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HSF I > Neurocircuits-fibers > Flashcards

Neurocircuits-fibers Flashcards

1
Q

1a fibers

A
  • innervate nuclear bag and chain fibers of muscle spindles via annulospiral endings
  • info: muscle length and rate of change of muscle length
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2
Q

II fibers

A
  • innervate static bag and chain fibers of muscle spindles via flower spray endings. Both muscle sensory and fine tactile (epicritic) fibers.
  • info: muscle length
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3
Q

1b fibers

A
  • innervate Golgi tendon organs

- info: muscle tension

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4
Q

A-beta fibers

A
  • innervate tactile receptors (Meissner, Merkel, Pacinian, Ruffini, hair)
  • info: fine touch and vibratory
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5
Q

A-delta fibers

A
  • slow, small, and lightly myelinated. terminate as free nerve endings
  • info: sharp pain and cold sensation. Visceral and joint receptors, preganglionic fibers (B type)
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6
Q

C fibers

A
  • slow, small, unmyelinated. terminate as free nerve endings
  • info: dull pain and warmth. Some visceral receptors, post ganglion is fibers, itch receptors.
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7
Q

A-gamma fibers

A
  • from gamma motor neurons

- adjust sensitivity of muscle spindles

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8
Q

A-alpha fibers

A
  • from alpha motor neurons

- control muscle contraction

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9
Q

Medial division fibers

Which, info, and projections

A

1a, 1b, II, A-beta

Info: epicritic info of proprioception, fine touch, and vibratory sense. Also participate in reflex circuits

Projections: dorsal column (FG, FC) and laminar III-IX of SC

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10
Q

Lateral Division Fibers

Which, info, and projections

A
  • A-delta and C
  • info: protopathic info of pain and temp
  • projections: laminae I, II, and V. Can be part of Lissauer’s tract
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11
Q

Merkel cell

A

Pressure, texture

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12
Q

Ruffini corpuscle

A

Skin stretch

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13
Q

Meissner corpuscle

A

Stroking, fluttering

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14
Q

Pacinian corpuscle

A

Vibration

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15
Q

Hair receptors

A

Light stroking

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16
Q

Joint receptors

A

Joint capsule stretch

17
Q

C2 innervates _____

A

Back of the head

Is innervated by __?

18
Q

C6 innervates _____

A

Thumb and lateral forearm

Innervated by __?

19
Q

C7 innervates ___

A

Middle finger

Is innervated by __?

20
Q

C8 innervates ___

A

Little finger

Is innervated by __?

21
Q

T4 or T5 innervates ___

A

Nipple

Is innervated by __?

22
Q

T10 innervates ___

A

Umbilicus

Is innervated by ___?

23
Q

L1 innervates ___

A

Inguinal ligament

Is innervated by __?

24
Q

L5 innervates ___

A

Big toe

Is innervated by __?

25
Q

S1 innervates ___

A

Small toe, lateral foot, and heel

Is innervated by __?

26
Q

S4-S5 innervates ___

A

Perianal region

Is innervated by __?

HSF I (4 decks)

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