Electroencephalogram--entropy and acupuncture.

Abstract:

:Computer-based measuring of the level of sedation and hypnosis is difficult and has proven to be challenging. The electroencephalogram (EEG) has been proposed as a potential method. Response entropy (RE) and state entropy (SE) are multifactor, dimensionless parameters of a new technology of EEG monitoring, and we investigated them for the first time in acupuncture research within this study. Both parameters have been alleged to reflect changes in the clinical state of sedation. Two different acupuncture schemes were tested in a randomized crossover trial with nine healthy volunteers (mean age +/- sd, 28.8 +/- 3.6 yr; 25-36 yr). Applying and stimulating acupuncture needles or performing laserneedle acupuncture at special sedation points decreased RE and SE significantly (P < or = 0.01; paired t-test) compared with the reference interval before acupuncture. In contrast, acupuncture of points for increasing "Qi-energy" did not decrease parameters of entropy. Specific acupuncture schemes produce specific, reproducible, and quantifiable effects on entropy parameters in the EEG. Therefore, entropy measurements during acupuncture seem to be worthy of further evaluation with a larger series of subjects.

journal_name

Anesth Analg

journal_title

Anesthesia and analgesia

authors

Litscher G

doi

10.1213/01.ane.0000217188.71710.47

subject

Has Abstract

pub_date

2006-06-01 00:00:00

pages

1745-51

issue

6

eissn

0003-2999

issn

1526-7598

pii

102/6/1745

journal_volume

102

pub_type

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