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A215 - block three > spinal nerves > Flashcards

spinal nerves Flashcards

1
Q
  • part of PNS
  • comes directly off the spinal cord
  • 31 pairs (8 cervical, 12 thoracic, 5 lumbar, 5 sacral, 1 coccygeal)
A

description of spinal nerves

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2
Q
  • located in PNS
  • connect to CNS
  • numbered according to CNS
A

spinal and cranial nerve similarities

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3
Q
  • connected to spinal cord (not brain)
  • arabic numbers (1,2,3, etc.)
  • generally longer except CN X: Vagus
A

spinal and cranial nerve differences

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4
Q

axons of sensory neurons

A

posterior root

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5
Q

cell bodies of sensory neurons

A

posterior root ganglion

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6
Q

innervates deep back muscles and skin of back (smaller)

A

posterior primary ramus

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7
Q

axons of motor neurons

A

anterior root

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8
Q

axons of sensory and motor neurons

A

spinal nerve

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9
Q

innervates everything else from the neck inferiorly (larger)

  • also forms nerve plexuses
A

anterior primary ramus

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10
Q

segments of skin innervated by a single spinal nerve; create a sensory map of the body

A

dermatomes

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11
Q

chickenpox virus latent in posterior root ganglion; reactivates along dermatome

A

shingles

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12
Q

organized by function

A

roots

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13
Q

organized by location

A

rami

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14
Q

structure you can see with the naked eye

  • axons wrapped in connective tissue layers (endo-, peri-, epi-, nerium)
A

nerve

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15
Q

a network of converging/diverging axons

  • typically formed from anterior primary rami
  • individual intercostal nerves are the anterior rami of the thoracic spinal nerves
A

nerve plexus

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16
Q
  • anterior rami of C1-C4 spinal nerves
  • contains phrenic nerve
A

cervical plexus

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17
Q
  • skin of neck
  • skin of ear
  • skin of shoulders
A

cervical plexus sensory

18
Q
  • anterior neck muscles
A

cervical plexus motor

19
Q

C3, C4, C5 supplies the diaphragm muscles

A

phrenic nerve

20
Q

anterior rami of C5-T1 spinal nerves

  • primarily innervated upper limb
  • consists of musculocutaneous nerve, axillary nerve, radial nerve, median nerve, and ulnar nerve
A

brachial plexus

21
Q

lateral forearm

A

musculocutaneous nerve sensory

22
Q

most muscles of anterior compartment of arm

  • coracobrachialis
  • biceps brachii
  • brachialis
A

musculocutaneous nerve motor

23
Q

lateral shoulder

A

axillary nerve sensory

24
Q
  • deltoid
  • teres minor
A

axillary nerve motor

25
Q
  • posterior arm
  • hand
  • forearm
A

radial nerve sensory

26
Q
  • muscles of posterior arm
  • muscles of posterior forearm
A

radial nerve motor

27
Q

lateral palm of hand (thumb-side)

A

median nerve sensory

28
Q
  • most anterior forearm muscles
  • hand muscles (thenar muscles, lumbricals (fingers 2-3))
A

median nerve motor

29
Q

compression of median nerve at retinaculum (median nerve damage)

A

carpal tunnel

30
Q

medial hand (pinkie side)

A

ulnar nerve sensory

31
Q
  • anterior forearm (medial 1/2 of flexor digitorum profundus, flexor carpi ulnaris)
  • hand (hypothenar muscles, lumbricals (fingers 4-5), interossei)
A

ulnar nerve motor

32
Q

anterior rami of L1-L4 spinal nerves

  • innervates inferior abdominal wall and part of lower limb

contains femoral nerve and obturator nerve

A

lumbar plexus

33
Q
  • anterior thigh
  • inferomedial thigh
  • medial leg
  • medial foot
A

femoral nerve sensory

34
Q

anterior thigh muscles

A

femoral nerve motor

35
Q

medial thigh

A

obturator nerve sensory

36
Q

medial thigh muscles

A

obturator nerve motor

37
Q

anterior rami of L4-S4 spinal nerves

  • innervates the buttocks, pelvic structures, and majority of lower limb
  • consists of sciatic nerve, tibial nerve, and common fibular nerve
A

sacral plexus

38
Q

splits into tibial nerve and common fibular nerve

A

sciatic nerve

39
Q
  • posterior leg
  • sole of foot
A

tibial nerve sensory

40
Q
  • most posterior thigh muscles
  • posterior leg muscles
  • muscles on sole of foot
A

tibial nerve motor

41
Q
  • anterior leg
  • lateral leg
  • dorsum of foot
A

common fibular nerve sensory

42
Q
  • anterior leg muscles
  • lateral leg muscles
  • muscles on dorsum of foot
A

common fibular nerve motor

A215 - block three (11 decks)

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