Topographic EEG Changes Accompanying Cannabis-Induced Alteration of Music Perception– Cannabis as a Hearing Aid? Jörg Fachner ABSTRACT. An explorative study on cannabis and music perception is presented, conducted in a qualitative and quantitative way in a habitu- ated setting. EEG-brainmapping data (4 subjects; rest–pre/post listening; 28 EEG traces; smoked cannabis containing 20 mg delta-9-THC with to- bacco) were averaged and analyzed with a T-Test and a visual topo- graphic schedule. Compared to pre-THC-rest and pre-THC-music, the post-THC-music EEG showed a rise of alpha percentage and power in parietal cortex on four subjects, while other frequencies decreased in power. Comparing pre/post music EEGs, differences (p < 0.025) were also found in the right fronto-temporal cortex on theta, and on alpha in left occipital cortex. Results represent an inter-individual constant EEG correlate of altered music perception, hyperfocusing on the musical time-space and cannabis-induced changes on perception of musical acoustics. Cannabis might be of help for hearing impaired persons. [Ar- ticle copies available for a fee from The Haworth Document Delivery Service: 1-800-HAWORTH. E-mail address: <
[email protected]> Website: <http://www.HaworthPress.com> 2002 by The Haworth Press, Inc. All rights reserved.] Jörg Fachner, MD, MEd, is affiliated with the Qualitative Research in Medicine, and the Institute of Music Therapy at the Faculty for Medicine of University Witten/Herdecke, 58448 Witten, Germany. Address correspondence to: Dr. Jörg Fachner, Institute of Music Therapy, Univer- sity Witten/Herdecke, Alfred-Herrhausen-Str. 50, D-58448 Witten, Germany (E-mail:
[email protected]).