Anatomy of PNS

Question 1

What type of neurone is usually multipolar and where is the cell body found?

Answer 1

Motor

CNS

Question 2

What type of neurone is usually unipolar (or pseudounipolar) and where is the cell body found?

Answer 2

Sensory

PNS

Question 3

What is the equivalent of a nerve in the CNS?

Answer 3

A tract

Question 4

Are tracts usually single or multi modality?

Answer 4

Single

Question 5

What type of fibres do spinal nerves carry?

Answer 5

Visceral afferent
Somatic afferent
Somatic motor
Sympathetic efferent

Question 6

What are the dermatomes of the nipple and the umbilicus?

Answer 6

T4

T10

Question 7

What nerve levels make up the cervical, brachial, lumbar and sacral plexuses?

Answer 7

Cervical - C1-4
Brachial - C5-T1
Lumbar - L1-L4
Sacral - L5-S4

Question 8

Describe the sympathetic outflow from the spinal cord to the heart and lungs.

Answer 8

Paravertebral ganglia -> cardiopulmonary splanchnic nerves -> heart and lungs

Question 9

Describe the sympathetic outflow from the spinal cord to the abdominopelvic organs.

Answer 9

Prevertebral ganglia (coeliac, mesenteric etc) -> run on arteries -> abdominopelvic organs

Question 10

What is parasympathetically supplied by the ciliary ganglion?

Answer 10

Eye

Question 11

What is supplied by the parasympathetic ganglia in the head?

Answer 11

Lacrimal and salivary glands

Question 12

Where does the parasympathetic supply to the hindgut, pelvis and perineum come from?

Answer 12

Sacral spinal nerves