Here are some ideas that may help (Only in addtion to what you feel is important for your patient is done)
1) trace the arm meridians of the affected side - look for skin changes, nodules, tenstion, etc. Then apply acupuncture or TuiNa techniques that you feel comfortable with to bring balance in the affected area. I would not underestimate the Ashi points.
2) As Chad has mentioned, neck is often a major player. Huatuo points, meridian pathways need be checked and cleared. You said the patieint's neck problem has been cured. But in many cases the patient may be pain free, not problem free. Gentle Tui Na near ST 11/12 area may reveal some information - affected side vs normal.
3) From the description of your patient, anywhere from T1-7 area may have sizeable knots. Small but significant number of patients may get arm/hand issues from those areas. Check the Huatuo points and points nearby such as GB21, SI13, BL41-45.
4) This type of issue may involve brain plasticity. Refer to this book and you may find useful information how to approach this case: See Chapter 22. http://books.google.com/books?... scalp acupuncture may prove useful.
5) This is just my personal opinion. Perhaps giving some more time between the treatments may help - given you feel you found a sound treatment stragety. Often patient needs to bring major changes in their lifestyle in combination with our treatments - otherwise the progress in this particular case may be too slow or you may be giving only temporary relief. Meditations, walking in the woods, tai chi or yoga... probably essential thing for a very stressed patient.