Psychological and Physical Torture (invisible) PTSD – Bush administration

"To violate the statute, an individual must have the specific intent to inflict severe pain or suffering," "Because specific intent is an element of the offense, the absence of specific intent negates the charge of torture. ... We have further found that if a defendant acts with the good faith belief that his actions will not cause such suffering, he has not acted with specific intent,"

The intent is to use force and harm, torture, and claim that there is no specific intent to escape prosecution. Another intent is to use people’s ignorance that psychological torture is not harmful or does not inflict suffering.
Psychological torture is usually used because of its invisibility, and to try to escape prosecution, but it has serious mental and physical effects.

Degrading themes and humiliation were used in this example. “Other memos allowed the use of such tactics as keeping a detainee naked and in some cases in a diaper, and putting detainees on a liquid diet…"Detainees subject to sleep deprivation who are also subject to nudity as a separate interrogation technique will at times be nude and wearing a diaper,"”

Sleep deprivation and a liquid diet do effect the body physically and can lead to very serious illnesses, one of them being acid-base disorders.

High levels of stress, sleep deprivation, and liquid diets all reduce macrominerals like potassium in your body which leads to acid-base disorders. The reduction in macrominerals and higher levels of cortisol can also lead to PTSD.

http://www.cnn.com/2009/POLITICS/04/16/us.torture.documents/index.html