There are various brain stimulation therapy modalities discussed in

There are various brain stimulation Therapy modalities discussed in this unit. 

Are you in favor of or opposed to these modalities? Provide rationale. 

There has been recent increased interest in do-it-yourself brain stimulation as a means of improving cognitive ability (Lumosity). Explain your opinion regarding do-it-yourself brain stimulation. 

Use two APA references no older than 5 years.