-the nerves that innervate your legs and feet come from the area of your L-spine and sacrum.
*L4/L5 or L5/S1 is the most common area to get a herniated disk.
As you can see above, the cervical, thoracic, and lumbar vertebrae all differ slightly in shape and size.
I found this great lil' video that shows the difference between each vertebrae and the major features like the spinous process and tranverse process (aka TVP) -where many muscles attach!