E-Book of Articles - World Federation of Music Therapy

Pre-THC-Gavg
Fachner, Jörg: The Musical Time-Space, Cannabis And The Brain ...
Music Alpha Changes
N=4; 30µV Scale; DR 256µV;
Post-THC-Gavg
Here we see the pre/post α-GAs of listening to music. An increase of
relative α-percentage in parietal regions was observed in the post-THC-
Music Group Average for all four subjects. Compared to the pre-THC-music
EEG the individual increase of amplitudes ranged from 2 – 4 µV. Alpha
amplitude changes remind on 'reverse Alpha' findings in studies with gifted
individuals. Jausovic associated higher α-scores with a more efficient
information processing strategy, less mental workload and flow (Jausovec,
1997a; Jausovec, 1997b; Jausovec, 1998).
Due to the fact that we look at an average of four persons we can see the
different individual α-gestalts here. Intra-individual stability of the whole
EEG-Gestalt in rest and activation replicated findings on personality and
situational sensitivity of the EEG. The α-focus in parietal regions showed
individual topographic shapes of receptive activity and the α-Range even
indicated changes on higher and lower frequency ranges, Mapping of α-
standard deviance showed highest deviance in the parietal regions.
A decrease of α-Amplitudes in post-THC-Rest and an increase in the post-
THC-Music EEG has been observed with all subjects, as well as a decrease of
percentage and power on the other frequency ranges
94