Proceedings of the 9th Conference on Interdisciplinary Musicology – CIM14. Berlin, Germany 2014 first group it increases, and for the second decreases. Experimental group did not fall asleep but maintained a relaxation state after the stimulus, while control group achieved unconscious relaxation but the effects did not hold. The STAI “State” indicated that stress increased after the stimulus for control group (see graph A1.2). 14. CONCLUSIONS • Delta (20-200) and theta (20-100) brainwaves are the ones that have greater amplitude (microvolts) in both groups. Results are clearly shown in graphs A1.5 and A1.10. Graph A1.5 Theta Graph A1.10 Delta • Higher frequency EEG waves such as beta waves have less amplitude. This happens because they are not synchronized and have more phase differences in both groups. • An increased alpha parameter is higher in the experimental group, which indicates that they achieved conscious relaxation. In contrast, the control group showed higher delta waves and presented signs of deep sleep during the experiment. Control group also possibly reached REM (Rapid Eye Movement) sleep halfway throughout the stimulus due theta waves presence in the EEG. • Beta waves are higher in the control group from s = 507 to s = 624 because of unexpected sounds in the stimulus (traffic noise appeared in the original recording). • Both stimuli induced relaxation, but it is important to point out that a person can relax without falling asleep. In this way the binaural stimulus worked better. • It is likely that the control group fell asleep with the nature sounds stimuli because lack of stimulation. • Contrary to what we expected, theta binaural waves didn’t induced FFR in experimental group, although they helped to achieve conscious relaxation. • Delta waves were higher in the experimental group during post-experiment measurements. This suggests that relaxation states were maintained with the absence of stimulus. • Presence of Alpha waves was reduced during deep sleep. This evidence is supported by the control group’s Delta values. • In the absence of stimuli, Delta wave values of the control group decreased, which means that relaxation effects did not prevail. • The effectiveness of an anxiolytic may be measured through the relaxation degree during stimulus and whether its effect endured or not. • For further evaluation of coherence [17] between brainwaves in both hemispheres and the ERP, the use of a 10-20 EEG system is recommended. • Post-experimental STAI “State” tests results are lower in the experimental group. This means that Theta binaural waves were a better anxiolytic than the stimuli (nature sounds) used in the control group. REFERENCES [1] Huang, T., & Charyton, C. (2008). A Comprehensive Review of The Psychological Effects of Brainwave Entrainment. Alternative Therapies in Health and Medicine, 14(5). [2] Berger H. (1929) Über Das Elektrenkephalogramm Des Menschen. Arch Psychiatrie Nervenkrankheiten. [3] Chatrian GE, Petersen MC, Lazarte JA. (1960) Responses to clicks from the human brain: some depth electrographic observations. Electroenceph. Clin. Neurophysiol.. [4] Ulam, Frederick A. (1991) An Investigation of the effects of binaural beat frequencies on human brain waves. California School Of Professional Psychology. [5] Notimex. (2013, July 02). México, país con más estrés laboral. El Universal. Retrieved from: http://www.eluniversal.com.mx/ciencia/2013/mexico-pais-mas-estres-laboral-78744.html [6] American Psychological Association (n.d.). Stress: The different kinds of stress. Retrieved from: http://www.apa.org/helpcenter/stress-kinds.aspx [7] R. Padmanabhan, A. J. Hildreth and D. Laws. (2005) A prospective, randomised, experimentalled study examining binaural beat audio and pre-operative anxiety in patients undergoing general anaesthesia for day case surgery. Anaesthesia. 60, 769-773. [8] Loy, Gareth. (2006) Musimathics. London, England: MIT Press. [9] Atwater, F. Holmes. (2009) Frequency Following Response Study. The Monroe Institute. [10] Ferraro, Fernando M., Acuña, Marcelo. (n.d.) Formación Reticular y Fibras de Asociación del Experimental Encefálico. Departamento de anatomia facultad de medicina, UBA. [11]Le Scouarnec, R. P., Poirier, R. M. Owens, J. E., Gauthier, J., Taylor, A. G. and Foresman, P. A. (2001) Use of Binaural beat tapes for treatment on anxiety: a pilot study of tape preference and outcomes. Alternative Therapies in Health and Medicine. [12] Díaz, M. A., & Comeche, M. I. (2004). Beneficios de la relajación. Retrived from: http://www.psicologiadelasalud.es/beneficios_de_la_relajacion.html [13] Gómez García, J. (2003). Efectos de la música trance percusiva y la música trance electrónica en el EEG. Tesis Licenciatura. Psicología. Departamento de Psicología, Escuela de Ciencias Sociales, Universidad de las Américas Puebla. Retrieved from:
This unique session works the opposite to most sessions. It attempts to to ‘dis-entrain’ the brain, breaking stuck thinking patterns and allowing a fresh way of thinking. The recording contains random and chaotic isochronic tones spanning 7.83 to 18 Hz, played over a background of gamma-embedded noise. Use this session to sit back and allow fresh ideas and new connections to form. Finishes at the illuminating14Hz sensorimotor rhythm frequency.
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