I have not had personal experience.
However, I do have a client who's nephew has ALS and she recently mentioned this computer program which can really help people who need an eye-gaze communication system if they have a severe neuromuscular impairment.
It has nothing to do with massage, but in the event it is helpful information for your client, I wanted to add it. My client says it has opened up a whole new world to her nephew:
May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view. May your mountains rise into and above the clouds. May your rivers flow without end, meandering through pastoral valleys tinkling with bells ...