In our past publications, we have pointed out the following gross technical errors inherent in the practice of vectored adjusting techniques such as Grostic, N.U.C.C.A, Orthospinology, A.O., etc. There are many technical discrepancies, but among the most notable are the variations in notch transverse distances (letter #16) and inherent head placement errors.

Now, let's examine the nasium film and observe another major "discrepancy" that has been overlooked by these techniques: the variations in the angle of the transverse process as it projects out from the lateral mass and the way these inherent variations grossly alter the mechanical effect of the force that the adjustor is intending to apply.

When viewing the nasium film, if you will place a dot on the lateral aspect of the lateral mass in the middle of the root of the transverse process and another dot on the tip of the atlas T.P. on that same side and connect those two dots, you will find that there is a wide variation in the angle (almost always downward) at which the T.P. projects from the lateral mass. You will also find that this angle can vary 15 degrees or more from atlas to atlas.

So let's take a look at the effect these variations in the "transverse process angle" have on the "calculated line of drive," why the "calculated line of drive" and the actual applied line of drive wind up being two entirely different things.

Since, as mentioned above, most T.P.'s project downward, let's just examine the effect variations in downward projected T.P.'s have on the L.O.D.: considering the fact that when using the Grostic technique, degrees are converted into inches (roughly, every 2.5 degrees equals one inch in the height factor of the L.O.D. on the nasium film,) a variation of just 5 degrees in the downward projected angle of the T.P. will create a discrepancy of 2 inches in the actual "applied L.O.D".

If one patient is adjusted at a + 2 with a downward T.P. projection angle of 3 degrees, and another patient is adjusted at a +2 with a downward T.P. projection angle of 8 degrees there is a difference of 5 degrees, or, when converted to inches, a difference of 2 inches in the L.O.D. that is actually applied – an error of 100 percent.

The more the T.P. is angled downward, the higher the applied L.O.D. automatically becomes.

If there is a downward discrepancy of 10 degrees from atlas to atlas, the difference in the actual applied force would be the equivalent of 4 inches in the L.O.D.- a L.O.D of +2 automatically (unwittingly?) becomes a L.O.D. of + 6, or, an unaccounted for discrepancy of 300 percent.