Hi Muhana,

FES ( Functional Electrical Stimilation) is useful for paraplegic patients in biped gait. However, it cannot be used for VERY SEVERE SPASTICITY. Here's the link of an article which I think would be able to give you an idea on "Gait Restoration in paraplegic patients using Mutichannel Surface Electrodes FES.

http://www.rehab.research.va.gov/jou.../pdf/kralj.pdf

Goodluck!!!

Regards,
Charlize29