It occurred to me that the rigid neck might be connected to Parkinson's. Could be; here's what I found online:
Rigidity is stiffness and resistance to limb movement caused by increased muscle tone, an excessive and continuous contraction of muscles. In parkinsonism the rigidity can be uniform (lead-pipe rigidity) or ratchety (cogwheel rigidity). The combination of tremor and increased tone is considered to be at the origin of cogwheel rigidity. Rigidity may be associated with joint pain; such pain being a frequent initial manifestation of the disease.
In early stages of Parkinson's disease, rigidity is often asymmetrical
and it tends to affect the neck and shoulder muscles prior to the
muscles of the face and extremities. With the progression of the disease, rigidity typically affects the whole body and reduces the ability to move.
This is Wiki, of course, but tracks with other stuff I read. I'm just wondering if Dad's docs are all coordinated. Does Wiggins have all the info about Parkinson's from his neuro doctor, etc? Anyone know?