For 30 years many longitudinal studies from major universities have shown that the improvements in brain function last. See website below for studies.
It takes about 30-40 sessions. Each session is 40 minutes. For severe or moderate autism, the LENS system takes just 5 minutes. The LENS system protocol is 15-25 sessions.
There have been hundreds of thousands of treatments given around the world in the last 30 years with no long-term adverse effect ever reported.
All neurofeedback equipment is approved by the FDA. It can only be sold to licensed professionals in the health field.
My name is Donald Magder. I am a clinical psychologist