Why Are There Righties & Lefties

The video explores the concept of handedness, highlighting the prevalence of left-handedness among certain groups like baseball players and U.S. presidents. It delves into evolutionary theories, suggesting that hand dominance may be a result of cooperation or brain asymmetry. The video explains how the human brain's asymmetry might influence hand preference, with the left hemisphere often controlling language and the right hand. It concludes by appreciating the role of both hands in daily tasks.

What percentage of Major League Baseball pitchers are left-handed?

• 10%

• 70%

• 30%

• 50%

Which group of animals does not consistently favor one hand over the other?

• Birds

• Chimps

• Dogs

• Cats

What is one theory about why humans developed a dominant hand?

• Due to environmental factors

• To enhance survival skills

• As a result of brain asymmetry

• To improve balance

How do left-handed individuals often process language differently?

• Evenly across both hemispheres

• More on the right side of the brain

• Not at all

• More on the left side of the brain

What is the contralateral nature of the brain?

• Each hemisphere controls the same side of the body

• Each hemisphere controls the opposite side of the body

• Neither hemisphere controls the body

• Both hemispheres control both sides of the body