“…(The Greek word for “stupefy”, “karos”, provides the basis for our modern “carotid.”). Indeed, Rufus of Ephesus, circa 50 AD, described the almost immediate change in blood flow and mentation when the vessels in the neck were compressed ( Munster et al, 2016 ). For the 1,800 years that ensued, the notion that there was a profound slowing of the heart rate with compression of the neck vessels was attributed, somewhat correctly, to the nerves adjacent to the carotid ( Glick and Covell, 1968 ; Persson and Kirchheim, 1991 ).…”