Dear Mr. Nambiar
The weakness in dorsiflexion
and foot drop
can have either neurological causes or even issues related to muscles as in palsy
or muscular dystrophy. Your Mri has indicated of disc bulge and encroachment to neural recess of L4-5 So this can be taken as tentative cause.
Well mr. Nambiar I believe I will not recommend surgery as the first option in such cases. In Ayurveda there is a procedure which is called Kati Vasti in which medicated oil slightly heated is kept over affected area for about half an hour to 45 minutes. These oils contain analgesic
, anti inflammatory and muscle tonic herbs. I have seen excellent response in such cases. More so it is non invasive technique.
In case the cause is with muscles then fomentation with herbs and oil massage
I wish and hope that this will cure you.