Cervical spondylosis is the term given to osteoarthritis of the neck. Degeneration of the neck begins in your 20s and is a normal part of aging. It does not always lead to pain, but may be associated with pain and stiffness. It is quite common for people to show degenerative changes of the neck on x-ray but present without pain. Asymptomatic degenerative changes occur in about 50% of adults over the age of 40.
Congenital muscular torticollis is a condition in which an infant holds his or her head tilted to one side because of a shortening and tightening of one of the muscles in the front of the neck.
Cervical radiculopathy refers to pain and any neurological symptoms (i.e. numbness, pins and needles or weakness in the arms) caused by any condition that irritates a nerve root in the neck.