H4.i Define and describe pain, including:
H4.i.a peripheral nociception and sensitization,
H4.i.b pain sensation conduction and pathways
H4.i.d spinal cord modulation, including an outline of the gate-control theory,
H4.i.e central processing of pain sensation
H4.i.f role and features of descending pathways.
H4.ii Describe the classification (where relevant), distribution and role in pain sensation of:
H4.ii.a opioid receptors,
H4.ii.b NMDA receptors.