Hello and Welcome to ‘Ask A Doctor’ service.
I have reviewed your query and here is my advice.
Tuberculosis of the vertebrae C5, C6 andC7 with all the history that you have given looks to be on a correct line of treatment.
The problem seems to be on the effectiveness of the ATT.
Neurological involvement due to any disease in the cervical region will have its complications as your Father has developed.
Please request your Doctors to also see whether this is MDR tb or not.
This will take a long course of treatment and recover.
Also go for
Physiotherapy for the muscles of the body to be in good shape.
Also needed are the medicines working as
nerve tonic, special care treatment for the conditions your Father is going through.
Hope I have answered your query.
Let me know if I can assist you further.