For decades, sceptics dismissed acupuncture as placebo because no one understood the mechanism. That position has become increasingly difficult to maintain as functional MRI studies, PET scans, and neurochemical research have revealed specific, measurable changes in brain activity and neurochemistry following acupuncture treatment — changes that correlate with symptom improvement.
What the Latest Evidence Shows
What Brain Scans Show During Acupuncture — The Neurological Evidence for a Real Physiological Effect
Functional MRI (fMRI) is a neuroimaging technique that measures changes in blood flow to different brain regions, providing real-time mapping of which areas activate in response to stimuli. When researchers scan people’s brains during and after acupuncture, specific patterns emerge: deactivation of regions associated with pain processing (the default mode network), activation of parasympathetic (rest-and-digest) regions, and synchronised activation across multiple brain networks involved in pain modulation and emotional regulation.
These findings are not merely academic — they reveal the neurobiological mechanism by which acupuncture reduces pain. Needle insertion at acupoints stimulates sensory nerves, triggering a cascade of neurochemical changes: local neuropeptide release at the site of needle insertion, ascending activation of pain-suppressing pathways in the spinal cord and brainstem, and ultimately altered activity in the brain regions that process and perceive pain. Classical Chinese Medicine describes this as “moving Qi” — modern neuroscience describes it as modulating neural activity and neurotransmitter release.
What makes this evidence particularly compelling is its consistency across different imaging modalities, research teams, and patient populations. fMRI, PET imaging, and functional connectivity studies all paint a similar picture: acupuncture produces measurable, reproducible changes in brain activity that correlate with both treatment and symptom improvement. This is the opposite of what would be expected if acupuncture were merely placebo.
Key Research Findings
What Does the Research Show?
Do’s and Don’ts
- Understand acupuncture works through measurable neurobiological mechanisms
- Expect effects to develop over multiple sessions as neural pathways adapt
- Notice improvements in stress markers (sleep, digestion, mood) alongside pain
- Use acupuncture for conditions affecting nervous system balance
- Discuss mechanism of action with practitioners who understand neuroscience
- Dismiss acupuncture as “just placebo” given neuroimaging evidence
- Expect effects to occur exclusively at the needle site (brain changes are widespread)
- Assume sham acupuncture produces identical neurochemical effects
- Expect immediate brain changes without also expecting time for symptom improvement
- Use acupuncture without understanding it is modifying nervous system function
Frequently Asked Questions
How does acupuncture change the brain?
Is acupuncture’s brain effect placebo?
How long does the brain effect of acupuncture last?
Available at both our Belmont (Perth) & Geraldton clinics — led by Dr. Yang and Dr. Yang Sr., a father-and-son team whose family lineage in classical Chinese medicine spans multiple generations.