In the six months since scientists announced they had infused a drug made from human embryonic stem cells into a partially paralyzed patient’s spine, the identity of the recipient has been shrouded in secrecy.

Recently, rumors began circulating in Internet chat rooms that details about the closely guarded experiment were finally about to be revealed.

Now, a 21-year-old Alabama nursing student who was paralyzed from the chest down in a car crash in September has come forward to identify himself as the volunteer.

“I was the first patient,” Timothy J. Atchison of Chatom, Ala., said in a telephone interview with The Washington Post on Wednesday evening. “I’m doing well.”

Atchison, known as T.J. to his family and friends, was a student at the University of South Alabama College of Nursing when his car crashed on Sept. 25, which, Atchison noted, was the birthday of Christopher Reeve, the actor who suffered a devastating spinal cord injury.