SYNVEST shows measurable 5-HT2A-linked synaptic density changes but WITHOUT clean dose-response correlation to clinical improvement, complicating the neuroplasticity narrative.

SYNVEST researchers will use PET scans (a type of brain imaging that measures biological activity) to look for changes in synaptic density — essentially, how many connection points exist between brain cells — after people take psychedelics. The scans will very likely show real, measurable changes tied to how psychedelics interact with 5-HT2A receptors (specific docking sites on brain cells). But those brain changes won't line up neatly with who feels better or worse, which pokes a hole in the popular idea that 'more brain rewiring equals more healing.'

PET synaptic imaging reliably detects change; correlating it to symptom relief almost never comes out clean. Mechanism is real but not the whole story. Ten more years needed.