In the second half of the book the author gives examples from art, culture, society and literature that show how this brain arrangement has weaknesses and has failed in various ways in human history. Without the left brain, civilization would be impossible but ideally the left and the right brains, different and in some ways conflicting, should complement and keep a check of each other.
The problems arise when the detached and abstract left brain sees itself as the ‘master’ rather than ’emissary’ and so we miss the holistic and profound.
As I read this fascinating book, I was left with one simple conclusion – there is no doubt that the majority of ADHD people are significantly more dominantly right-brained than left.
My experience with other ADHD adults have always shown tendency towards the right-brain domains such as big-picture seeing, humour, emotions, creativity, invention and empathy and have often shown problems in the left-brained domains such as making decisions, narrow-focus and disregarding facts to suit!
It’s significant that the right-brain is more neurologically tightly connected and uses nor-adrenaline/nor-epinephrine for communications. The left brain has further distances to travel and with dopamine for communications. Most medical research implicates dopamine as the primary “faulty” neurotransmitter at issue in ADHD. So there is poor dopamine signalling, it’s not surprising that ADHD people would use the easier to access right brain, than their weaker signalling and slower left.
In ADHD with a less-dominant left brain there is a struggle to focus on detail, lessened self-interest, a reduced sense of purpose to organise and control. Yet with a dominant right-brain with ADHD, there is a profound sense of emotion, a greater breadth, flexibility and generosity, an experience of time as a continuum, a strong response to music, poetry, the spiritual and moral dimensions.
More research is needed!