COR. Yes COR, not a typo for VOR, it stands for Cervical Ocular Reflex. I posted this under ‘Symptoms’ because the state of the COR interrelates with that of the VOR and can affect the eyes. The article’s pretty technical but when it comes down to it the bottom line, in this case quite literally, tells it all
These findings suggest that neck immobility may indeed play a role in the oculomotor disturbances observed in patients with neck complaints
Although MAV’s obviously not a ‘neck complaint’ many people complain of neck stiffness, tightness etc and also because of triggering symptoms people hold their necks stuff and still and it’s those actions that can affect the COR. It’s the slow natural movement of the neck which activates COR. Interestingly it doesn’t respond to fast corrective measures. I admit much of the technicalities are somewhat beyond me but apparently COR activates more in older people and in those with vestibular deficits and can make up for defects in the VOR which can naturally occur as a result of aging. Therefore I thought it’s existence worth noting. It certainly pays to keep the neck moving freely.