From: Morphine modulation of pain processing in medial and lateral pain pathways
 | ACC | MD | SI | VPL |
---|---|---|---|---|
Total number of neurons | 42 | 61 | 62 | 53 |
Excitatory | 20 (47.6%) | 27 (44.3%) | 48 (77.4%) | 50 (94%) |
Inhibitory | 1 (2.4%) | 2 (3.3%) | 3 (4.8%) | 0 |
Sum | 21 (50%) | 29 (47.5%) | 51 (82.3%) | 50 (94%) |