PNS - Revision Flashcards Preview

Neurology > PNS - Revision > Flashcards

Flashcards in PNS - Revision Deck (27):
1

What is a collection of cell bodies called when in the PNS?

Ganglion

2

What is a multipolar neurone and where can it be found?

2 or more dendrites
ALL motor neurones of skeletal muscles and ANS
Cell body in CNS

3

What is a unipolar neurone and where can it be found?

Double process
Sensory
Cell body in PNS

4

What is a nerve?

A collection of axons surrounded by connective tissue and blood vessels

5

How many spinal nerves are there and how are they arranged?

31:
8 cervical
12 thoracic
5 lumbar
5 sacral
1 coccygeal

6

Where are spinal nerves found?

In the intervertebral foramina

7

What will the posterior rami supply?

Posterior body wall

8

What will the anterior rami supply?

Anterolateral body wall

9

Where will ALL sensory axons pass from?

Spinal nerve into the posterior root then into the posterior rootlets then into the posterior horn of the spinal cord

10

Where will ALL motor axons pass from?

Anterior horn
Anterior rootlets
Anterior root
Spinal nerve

11

What will each spinal nerve pain suppy a body segment with?

General sensory supply to all structures
Somatic motor supply to all skeletal muscle
Sympathetic nerve supply to skin and smooth muscle arterioles

12

What is a dermatome?

An area of skin supplied with sensory innervation from a single spinal nerve

13

What is a myotome?

The skeletal muscles supplied with motor innervation from a single spinal nerve

14

What are common landmark dermatomes?

Nipple; T4
Umbilicus; T10
Thumb; C6
Post scalp, neck and shoulder; C2-4
Upper limb; C5-T1
Lower limb, gluteal and perineum; L2-Co1

15

What is shingles?

Viral disease of the spinal ganglia causing a classic, dermatomally distributed vesicular rash

16

What is a nerve plexus?

Intermingled anterior rami from a number of adjacent spinal nerves

17

What spinal nerves are involved in the cervical plexus?

C1-4

18

What spinal nerves are involved in the brachial plexus?

C5-T1

19

What spinal nerves are involved in the lumbar plexus?

L1-L4

20

What spinal nerves are involved in the sacral plexus?

L5-S4

21

Where does sympathetic outflow originate from?

T1-L2 lateral horns

22

What are the different routes for a sympathetic nerve?

Ascend down symp trunk then synapse
Synapse at level of entry
Descend down symp trunk then synapse
Pass through symp trunk without synapsing to enter abdominopelvic splanchnic nerves

23

Describe symp outflow to the heart

Presynaptic axons synapse in T1 or cervical paravertebral ganglia
Post synaptic axons pass in cardiopulmonary splanchnic nerves to the SA and AV nodes in myocardium

24

Describe symp outflow to lungs

Presynaptic axons synapse in upper thoracic paravertebral ganglia
Postsynaptic axons pass in cardiopulmonary splanchnic nerves to bronchiolar smooth muscle and mucionus glands

25

Describe symp outflow to adrenal medulla

Presynaptic axons pass through aoritocrenal ganglion to synapse directly into adrenal medulla

26

Where will parasymp outflow originate from?

CN 3,7,9,10
Sacral spinal nerves

27

How will parasymp outflow travel around the body?

Ciliary ganglion
Pterygopalatine ganglion
Otic ganglion
Submandibular ganglion
Vagus nerve