I was thinking laser might be good if you might have sore/tight muscles in neck or back/chest areas..
I'm not sure about any use for head/brain....past posts on our Parkinson's forum have mentioned a helmet with LEDS or laser diodes...for brain therapy related to PD..no recent updates on it though..

[Therapeutic lasers (where the mechanism is not based oh heat):
Laser Wavelength Use
GaAs 904 nm (super pulsed) Treatment of deep problems (back, shoulders, knees, head ache etc)
GaAlAs 780-808-890 nm (cont. or chopped) Also deep problem, often a complement ot the GaAs-laser
InGaAlP 630-700 nm Treatment of skin and mucose problems
HeNe 633 nm Alternative to InGaAlP (see above) ]
more info-
Frequently Asked Questions about Laser Therapy LLLT biostimulation low power laser.

It's been years , so I don't recall the brand name of the one my past chiro used, it was used mostly on my elbow, shoulder, wrist & low back.. soft tissue/joint areas..