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Flashcards in PNS Anatomy Deck (37)
1

Are cranial nerves in the CNS or PNS?

PNS

2

Are unipolar or multipolar neurones most commonly associated with movement?

Multipolar

3

What part of the spinal cord marks the division between upper and lower motor neurones?

Anterior horn of the spinal cord

4

Are spinal nerves of all the same modality or mixed nerves?

Mixed

5

Do spinal nerves supply the viscera or the soma?

Soma

6

Where exactly do spinal nerves lie?

Within the intervertebral foramina

7

What do spinal nerves connect with once they leave the intervertebral foramina?

Rami (and then the structures of the soma)

8

What connects the spinal nerves to the spinal cord segment of the same number?

Roots and rootlets

9

Which type of axons (sensory or motor) pass from the spinal nerve into the posterior root then into posterior rootlets and then into the posterior horn of the spinal cord?

Sensory

10

What type of axons (sensory or motor) pass from the anterior horn of the spinal cord into the anterior rootlets and then into the anterior root then into the spinal nerve?

Motor

11

In which root (anterior or posterior) would you find a ganglion?

Posterior

12

Within what spinal nerve segment is the male nipple located?

T4

13

Within what spinal nerve segment is the umbilicus located?

T10

14

What is a nerve plexus?

A network of intertwined anterior rami

15

What makes up the cervical plexus?

C1 - C4 anterior rami

16

What makes up the brachial plexus?

C5 - T1 anterior rami

17

What does the cervical plexus innervate?

Posterior scalp, neck wall and diaphragm

18

What does the brachial plexus innervate?

Upper limb

19

What makes up the lumbar plexus?

L1 - L4 anterior rami

20

What does the lumbar plexus supply?

Lower limb

21

What makes up the sacral plexus?

L5 - S4 anterior rami

22

What does the sacral plexus supply?

Lower limb, gluteal region and perineum

23

What is a dermatome?

The area of skin supplied by both the anterior and posterior ramus of that spinal nerve

24

What is a myotome?

The skeletal muscles supplied with motor innervation by both anterior and posterior ramus of that spinal nerve.

25

Where do sympathetic nerves exit the spinal cord?

T1 - L2

26

What segments of the spinal cord have lateral horns?

T1 - L2

27

What is the lateral horn for in the spinal cord?

For cell bodies of sympathetic neurones

28

Where do the presynaptic axons giving sympathetic innervation to the heart synapse?

T1 (cervical paravertebral ganglia)

29

How do postsynaptic axons get to the heart?

Pass in cardiopulmonary splanchnic nerves

30

Where do the presynaptic axons giving sympathetic innervation to the lungs synapse?

upper thoracic paravertebral ganglia

31

How do postsynaptic axons get to the lungs?

Pass in cardiopulmonary splanchnic nerves

32

Where do the presynaptic axons giving sympathetic innervation to the foregut synapse?

celiac ganglion of celiac plexus

33

Where do the presynaptic axons giving sympathetic innervation to the kidney synapse?

aorticorenal ganglion

34

Where do the presynaptic axons giving sympathetic innervation to the midgut synapse?

superior mesenteric ganglion of SM plexus

35

Where do the presynaptic axons giving sympathetic innervation to the hindgut synapse?

Inferior mesenteric ganglion of IF plexus

36

Where do presynaptic axons going to supply the adrenal medulla synapse?

On the adrenaline secreting cells of the adrenal medulla

37

How do all presynaptic parasympathetic axons leave the CNS

Cranial nerves III, VII, IX & X
Sacral spinal nerves
(Craniosacral outflow)