My Dear :
Lowe back pain
is a huge subject and it is more than that you are able to describe. The pain that you have experience needs more analysis special in your age . The pain in elderly due to a lot of reasons but in your age the limited and organic reasons has to be ruled out. Further questions needed to be answered like wither if there is any history of accident? how long this pain been there ? any history of fever
and weight loss
? Any history of professional sports ? Any injuries at all ?
Hands numbs goes along with back pain and cold weather, rain and snow make hands shake at times along with twitching .... This make the situation more interesting and required more information to role out rheumatological, vascular reasons. The back does not affect hand or vise versa. I think you need to some body ( rheumatologist
) to get all of these questions answered. You might need simpler investigation than MRI, rheumatological blood work up to differentiate between the differential diagnosis ...