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anatomy > Chapter 14-15-16: PNS > Flashcards

Chapter 14-15-16: PNS Flashcards

1
Q

PNS function

A

Bring the message into (sensory) and out of (motor) the central nervous system.

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2
Q

PNS location

A

The peripherial nerves come off the spinal cord and brain

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3
Q

What is a nerve?

A

“Nerve” refers to the PNS and is the name given for an organized bundle of axons.

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4
Q

Sensory neurons convey what type of information and in what direction?

A

Sensory neurons convey sensory information to the central nervous system

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5
Q

Motor neurons convey what type of informationa and in what direction

A

Motor neurons convey motor impulses from the central nervous system to the muscles and glands.

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6
Q

Nerves that have axons of both motor and sensory are called?

A

Mixed nerves

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7
Q

The three layers of a nerve are… (from superficial to deep)

A
  • Epineurium
  • Perineurium
  • Endoneurium
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8
Q

There are how many pairs of nerves connected to the spinal cord?

A

31

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9
Q

The majority of nerves in your body are what type?

A

Mixed nerves

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10
Q

Sensory information travels into the spinal cord along the…

A

Posterior Root

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11
Q

Motor information travels out from the spinal cord along the…

A

Anterior Root

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12
Q

The axons of sensory neurons and the cell bodies of interneurons are located within what section of the gray matter within the spinal cord?

A

The axons of sensory neurons and the cell bodies of interneurons are located in the posterior horns

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13
Q

The anterior horns primarily house the cell bodies of…

A

Somatic motor neurons

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14
Q

identify 1-4 in this picture

A
  1. Spinal nerve
  2. Anterior (ventral) Root
  3. Posterior (dorsal) Root Ganglion
  4. Posterior (dorsal) Root
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15
Q

Identify 1-4 in this photo

A
  1. Anterior (Ventral) root
  2. Posterior (Dorsal) root
  3. Posterior Root Ganglion
  4. Spinal Nerves
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16
Q

The four major plexus (plexi??) are…

A
  1. Cervical
  2. Brachial
  3. Lumbar
  4. Sacral
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17
Q

Spinal nerves in certain areas of the spinal cord intertwine to create a network known as a…

A

Plexus

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18
Q

The thoracic spinal nerves are also known as…

A

Intercostal Nerves

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19
Q

C1-C5 form which plexus?

A

Cervical plexus

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20
Q

C6 through T1 form what plexus?

A

Brachial

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21
Q

C5 is unique in that it is apart of..

A

Both plexus (cervical and brachial)

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22
Q

Anterior rami of what nerves form the brachial plexus?

A

C5-T1

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23
Q

The phrenic nerve controls…

A

The diaphragm

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24
Q

Identify 1-3

A
  1. Right phrenic nerve
  2. Left Phrenic nerve
  3. Phrenic Nerve
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25
Q

Identify 1-3 in this picture

A
  1. Median Nerve
  2. Radial Nerve
  3. Ulnar Nerve
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26
Q

Identify 1-3

A
  1. Radial Nerve
  2. Median Nerve
  3. Ulnar Nerve
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27
Q

Identify 1-3

A
  1. Median Nerve
  2. Radian Nerve
  3. Ulnar Nerve
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28
Q

The three cords of the brachial plexus are..

A

Posterior, Lateral, Medial

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29
Q

The median nerve is formed from which section of the anterior rami?

A

C5-T1

30
Q

The median nerve motor innervates…

A

Most anterior forearm muscles and Thenar (thumb muscles.

31
Q

The cutaneous innervation of the median nerve is…

A

Palmar aspects and dorsal tips of lateral 3-1/2 digits (thumb, index finger, middle finger, and 1/2 of ring finger)

32
Q

This is the cutaneous innervation of what nerve…

A

Median nerve

33
Q

This is the cutaneous innervation of what nerve?

A

Ulnar Nerve

34
Q

The median nerve is formed by what two cords of the brachial plexus?

A

Medial and lateral cords of the brachial plexus

35
Q

The ulnar nerve is formed from the ___1__ cord of the ___2__ plexus

A
  1. Medial
  2. Brachial
36
Q

The ulnar nerve is formed from anterior rami of…

A

C8-T1

37
Q

The ulnar nerve motor innervates…

A

Anterior forearm muscles and intrinsic hand muscle

38
Q

The cutaneous innervation of the ulnar nerve is…

A

Dorsal and plamar aspects of medial 1-1/2 digits (little finger, medial aspect of ring finger)

39
Q

This is the cutaneous innervation of which nerve?

A

radial

40
Q

The radial nerve is formed from what cord?

A

Posterior

41
Q

The radial nerve is from from anterior rami…

A

C5-T1

42
Q

The motor inntervation of the radial nerve is…

A

Posterior arm muscles (extend forearm) and Posterior forearm muscles (supinate forearm, extend wrist, digits, one muscle that abducts the tumb).

43
Q

In general nerves from the ________ division of the brachial plexus tend to inntervate muscles that flex the parts of the upper limb.

A

anterior

44
Q

Nerves from the ______ division of the brachial plexus tend to innervate muscles that extend parts of the upper limb

A

Posterior

45
Q

The cutaneous innervation of the radial nerve:

A

Posterior region of arm

Posterior region of forearm

Dorsal aspect of lateral three digits(except their distal tips)

46
Q

The two lower plexuses are…

A

Lumbar and Sacral

47
Q

identify 1-3

A
  1. Femoral nerve
  2. Obturator nerve
  3. Sciatic nerve
48
Q

What is unique about L4 nerve?

A

Shared between the lumbar and sacral plexuses

49
Q

Identify this plexus

A

Lumbar

50
Q

Identify this plexus

A

Sacral

51
Q

Identify 1-3

A
  1. Femoral Nerve
  2. Obturator Nerve
  3. Saphenous Nerve
52
Q

The femoral nerve is formed from anterior rami…

A

L2-L4

53
Q

The femoral nerve motor innervates the…

A

Anterior thigh muscles

54
Q

Cutaneous innervation of the femoral nerve is…

A
  • Anterior thigh
  • Inferomedial thigh
  • medial side of leg
  • most medial aspect of foot
55
Q

This is the cutaneous innervation of…

A

Femoral Nerve

56
Q

The obturator nerve is formed from anterior rami…

A

L2-L4

57
Q

The obturator nerve motor innervates the…

A

medial thigh muscles (adductors of thigh)

58
Q

The cutaneous inntervation of the superomedial thigh is through what nerve?

A

Obturator Nerve

59
Q

This is the cutaneous innervation of what nerve?

A

Obturator Nerve

60
Q

The lumbar plexus is formed by the anterior rami of…

A

L1-L4

61
Q

The Sacral plexus is formed by the anterior rami of…

A

L4-S4

62
Q

Identify the nerves in the picture

A
  1. Tibial Nerve
  2. Common Fibular Nerve
  3. Sciatic nerve
63
Q

The sciatic nerve branches into two main divisions known as…

A

Common Fibular Division, Tibial Division

64
Q

The Sciatic Nerve is formed by the anterior rami of…

A

L4-S3

65
Q

The Tibial Nerve is formed by the anterior rami…

A

L4-S3

66
Q

The tibia nerve motor innervates the…

A
  • Posterior Thigh Muscles (extend thigh and flex leg)
  • Posterior leg muscles (plantar flexors of foot, flexors of knee)
  • Plantar foot muscles (via medial and lateral plantar nerve branches)
67
Q

The cutaneous innervation of the tibial nerve:

A

Branches to heel and via its medial and lateral plantar nerve branches supply the sole of the foot.

68
Q

This is the cutaneous innervation of the…

A

Tibial Nerve (picture really helped this time huh)

69
Q

The common fibular nerve motor innervates the…

A
  • Anterior leg muscles(dorsiflex foot, extend toes)
  • Dorsum foot muscles(extend toes)
  • Lateral Leg muscles(foot evertors and plantar flexors)
70
Q

The cutaneous innervation of the common fibular nerve is…

A

Dorsal interspace between first and second toes

Anteroinferior part of leg; most dorsum of foot

71
Q

This picture is the innervation of what nerve?

A

Common fibular nerve

72
Q

The common fibular nerve is formed from the anterior rami of…

A

L4-S2

anatomy (8 decks)

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