[EdZ]

There was a film done by TGC with Jim McLean and Sam Snead. The video has a lot of footage of Sam Snead's swing. In the film Mr. Snead indicated that he allowed his head to swivel a little, but otherwise he kept the head steady.

I think that from some of the posts from Mr. Skywalker... we can see that in order to keep a centered HEAD in a golf stroke, the various portions of the SPINE(Cervical, Thoracic, Lumbar) are not staying straight like a ROD. Actually... if this is attempted, the HEAD WILL most likely MOVE during the stroke.

That swivel of the head is a move more people should use IMO. One of the reasons people tend to move their head in the first place is that it gets in the way of the shoulder turn.

Far easier to both keep a steady head, and to get a fuller turn, with the chin swiveled before the takeaway ala Snead and Nicklaus.