Subject: Is time of the essence for an atrophied leg muscle to regain its full use?

If a leg muscle has atrophied because of lack of use following an 
injury, is there a time limit over which the muscle can no longer 
regain its full use?  For example, can such a muscle regain its use 
after ten years?  Thank you.  Darrin Gitisetan. 

Re: Is time of the essence for an atrophied leg muscle to regain its full use?