WASHINGTON — Medical examinations of former terrorism suspects held by the U.S. military at Abu Ghraib prison in Iraq and Guantanamo Bay, Cuba, found evidence of torture and other abuse that resulted in serious injuries and mental disorders, according to a human rights group.

For the most extensive medical study of former U.S. detainees published so far, Physicians for Human Rights had doctors and mental health professionals examine 11 former prisoners. The group alleges finding evidence of U.S. torture and war crimes and accuses U.S. military health professionals of allowing the abuse of detainees, denying them medical care and providing confidential medical information to interrogators that they then exploited.

“Some of these men really are, several years later, very severely scarred,” said Barry Rosenfeld, a psychology professor at Fordham University who conducted psychological tests on six of the 11 detainees covered by the study. “It’s a testimony to how bad those conditions were and how personal the abuse was.”

One Iraqi prisoner, identified only as Yasser, reported being subjected to electric shocks three times and being sodomized with a stick. His thumbs bore round scars consistent with shocking, according to the report obtained by The Associated Press. He would not allow a full rectal exam.

Another Iraqi, identified only as Rahman, reported he was humiliated by being forced to wear women’s underwear, stripped naked and paraded in front of female guards, and was shown pictures of other naked detainees. The psychological exam found that Rahman suffered from post-traumatic stress disorder and had sexual problems related to his humiliation, the report said.

The report came as the Senate Armed Services Committee revealed documents showing military lawyers warned the Pentagon that methods it was using post-Sept. 11, 2001 violated military, U.S. and international law. Those objections were overruled by the top Pentagon lawyer.

President Bush said in 2004, when the prison abuse was revealed, that it was the work of “a few American troops who dishonored our country and disregarded our values.” Bush and other U.S. officials have consistently denied that the U.S. tortures its detainees.

Physicians for Human Rights, an advocacy group based in Cambridge, Mass., that investigates abuse around the world and advocates for global health and human rights, did not identify the 11 former prisoners to protect their privacy. Seven were held in Abu Ghraib between late 2003 and summer of 2004, a period that coincides with the known abuse of prisoners at the hands of some of their American jailers. Four of the prisoners were held at Guantanamo beginning in 2002 for one to almost five years. All 11 were released without criminal charges.