Side to side control Tone is regulated side to side, movement consciously initiated from each cortex, etc. You’ll want this to be regulated pretty much equally side to side or imbalances and asymmetries will emerge over time. It's important to note that we still want brain lateralization! Two easy tests to perform: 1. Test blood pressure on both arms. More than once and maybe even over a whole day or two to ensure it’s representative of an overall tendency. Are there significant side to side differences? (Also want to watch pulse pressure, the difference but for cardiovascular reasons). Disclaimer: It might be possible to do this too often in a day, ask your doctor to do it if needed. 2. Cerebellum test - Diadochokinesia test. This tells you something about the function of the cerebellum which during our first years of life is supposed to build important connections to several parts of the upper brain. Things to watch for: - Does one side tire more than the other? - Are you able to maintain rhythm etc. If it’s too easy, start flipping the hand, alternating the side that hits the other. Start there and you can always go more into depth with testing to deduce which brain areas might not be communicating optimally. Whether it be frontal lobes, parietal lobes, etc. Primitive reflexes should always be tested on each side, pay attention to differences there too.