[QUAD-L] Incomplete quads -- ability to gain strength?

[Gail Overton]

My husband is an incomplete C3 quad able to move every muscle except still weak 
after almost 1.5 years of therapy (started out at 6 hours per week and now up 
to 10 hours per week). People tell me ten hours of therapy per week is not 
enough, especially when they only work on one muscle group 15 minutes say 2 to 
3 times a week. Are there any “incomplete” quads out there with this type of 
experience and trying out therapy only to find they cannot get stronger? HELP!