A PST unit transmits electrical pulses to targeted auricular (ear) zones in a process known as auricular therapy. The benefits as noted in several previous research studies is believed to be derived from:

1)Release of endorphins: Previous studies have shown that stimulation of auricular points can bring about release of endorphins in animals and humans.

2)Activation of the Brain Stem: Stimulation of auricular points is believed to cause activation of cranial nerves, which appear to superficially innervate the ear.The stimulation may modulate brain response.

3)Enhancement of brain activity: Auricular stimulation has demonstrated physiological changes in functional activity of the brain as noted on function magnetic resonance imaging.

1. Ng L, Auricular acupuncture in animals: effects of opiate withdrawal and involvement of endorphins, J. Compl. Alt. Med. 2 (1996), 61-64.

2. Young and P. McCarthy, Effect of acupuncture stimulation of the auricular sympathetic point on evoked sudomotor response, J. Altern. Complement. Med. 4 (1998), 29-38.

3. D. Alimi, A. Geissmann and D. Gardew, Auricular acupuncture stimulation measured on functional magnetic resonance imaging, Med. acupuncture 13 (2002), 18-21.)