Are you left-handed or know someone who is?
Are there left-handed people in your family?
Left-handed people have been treated with suspicion for centuries.
Left handedness has always been with us. Historically it has been perceived as an anomaly or defect which meant that left-handed children were “trained” out of left-handedness.
Research On Left-Handedness
Because of concern about left-handedness, there has been much research done about left-handedness over the years. The research on left-handedness has been helpful because it is showing that left-handedness is not an isolated trait. It has, in fact, been correlated with many other conditions and diseases.
By investigating the relationship between left handedness and other conditions, the research community has unwittingly provided us with clues to the emerging identity of the highly sensitivity. The HSP trait was named by Elaine Aron, Ph.D. in her book, The Highly Sensitive Person, in the 1990’s.
One of the most important research studies was conducted by Dr. Norman Geschwind. His work, often called the Geschwind Theory, shows that there is a relationship between maternal testosterone, lefthandedness, and genetic diseases.
What that means is that when a pregnant woman has very high stress levels, the testosterone in her body rises which causes the fetus to develop differently. This condition can create left-handedness, the highly sensitive trait, and many genetic diseases, which can coexist. The New York Times profiled the Geschwind study in their article: Left vs. Right: Brain function Tied to Hormone in the Womb.
Another excellent resource for highly sensitive people on the relationship between left handedness and genetic diseases is the H.I.S.S. of the A.S.P, written by David Ritchey. This book discusses the relationship between prenatal testosterone due to stress, and the development of the highly sensitive person. David Ritchey cites the Geschwind Theory along with other research including his own showing the prevalence of left-handedness and genetic disorders among highly sensitive people or anomalous sensitive people – his name for highly sensitive people.
Stress, Left-handedness And High Sensitivity
The human race has been suffering with high stress levels for centuries. When that stress affected pregnant women, humans were born with a wide variety of conditions including high sensitivity and left-handedness. Over time, these and other genetic conditions have been passed down from one generation to another.
The research on left-handedness is providing us with the causal link between stress, maternal testosterone levels and the many human illnesses and conditions they create. It would be helpful if it could make us more aware of how important managing stress is and the impact of ignoring it.