Light & Sound Neurotherapy (“LSN”) is a treatment with proven success for numerous problems, based on more than 75 years of basic and applied research.
The research studies summarized below document that LSN is a robust treatment that frequently results in sustained improvement for a wide variety of difficult to treat conditions, including anxiety, stress, depression, migraines, ADD, ADHD, trauma, and addiction. LSN has also been shown to enhance mental clarity and peak performance.
Summarizing across these studies, researchers have documented that frequency-based light and/or sound neurotherapy (LSN):
- Strengthens the same brainwave frequency that corresponds to the light and/or sound stimulation;
- Increases brain metabolism and cerebral blood flow;
- Appears to generate positive biochemical changes in the brain; and
- Often results in immediate clinical benefits after only a single session. Multiple sessions may result in lasting improved functioning.
Clinical researchers have found that LSN is a robust treatment effective in facilitating relaxation, meditative, and hypnotic mental states29-37 as well as promoting improvement in numerous mental and physical disorders.
Table 1 below presents the key findings from 16 clinically-focused LSN studies. These 16 studies demonstrate LSN’s effectiveness for numerous conditions ranging from anxiety, depression, and PTSD to pain-control for migraines and PMS (pre-menstrual syndrome). Four studies found LSN to be an effective adjunctive treatment for patients with substance abuse disorders.
Clinical Effectiveness Studies
- 1. Cantor & Stevens (2009)22
Study of 16 adults with treatment-resistant depression
- Significant reductions in depression only occurred during active LSN treatment with patients averaging a 70.9% improvement.
- All patients had at least a 50% reduction in depressive symptoms.
- The improvements were still present when subjects were re-assessed 4 weeks after the end of treatment.
- 2. Wolitzky-Taylor & Telch (2007)38
113 college students with pathological worry
- Subjects who received 12 LSN sessions (three times per week for four weeks) had the highest rate of clinically-significant change after four weeks at 67%.
- A follow-up conducted three months after treatment ended showed that improvements were maintained despite receiving no further treatment.
- 3. Nomura, et al, (2006)23
40 patients undergoing a follow-up endoscopy
- After slow-wave LSN treatment, 90% of subjects experienced reduced pain and discomfort during their follow-up endoscopy, compared to only 15% in the control group.
- Slow brainwave activity significantly increased in the subjects.
- The degree of pain and discomfort felt was highly correlated to the proportion of slow-wave brain activity.
108 patients undergoing ambulatory surgery
- Rhythmic sound stimulation resulted in an average 26.3% reduction in pre-op anxiety, compared to 11.1% for the music-only group and 3.8% in the no intervention group.
- Rhythmic sound stimulation was superior to music-only stimulation in reducing pre-operative anxiety.
76 surgery patients under general anesthesia
- Subjects using rhythmic sound stimulation required more than 77% less fentanyl compared to patients listening to classical music or the blank tape.
- Subjects who experienced Beta-frequency binaural beats gave more correct answers and made fewer mistakes than those who experienced theta/delta frequency beats.
- Beta brainwave stimulation was associated with less negative mood.
74 adults with Seasonal Affective Disorder (SAD)
- Following the betawave LSN treatment, 100% of subjects in the treatment group showed reduced depression, and 84% scored as being clinically non-depressed.
15 geriatric patients with dementia
- LSN patients showed significant improvements in attention.
- LSN patients made significant improvements in mood.
65 substance abuse inpatients
- 65.7% had a remission of their depressive symptoms.
- 91.4% showed a 50% or greater improvement in their Beck Depression Inventory score.
- After treatment, 65.7% scored within the normal range in Trait Anxiety.
10 substance abuse inpatients with major depression
- LSN patients averaged a 75% decrease in their feelings of depression and hopelessness.
- LSN patients averaged an 80% increase in their self-esteem.
- 90% of the LSN patients had a 50% or greater improvement.
18 substance abuse inpatients with major depression
- 72.2% had a 50% or greater improvement in their Beck Depression Inventory score.
- LSN patients averaged a 34.1 point decrease on the MCMI Major Depression scale.
10 substance abuse inpatients with PTSD (Posttraumatic Stress Disorder)
- PTSD symptoms decreased by an average of 36.4% on PDS Symptom Severity scale and 10.3 points the on MCMI’s PTSD scale.
- LSN patients averaged a 24.2 point decrease on the MCMI’s Major Depression scale.
21 patients with muscle-contraction type headache, 3 patients with acute sinusitis headache, and 4 patients with migraine headaches
- 19 out of 21 patients with muscle-contraction headache reported complete relief after treatment.
7 patients with long-standing migraine headaches
- Of the 50 migraine headaches reported, patients rated 49 as being helped and 36 as being stopped.
- LSN reduced the median duration of migraines in all patients from an average of 6 hours to an average of 35 minutes.
- 18 months after treatment, the interval between migraines had increased for 2 of the patients.
- Patients reported faster relief when using LSN in the higher frequency range and brightest setting.
55 patients with long-standing migraine headaches
- 44% reported that migraine frequency was ‘Somewhat Less’ or ‘Much Less.’
- Of the 28 patients whose migraines were normally preceded by warning signs, 53% reported that the frequency was ‘Somewhat Less’ or ‘Much Less.’
17 women with severe and long-standing Pre-Menstrual Syndrome (PMS)
- After the first treatment cycle, there were reductions in PMS symptoms for depression, anxiety, affective lability, irritability, difficulty concentrating, fatigue, change in appetite, breast tenderness, and bloating.
- Patients’ median reduction in PMS symptoms was 64% after one cycle of treatment and 76% at the end of treatment.
- At the end of the final treatment cycle, 76.5% experienced reductions in PMS symptoms of 50% or greater, and 70.6% no longer met the criteria for PMS.
- Both the severity and duration of PMS symptoms tended to return towards pre-treatment levels in the follow-up menstrual cycle.
Table 2 presents the findings from ten different studies of people with ADHD and/or learning disabilities. These findings document LSN’s effectiveness for many symptoms common in people with ADHD and/or learning disabilities. Summarizing across studies, researchers found that LSN treatment:
- Increased sustained attention
- Improved impulse control
- Decreased anxiety and depression
- Improved essential learning skills including:
- Auditory memory
- Mental processing speed
- Verbal and non-verbal IQ
- Improved academic performance
- Generated improvements similar to psycho-stimulant medication; and
- Maintained the treatment gains for up to 16-months following treatment termination.
ADHD and Learning Disability Studies
26 boys with learning disabilities
- Both groups showed improvement, but the private school group did considerably better with a significant eight point improvement in non-verbal IQ as well significant improvements in reading, spelling, and auditory memory functioning.
- The public school group showed significant improvement in only IQ (5.5 points) and spelling.
- The private school group also showed greater and significant improvement in behavior.
Learning Improvement Grade Improvement
40 learning disabled boys diagnosed with ADD (Attention Deficit Disorder)
- Compared to the two control groups, the LSN group’s verbal IQ showed a significant increase of 4.3 points after 20 sessions and 9.2 points after completing 40 LSN training sessions.
- A similar pattern of progressive improvement in reading was also found for the LSN group after 20 and 40 sessions.
- Compared to the control groups, the LSN group showed significant improvement in their ability to sustain attention and inhibit impulsive behaviors.
Learning Improvement Grade Improvement
25 children diagnosed with ADHD
- LSN significantly improved the children’s ability to sustain attention, and decreased impulsive behaviors.
- LSN significantly enhanced scholastic achievement.
- Three months after treatment ended, the improvement in scholastic achievement scores was maintained.
A follow-up to their 1994 study of 40 learning disabled boys (see no. 2 above)
- Significant gains in verbal IQ and enhanced ability to sustain attention were maintained for 16 months following LSN treatment termination.
- The improvements in ability to inhibit impulsive behaviors were not maintained.
Replication of 1994 study (see no. 2 above)
- Both the ADD and ADHD treatment groups showed significant improvements in verbal and non-verbal IQ.
- These IQ gains were maintained for 9 months following LSN treatment termination.
Replication of their 1994 study with learning disabled girls, conducted by an independent researcher at a different university
- LSN treatment resulted in significant increases in verbal and non-verbal IQ.
15 boys diagnosed with ADD or ADHD
- The LSN-only group significantly improved their Raven IQ test performance from 105.9 to 115.0. There was a less though still significant change for the Ritalin-only group.
- All of the ten subjects in the LSN-only and LSN-Ritalin groups showed significant improvement in their PPVT IQ scores.
- All of the five Ritalin-only subjects showed a decline in their PPVT IQ scores.
Open clinical trail comparing four groups of children with ADHD
- Overall, both the LSN-only, and combined LSN/medication treatments were superior to stimulant medication alone.
- The LSN-only group showed significant improvements on the reading and spelling sections of the WRAT and the Raven.
- The LSN-only group showed significant improvement in their ability to sustain attention and decrease hyperactivity.
- All of the LSN group’s cognitive and behavioral improvements were maintained when assessed one month after the end of treatment.
16 college students seeking academic counseling
- The GPA’s of the LSN students significantly increased by an average of .7 points in the quarter following treatment termination.
34 special education students
- The LSN students showed significant improvement in their ability to sustain attention, inhibit impulsive responses, and improved reaction times.
- The LSN students significantly improved their reading scores compared to the control group.
204 students from seven public schools (1st – 11th grades) with a history of impulsivity, distractibility, and learning problems
- The LSN students showed significant improvement in anxiousness, depression, hyperactivity, and inattention.
- The LSN students showed significant improvement in reading, averaging an eight month gain in grade-equivalent reading scores following three months of LSN treatment.
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