Shichida Makato says that, strictly speaking, the development of the right brain is the development of the diencephalon of the brain's right hemisphere. In other words, it is the development of the deep, unconscious levels of the brain.
七田真表示，所謂開啟「右腦」，嚴謹的說法「應該是右半球的間腦」，也可說是開發人腦深層的潛意識。