The woman joking with me across the table was born with only half her brain. Something catastrophic happened while she was in her mother’s womb, though no one knows what for sure. It wasn’t a stroke, because stroke destroys healthy tissue, and Michelle Mack’s left hemisphere simply never developed. Her doctors speculated that her left carotid artery, which supplies blood to the left hemisphere, may have become blocked while Michelle was still a fetus, preventing that hemisphere from forming. At birth the doctors gave her the usual tests and told her mother, Carol, that she was a normal baby.
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missing an entire hemisphere and living a seemingly normal life.
