Sternum to the Right Strong Ergonomic Indication

In some cases the sternum is twisted to the right. Why?

This fits very well into my “ergonomics+genetics-theory”. The reason for the sternum to be more dragged to the right is according to my theory the fact that most people are right handed.

What do we humans do that can explain the asymmetry of the sternum to the right?

 

 

The illustration shows what happens while using a computer with an ordinary mouse.

1.       The whole arm moves sideways.

2.       The shoulder rotates.

3.       The muscles in the upper back becomes shorter because of spasm and drags  the  sternum  inwards more on one side, in this case to the right.

Tip: Use of a track ball mouse is preferred from an ergonomic perspective and keeps (if used correctly) the shoulder in an “un-rotated” position. I personally prefer a handheld track ball mouse. A little tricky in the beginning but after a while very easy to use and ergonomically; I would say perfect.

This means that I believe that all types of positions that rotates the shoulder may be a potential reason to the twist to the right. Another reason could be to sleep on the right side most of the time.