| Anatomical Characteristics |
| Primary Afferents |
| C fibers |
| Aδ fibers |
| Aβ fibers |
| Neurons |
| Nociception specific (NS) |
| Wide-range (WDR) |
| Laminae levels |
| Superficial I-III |
| Deep IV-VI |
| Cortical projections |
| Anterior cingulate cortex (ACC) |
| Somatosensory cortex |
| Prefrontal cortex |
| Thalamus |
| Insula |
|