According to Brinkman, as the brain evolved, one side became specialised for fine control of movement (necessary for producing speech) and along with this evolution came righthand preference.

• 根据Brinkman，认为的大脑发展，一面变得专门很好的控制行为(产生语言能力的需要)并且沿着这种发展成为惯用右手偏好。