Cranial osteopathic techniques and electroencephalogram (EEG) alpha power: a controlled crossover trial

Area of Science:

• Neuroscience
• Osteopathic Manipulative Medicine
• Physiology

Background:

• The osteopathic tradition in the cranial field (OCF) posits a primary respiratory mechanism (PRM) linked anatomically between the occiput and sacrum.
• Previous research on the occiput-sacrum connection has yielded inconsistent results, with no studies exploring its neurophysiological basis.

Purpose of the Study:

• To investigate the neurophysiological connection between the occiput and sacrum.
• To compare the effects of the sacral technique (ST) and compression of the fourth ventricle (CV4) on brain alpha-band power (AABP).

Main Methods:

• Healthy volunteers were randomized into groups receiving active (CV4, ST) or sham (sCV4, sST) techniques.
• Electroencephalogram (EEG) recorded occipital AABP during resting state, intervention, and post-intervention periods.
• Repeated-measure ANOVA analyzed the interaction between time and treatment (CV4/ST).

Main Results:

• A statistically significant time × treatment interaction effect was observed (F=791.4; p<0.001).
• The CV4 technique led to a significant increase in AABP post-application compared to CV4 and sham CV4 (p<0.001).
• No significant differences in AABP were found during or after ST and sST application compared to the resting state.

Conclusions:

• The sacral technique (ST) does not induce immediate changes in occipital AABP.
• The CV4 technique demonstrated immediate effects on AABP, supporting previous findings.
• Alternative biological mechanisms for the head-sacrum connection in OCF therapy warrant further investigation.