GENERAL ANATOMY
NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An average of 86 billion neurons
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An average of 86 million neurons
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An average of 86 thousand neurons
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An average of 86 trillion neurons
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Now I bet you wish you payed attention to all those fun facts
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Detailed explanation-1: -Remarkably, at an average of 86 billion neurons and 85 billion nonneuronal cells (25), the human brain has just as many neurons as would be expected of a generic primate brain of its size and the same overall 1:1 nonneuronal/neuronal ratio as other primates (26).
Detailed explanation-2: -For half a century, neuroscientists thought the human brain contained 100 billion nerve cells. But when neuroscientist Suzana Herculano-Houzel devised a new way to count brain cells, she came up with a different number-86 billion.
Detailed explanation-3: -At birth, a baby’s brain contains 100 billion neurons, roughly as many nerve cells as there are stars in the Milky Way, and almost all the neurons the brain will ever have. The brain starts forming prenatally, about three weeks after conception.
Detailed explanation-4: -The human brain contains about 86 billion nerve cells (neurons)-called “gray matter, ” according to a 2012 study published in the Proceedings of the National Academy of Sciences.