Robert M. Sapolsky Quote

The cognitive capacities of near-term fetuses are even more remarkable. For example, fetuses can distinguish between two pairs of nonsense syllables (biba versus babi). How do you know? Get this—Mom says Biba, biba, biba repeatedly while fetal heart rate is monitored. Boring (or perhaps lulling), thinks the fetus, and heart rate slows. Then Mom switches to babi. If the fetus doesn’t distinguish between the two, heart rate deceleration continues. But if the difference is noted—Whoa, what happened?—heart rate increases. Which is what DeCasper reported.61

Robert M. Sapolsky

The cognitive capacities of near-term fetuses are even more remarkable. For example, fetuses can distinguish between two pairs of nonsense syllables (biba versus babi). How do you know? Get this—Mom says Biba, biba, biba repeatedly while fetal heart rate is monitored. Boring (or perhaps lulling), thinks the fetus, and heart rate slows. Then Mom switches to babi. If the fetus doesn’t distinguish between the two, heart rate deceleration continues. But if the difference is noted—Whoa, what happened?—heart rate increases. Which is what DeCasper reported.61

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About Robert M. Sapolsky

Robert Morris Sapolsky (born April 6, 1957) is an American academic and neuroscientist. He is the John A. and Cynthia Fry Gunn Professor at Stanford University, and is a professor of biology, neurology, and neurosurgery. His research has focused on neuroendocrinology, particularly relating to stress. He is also a research associate at the National Museums of Kenya.