Okay Edward I am ready; I am posting my answer here;
Yes, I agree this could be coming from spine, and this may also be due to sciatica that is causing this difficulty with walking you have been having
There are certain other possibilities too that need to be explored that can explain the type of difficulty with walking you are having and examples for such conditions include the following;
Neuropathies (primary nerve conditions in the legs)
Myopathies (primary muscle conditions in the legs)
Chronic Vitamin deficiencies etc
I am not telling all these above possibilities are applicable in your case, I am trying to provide you with a list like this because these are the various possibilities we see in our clinic when someone presents with the type of symptoms you have mentioned above
This needs to be further evaluated and investigated to find out the precise cause for this manifestation. In this regard you may try to see a neurologist in the clinic so that you can receive a thorough neurological examination in the clinic followed by certain relevant neurological investigations too - that may include an MRI scan of the spine (focusing on the spinal cord, spinal nerves, disc etc), possibly an MRI scan of the brain, an EMG/Nerve conduction study of the legs - which is a nerve & muscle test that is used to check for pinched spinal nerves, sciatica, neuropathy, myopathy etc–, certain specific blood tests, and any other tests as necessary and then treated appropriately depending upon the test results.
In the meantime please continue with aggressive physical therapy as before. Once precise diagnosis is made with the above systematic approach appropriate & specific treatments will be started, and till then please continue with physical therapy
Once again I concur with you, this could be spine condition/sciatica etc, but we need to explore the various other possibilities as mentioned above too. And please see the presence of above mentioned symptom (slow decrease in ability to walk, and difficulty with sustained walking etc) do not automatically point towards some serious health conditions, in fact there are many benign non-serious health conditions too can cause these type of symptoms. This type of health condition can be diagnosed & successfully treated, so please not to be scared. An early diagnosis and treatment gives the best chance for quick & complete cure, so please try to get this further evaluated and investigated asap through the involvement of a neurologist – as mentioned above - for the best results!
Wishing you a quick & complete recovery! And also Wishing you the best health!
All the very best!
Please let me know if you have any additional questions or if you want to discuss this further.
Assuring you the best services!
Dr Subbanna MD