Ep 197: right brain, left side body; left brain, right side body… why?



right brain, left side body; left brain, right side body… why?

Our brains have crossed wires. Each cerebral hemisphere controls the opposite side of the body. When I move my left hand, it’s my right brain that’s doing it. Today, Phil and I look at a theory about how and why that’s true for us, and every other animal with a spine.

Along the way we talk about vertebrate brain structure. Here’s a link about some of the older structures in our brain, that we share with most vertebrates, like birds and dogs and frogs and turtles and…

The old brain

We also talk a bit about the yolk sack that humans have before we’re born. Here’s a link.

Yolk Sac Development


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