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

Chapter 14-15-16: PNS Flashcards

(72 cards)

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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
Identify 1-3 in this picture
1. Median Nerve 2. Radial Nerve 3. Ulnar Nerve
26
Identify 1-3
1. Radial Nerve 2. Median Nerve 3. Ulnar Nerve
27
Identify 1-3
1. Median Nerve 2. Radian Nerve 3. Ulnar Nerve
28
The three cords of the brachial plexus are..
Posterior, Lateral, Medial
29
The median nerve is formed from which section of the anterior rami?
C5-T1
30
The median nerve motor innervates...
Most anterior forearm muscles and Thenar (thumb muscles.
31
The cutaneous innervation of the median nerve is...
Palmar aspects and dorsal tips of lateral 3-1/2 digits (thumb, index finger, middle finger, and 1/2 of ring finger)
32
This is the cutaneous innervation of what nerve...
Median nerve
33
This is the cutaneous innervation of what nerve?
Ulnar Nerve
34
The median nerve is formed by what two cords of the brachial plexus?
Medial and lateral cords of the brachial plexus
35
The ulnar nerve is formed from the \_\_\_1\_\_ cord of the \_\_\_2\_\_ plexus
1. Medial 2. Brachial
36
The ulnar nerve is formed from anterior rami of...
C8-T1
37
The ulnar nerve motor innervates...
Anterior forearm muscles and intrinsic hand muscle
38
The cutaneous innervation of the ulnar nerve is...
Dorsal and plamar aspects of medial 1-1/2 digits (little finger, medial aspect of ring finger)
39
This is the cutaneous innervation of which nerve?
radial
40
The radial nerve is formed from what cord?
Posterior
41
The radial nerve is from from anterior rami...
C5-T1
42
The motor inntervation of the radial nerve is...
Posterior arm muscles (extend forearm) and Posterior forearm muscles (supinate forearm, extend wrist, digits, one muscle that abducts the tumb).
43
In general nerves from the ________ division of the brachial plexus tend to inntervate muscles that flex the parts of the upper limb.
anterior
44
Nerves from the ______ division of the brachial plexus tend to innervate muscles that extend parts of the upper limb
Posterior
45
The cutaneous innervation of the radial nerve:
Posterior region of arm Posterior region of forearm Dorsal aspect of lateral three digits(except their distal tips)
46
The two lower plexuses are...
Lumbar and Sacral
47
identify 1-3
1. Femoral nerve 2. Obturator nerve 3. Sciatic nerve
48
What is unique about L4 nerve?
Shared between the lumbar and sacral plexuses
49
Identify this plexus
Lumbar
50
Identify this plexus
Sacral
51
Identify 1-3
1. Femoral Nerve 2. Obturator Nerve 3. Saphenous Nerve
52
The femoral nerve is formed from anterior rami...
L2-L4
53
The femoral nerve motor innervates the...
Anterior thigh muscles
54
Cutaneous innervation of the femoral nerve is...
* Anterior thigh * Inferomedial thigh * medial side of leg * most medial aspect of foot
55
This is the cutaneous innervation of...
Femoral Nerve
56
The obturator nerve is formed from anterior rami...
L2-L4
57
The obturator nerve motor innervates the...
medial thigh muscles (adductors of thigh)
58
The cutaneous inntervation of the superomedial thigh is through what nerve?
Obturator Nerve
59
This is the cutaneous innervation of what nerve?
Obturator Nerve
60
The lumbar plexus is formed by the anterior rami of...
L1-L4
61
The Sacral plexus is formed by the anterior rami of...
L4-S4
62
Identify the nerves in the picture
1. Tibial Nerve 2. Common Fibular Nerve 3. Sciatic nerve
63
The sciatic nerve branches into two main divisions known as...
Common Fibular Division, Tibial Division
64
The Sciatic Nerve is formed by the anterior rami of...
L4-S3
65
The Tibial Nerve is formed by the anterior rami...
L4-S3
66
The tibia nerve motor innervates the...
* 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
The cutaneous innervation of the tibial nerve:
Branches to heel and via its medial and lateral plantar nerve branches supply **the sole of the foot.**
68
This is the cutaneous innervation of the...
Tibial Nerve (picture really helped this time huh)
69
The common fibular nerve motor innervates the...
* Anterior leg muscles(dorsiflex foot, extend toes) * Dorsum foot muscles(extend toes) * Lateral Leg muscles(foot evertors and plantar flexors)
70
The cutaneous innervation of the common fibular nerve is...
Dorsal interspace between first and second toes Anteroinferior part of leg; most dorsum of foot
71
This picture is the innervation of what nerve?
Common fibular nerve
72
The common fibular nerve is formed from the anterior rami of...
L4-S2

anatomy (8 decks)

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