It sounds like your father is suffering from degenerative cervical disc disease
. This basically means that because of wear and tear, the cervical discs at many levels in your father's spine are causing some compression on the nerves and spinal cord
. I would advise you to consult a Neurosurgeon who will examine him and decide if a surgical option will be advisable keeping his age, general health, clinical examination findings and the MRI
scan findings in mind.
Hope this helps.