Thank you very much for the recommendations. His most bothersome symptoms are muscle pain in his right mid-back, tremors, and nausea. Cognitively he is functioning very well. He has tried a chiropractor for the back pain, but unfortunately that didn't help much, but I know that results are highly dependent on the practitioner. We are going to try to find a massage therapist for him next, as well as visit the person in Delray known as the "foot whisperer." I will give a detailed report on our visit once we do so in case anyone else is interested.

The laser therapy is in fact one area I have on my to-do list to investigate, so I appreciate your anecdotal evidence. Neurofeedback helps with his anxiety and depression, and his tremors stop while we are doing the training, but return when the session is over. But the same is true for when he meditates. (It helps anxiety and tremors temporarily.)

I have a neighbor who is a researcher in the neuroscience department of the local university, so I will discuss the helmet idea with him next time I see him. Perhaps they might sponsor a study with grant money, or design a helmet themselves. Since the treatment is only six minutes per day, I don't see why a helmet couldn't be designed with empty placeholders, and the user could switch the position of one or two LED lights around the head to offset the cost. If the LED with lens, casing, and fan cost a total of $400, then I could see creating a helmet that costs below $1,000. I will also approach the bioengineering department to see if this is a project they might be interested in undertaking with their students.

With regard to naturopathy, we are lucky to have a mainstream MD who is also a functional medicine specialist, and who embraces some of the theories that first began with naturopaths. We are currently investigating SIBO as the cause of my father's nausea. According to one study, 55% of people with Parkinson's also have SIBO, perhaps due to poor gastric motility. If he does have SIBO, low-dose naltrexone has successfully been used in treatment-resistant cases, as promotes motility and decreases inflammation of the gut:

http://www.ldnscience.org/interviews...in-ibd-ibs-rls

As I am sure has been discussed many times on this forum, LDN is also a medicine that has been reported to help some people with Parkinson's, so it would hopefully help with SIBO as well.

He tried acupuncture for the nausea and it worked well the first couple of times, but then didn't have much effect. I don't know much about grounding or what type of detoxing therapy you have experience with, but I think chelation therapy is sometimes used in cases of heavy metal toxicity. I don't know what efficacy it has, since I haven't looked at the research.

I will take more of a look at what you're suggesting, and I really appreciate your response