Thanks Asha - I'll try and offer some translations...

Csp = Cervical spine
AROM = active range of movement
VBI = Vertebro-basilar artery insufficiency test
MFR = myofascial release
US = ultrasound
DNF = deep neck flexors

Hope that helps...

In an interesting aside the guy dropped in this morning to say that he no longer had neck pain and felt that the headaches were being generated solely on the right posterior aspect of his skull after about 6 hours sleeping in side-lying, then resolved completely once standing....

The plot thickens...

Cheers,
Ray