The Physiological Basis: From "Qi" to Neurotransmitters
While traditional theory describes acupuncture as a way to balance the flow of Qi (energy) through meridians, modern science explains its effects through the nervous system. When a fine needle is inserted into an acupoint, it stimulates sensory nerves that send signals to the spinal cord and brain.
These signals trigger the release of the body's natural "pharmacy," including:
Endorphins and Enkephalins: Natural opioids that block pain signals in the brain.
Serotonin and Dopamine: Neurotransmitters that improve mood and promote a sense of relaxation.
Adenosine: A molecule released at the local site of the needle that has powerful anti-inflammatory and pain-relieving effects. By 2026, functional MRI (fMRI) scans have proven that acupuncture can "rewire" the brain's pain centers, helping patients with chronic conditions feel less pain over time.