E-Book of Articles - World Federation of Music Therapy

Fachner, Jörg: The Musical Time-Space, Cannabis And The Brain ...
THC - listened with closed eyes to three pieces of rock music in a
comfortable armchair. EEG was recorded through rest and music listening
NeuroScience BrainImager (1988)
• 28 Electrodes; 12 Bit A/D
(4096 d/s @ 256µV DR); Notch
Filter; Cut-off: 0.3+40Hz (used)
• Average Maps over 2.5 seconds
– Delta (0.39 -3.9 Hz);
– Theta (4.3-7.8 Hz);
– Alpha (8.2-11.7 Hz);
– Beta I (12.1-16.0 Hz);
– Beta II (16.4-30.0 Hz);
Spectral Map;
– Roll-off (3 dB in 0.25 HZ)
• Individual and Group Averages
Sub-Avg; Standard Deviation
Mapping;
The NeuroScience BrainImager, manufactured 1988, samples 28 EEG traces
with a 12 Bit analogue/digital converter. This offers 4096 dots per second
within a dynamic rate of 256µV. It provides a sample accuracy of 1/16 th µV.
Average maps are processed every 2.5 seconds. Using it for example in an
intensive care unit, the Imager is equipped with an isolation transformer
and shielded pre-amplification, as well as a notch filter on 60 Hz to reduce
electromagnetic fields influences in hostile enviroments.
Impedance levels have been kept under 11 kΩ. Cut-off filters were set to 40
and 0.3 Hz. EOG, ECG or EMG traces for artefact control have not been
administered to avoid labaratory bias. Artefact control was done visually by
a time coded video protocol. After removing potential artefact maps
individual and group averages have been processed using the statistic
software package of the NeuroScience Brainimager.
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