Actually, Willow Golf, I liked your technical description of the lateral rotation stated as "'L' shape straight up. It is certainly a phrase everyone can relate to. (And there I go dangling a participle) For clarification, "adhesive capsulitis" is more commonly known as a Frozen Shoulder. There is much controversy about the diagnosis and the treatment. Cortisone truly works in that, in my esoteric opinion, it interrupts the distress on the central nervous system and the joint can relax and do it's job of healing.
Vickie
I had adhesvie capsulitis (frozen shoulder) 5 years ago. Adhesive capsulitis starts off with intense pain in the shoulder area. Later on the pain decreases, but the range of motion becomes severely restricted. Most doctors misdiagnose this ailment. The medical professionals that will know whether a person has frozen shoulder are physical therapists and doctors specializing in sports medicine.
The PT showed me some stretching exercises to get my range of motion back. I was one of the lucky ones; my range of motion after 2 months was good enough to allow me to resume golfing, and I had my full range of motion back in 5 months. Most people with frozen shoulder require 12 to 18 months to get full range of motion back.