this images shows the pain pathway starting from the pain receptor to the cerebral cortex
showing:
1. pain stimulus
2. pain receptor
3. C and A nerve fibers
4. dorsal root ganglion
5. dorsal horn cell in spinal cord
6. spinothalamic tract
7. pons
8. medulla
9. midbrain
10. thalamus "VPLN of the thalamus"
11. limbic system
12. cingulate cortex
13. somatosensory cortex
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