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Research on Light and Sound Machines
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Light and sound machines use audio-visual stimulation (AVS), a therapeutic intervention that utilizes flashing lights and pulsing tones at
different frequencies to influence brainwave activity. AVS works with brainwave patterns that are observable through electroencephalograph
(EEG) instruments, which record and measure the firing of neurons. Brainwave patterns are commonly grouped into four different categories: beta,
alpha, theta and delta, all of which are associated
with various states of mind. Because of the entrainment action that AVS has on the brain, it is sometimes called audio-visual entrainment.
Brainwave entrainment, also known as brainwave synchronization, has many historical and social manifestations. Shamanic drum circles, chanting,
and staring at a fire were all ways that our ancestors partook in the phenomenon. Many people engage in these practices today to replicate this
experience.
In the 1960s, anesthesiologist Max Sadove used photic stimulation, a type of brainwave entrainment, to reduce the amount of anesthesia needed
for surgery. Around the same period, Bernard Margolis published an article on how brainwave entrainment was beneficial during dental
procedures, noting that patients required less anesthesia.
In the 1980s, researchers like Norman Shealy and Glen Solomon investigated entrainment for headache relief, serotonin release, and general
relaxation. In 1981, Michael Hutchison wrote his landmark book MegaBrain, outlining the numerous uses of entrainment from meditation
to super-learning.
Studies continued into the 1990s when researchers like Harold Russell and John L. Carter explored using entrainment with attention disorders
and learning disabilities. Similar research was conducted by other scientists examining AVS as an intervention for depression,
premenstrual syndrome (PMS), chronic pain, and ADHD.
In 1989, a study by Norman Sheely showed that 30 minutes of white light with audio-visual entrainment increased serotonin by 23% and
norepinephrine by 18%, making it beneficial for the treatment of depression.
In 1999, a study using AVS with 74 people with SAD had remarkable results. The researchers used the Beck Depression Inventory to
measure results and concluded that depression was reduced in over 80% of those in the AVS group while in the control group depression
increased. Additionally, 84% of females and 100% of the males in the AVS group also had no clinical anxiety by the end of treatment.
The researchers noted that AVS had great potential for preventing the weight gain associated with SAD. Participants over-eating and
carbohydrate cravings were reduced and they lost an average of almost 10 pounds.
For more information, choose from the resources below.
$269.00
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$159.00
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Proteus Light Sound System
is a revolutionary new light and sound machine that combines the innovative BiColortm stimulation technology
with a powerful set of additional features, all for an unbeatable price. The Proteus boasts state-of-the-art circuitry,
including an advanced processor.
Learn more about the Proteus System
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$99.00
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Sirius Light Sound System
includes 21 programs for relaxation, learning, increased energy, visualization, and sports performance.
Unique random session creates a different session every time it runs using precise stimulation protocols for
your personal exploration and special applications.
Learn more about the Sirius System
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75. Carter JL, Russell HL.
A pilot investigation of auditory and visual entrainment of brain wave activity in learning disabled boys. Texas Researcher 1993;4: 65–73.
Walter VJ, Walter WG. The central effects of rhythmic sensory stimulation.
Electroencephalogr Clin Neurophysiol 1949 Feb;1(1): 57–86.
Jorm AF, Christensen H, Griffiths KM, Rodgers B. Effectiveness of complementary and
self-help treatments for depression. Med J Aust 2002;176(10 Suppl): S84–S95.
Randi Fredricks has a Doctorate in Naturopathy and a Masters in Psychology.
She runs her own natural health business, counsels clients at Recovery Connections in San Jose, California and does long distance
phone consultations. Visit her website at
www.randifredricks.com or
contact her online.
This article is from Randi Fredricks' book
Healing & Wholeness: Complementary and Alternative Therapies for
Mental Health. Copyright © 2008. All rights reserved.
No part of this article or website may be reproduced in any form or by any electronic or mechanical means, including information
storage and retrieval systems.
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Thursday, November 20, 2008
