Fasciculations can be related to cord compression but if there is thoracic cord compression and fasciculations occur in the upper extremities, this is not related to thoracic cord compression. Faciculations occur “down river” from the compression and will not occur “up river”.
I wrote two chapters about the most common non-spinal disorders that can occur to cause these symptoms. It would be difficult to cover all of these conditions here but any good neurologist or rheumatologist should be able to help deduce what the potential disorders are.
Now, degenerative disc disease is caused by genetics, trauma, occupation and advocation.