Q

Which nerve classification will feel a tickle from an ant running up your leg?

A

GSA

34
Q

Which nerve classification allows for chewing a piece of gum?

A

SVE

35
Q

Which nerve classification sees Dr. Attaway walk across the room?

A

SSA

36
Q

Which nerve classification sends a message to increase digestive motility?

A

GVE

37
Q

Which nerve classification has the smooth muscle of arterial walls contract?

A

GVE

38
Q

Which nerve classification allows you to stand to change seat?

A

GSE

Neuroanatomy 1 (22 decks)

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