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Acupuncture--deep pain with an autonomic dimension?
Florian Beissner1, Ralf Deichmann, Christian Henke
1Pain & Autonomics - Integrative Research (PAIR), University Hospital of Psychiatry and Psychotherapy, Jena, Germany.
Neuroimage
|January 10, 2012
Summary
Acupuncture at point Pc6 reduces heart rate by activating specific brainstem and cortical networks. This study clarifies the autonomic mechanisms behind acupuncture
Area of Science:
- Neuroscience
- Autonomic Nervous System
- Integrative Medicine
Background:
- Acupuncture point Pc6 stimulation effectively treats nausea and vomiting.
- Acupuncture is frequently associated with heart rate reduction, but the mechanism is unclear.
Purpose of the Study:
- To investigate the neuronal correlates of sensations and autonomic reactions during acupuncture.
- To elucidate the brainstem and cortical mechanisms underlying acupuncture-induced heart rate changes.
Main Methods:
- Combined brainstem-sensitive functional magnetic resonance imaging (fMRI) with heart rate recording.
- Utilized time-resolved rating of needling sensation to correlate neural activity with subjective experience.
Main Results:
- Needling sensation activated cortical pain-related areas (prefrontal cortex, anterior cingulate cortex) involved in heart rate modulation.
- Brainstem activation included a network (hypothalamus, periaqueductal gray, ventromedial medulla, ventrolateral medulla) responsible for heart rate changes.
Conclusions:
- Acupuncture acts as a unique pain stimulus influencing autonomic responses.
- The identified neural networks provide a mechanistic explanation for acupuncture's non-analgesic effects and therapeutic potential.
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