An article has been published on the website of Psychiatric Times (http://www.psychiatrictimes.com/electroconvulsive-therapy/rise-cranial-electrotherapy) that describes how cranial electrotherapy devices such as the Fisher Wallace Stimulator are used to treat insomnia, anxiety, and depression.
In July of 2014, the US FDA announced that it plans to approve the device to treat depression, anxiety and insomnia. The cranial electrotherapy medical device is the only home-use device approved (in the US) to treat depression.
The article is written by Stephen N. Xenakis, MD.