Trigeminal pathway
The trigeminal nerve system (cranial nerve V) responsible for transmitting pain signals from the face, scalp, and meninges to the brain. Becomes sensitised and hyperactivated during cluster headache and migraine attacks. Psilocybin may modulate trigeminal pain pathways via 5-HT2B and 5-HT2C receptor activity — a mechanism distinct from its 5-HT2A-mediated antidepressant effects. This distinction may explain why psilocybin's headache benefits do not correlate with psychedelic intensity.
Full Explanation
The trigeminal pathway is the trigeminal nerve system (cranial nerve V) responsible for transmitting pain signals from the face, scalp, and meninges to the brain. It becomes sensitised and hyperactivated during cluster headache and migraine attacks. Psilocybin may modulate trigeminal pain pathways via 5-HT2B and 5-HT2C receptor activity — a mechanism distinct from its 5-HT2A-mediated antidepressant effects. This distinction may explain why psilocybin's headache benefits do not correlate with psychedelic intensity.
See: Cluster Headaches (/conditions/cluster-headaches).
Why It Matters
The trigeminal pathway explains why psilocybin can help cluster headache through a different mechanism than depression — and why sub-psychedelic doses can still be effective.
Related Terms
Explore More Terms
Psilocybin
A naturally occurring psychedelic compound found in certain mushrooms that produces altered states of consciousness.
Psilocin
The pharmacologically active compound that psilocybin converts to in the body, responsible for psychedelic effects.
Ego Death
A temporary dissolution of the sense of self during a psychedelic experience, often described as profound and transformative.
Set and Setting
The combination of mindset (set) and environment (setting) that shapes a psychedelic experience.
Microdosing
Taking sub-perceptual doses of psilocybin on a regular schedule for subtle cognitive and emotional benefits.
Mycelium
The vegetative part of a fungus, consisting of a network of fine white filaments that eventually produces mushrooms.