A 40-year old lady had been suffering for years from neck pain. Despite repeated attempts with conservative treatment, the patient's symptoms worsened and were marked by the onset of transient paraesthesia, transit loss of muscle tone in the legs and drop attacks. What can be the most probable diagnosis for this neck pain, paraesthesia and transit loss of muscle tone in the legs and drop attacks?

*This image based case is from Docplexus editorial team for educative purpose only. Source: FONAR