Somatic Nervous System

Question 1

How many pairs of cranial nerves are there?

Answer 1

31

Question 2

How many cranial nerves are in the cervical region?

Answer 2

8

Question 3

How many cranial nerves are in the thoracic region?

Answer 3

12

Question 4

How many cranial nerves are in the lumbar region?

Answer 4

5

Question 5

How many cranial nerves are in the sacral region?

Answer 5

6

Question 6

What is a dermatome?

Answer 6

Area of skin that is innervated by a single spinal nerve

Question 7

What are encapsulated receptors?

Answer 7

Nerve ending wrapped in glial cells or connective tissue

Question 8

What kind of sensations travel along the Dorsal column pathway?

Answer 8

Conscious sensation > vibration, visceral pain, limb movement, precise touch

Question 9

What kind of sensations travel along the spinothalamic pathway?

Answer 9

Crude/light touch, pressure, tickle, pain, temperature

Question 10

Where is the sensory cortex located?

Answer 10

Post central gyrus

Question 11

How does injured tissue stimulate nociceptors?

Answer 11

Release of prostaglandins, histamine and bradikin

Question 12

What are the characteristics of ‘1st pain’?

Answer 12

Stabbing, sharp, localised pain. Myelinated axons - fast conduction

Question 13

What are the characteristics of ‘2nd pain’?

Answer 13

Dull long lasting pain. Unmyelinated axons, slow conduction

Question 14

What is the spinothalamic route’s role in pain signalling?

Answer 14

Sending somatic pain to cortex

Question 15

What is the spinoreticular route’s role in pain signalling?

Answer 15

Visceral, emotional and behavioural reaction to pain

Question 16

Main characteristics of chronic pain?

Answer 16

No biological purpose, >6 months, difficult to treat

Question 17

Main characteristics of acute pain?

Answer 17

Biological purpose, provoked by injury or disease, treatable