Terry Kupers, a psychiatrist and expert on confinement, described in a paper published last year the many psychological effects of solitary. Inmates reported nightmares, heart palpitations and “fear of impending nervous breakdowns.” He pointed to research from the 1980s that found that a third of those studied had experienced “paranoia, aggressive fantasies, and impulse control problems … In almost all instances the prisoners had not previously experienced any of these psychiatric reactions.”

Too often, these prisoners are “maxed out,” meaning they are released from solitary directly into society. In Colorado, in 2012, 140 people were released into the public from Ad Seg; last year, 70; so far in 2014, two.

The main light in my cellblock eventually turned off, and I fell into a fitful sleep, awakening every time a toilet flushed or an officer yanked on the doors to determine they were secure. Then there were the counts. According to the Ad Seg rules, within every 24-hour period there are five scheduled counts and at least two random ones. They are announced over the intercom and prisoners must stand with their feet visible to the officer as he looks through the door’s small window. As executive director, I praise the dedication, but as someone trying to sleep and rest my mind — forget it. I learned later that a number of inmates make earplugs out of toilet paper…

Eventually, I broke a promise to myself and asked an officer what time it was. 11:10 a.m. I felt as if I’d been there for days. I sat with my mind. How long would it take before Ad Seg chipped that away? I don’t know, but I’m confident that it would be a battle I would lose.