Question Bank 6 - Stress & Pain

Question 1

What are the 3 McGill Pain Questionnaires?

Answer 1

1. Sensory-discriminative (throbbing, gnawing, shooting)
2. Motivational-affective (tiring, sickening, fearful)
3. Cognitive (no pain, mild, a lot)

Question 2

Which types of sensory neurons respond to pain?

Answer 2

A delta and C

Question 3

Traits of A delta fibers:

Answer 3

1. Large myelinated axons

2. Register pain quickly

Question 4

Traits of C fibers:

Answer 4

1. Thin unmyelinated axons

2. TRPV1 receptors

Question 5

What is the Gate Control Theory of Pain?

Answer 5

Spinal “gates” or modulation sites that control the signal that goes to the brain. Inhibitory interneurons present in the spinal cord that inhibit neurons that transmit pain sensation.

Question 6

What are opioids?

Answer 6

Endorphins/drugs that inhibit activity of inhibitory neurons in the PAG.

Question 7

Descending pain control pathway starting from PAG.

Answer 7

PAG -> Raphe Magnus -> Spinal interneurons

Question 8

What are involved in the affective processing of pain?

Answer 8

Insula, ACC, PCC, OFC, mPFC

Question 9

What is stress analgesia?

Answer 9

A lessening of pain often occurs under acute stress conditions.