GROWTH DEVELOPMENT CHILD
MEASUREMENT OF INTELLIGENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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As well as transmitting messages through the spinal cord, neurons transmit messages from one part of the brain to another.
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The points where neurons meet and transmit information to each other are called synapses.
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Each neuron may be connected to as many as 10, 000 other neurons.
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Messages travel through the spinal cord at speeds of more than 150 miles per hour.
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Detailed explanation-1: -At birth, a baby’s brain contains 100 billion neurons, roughly as many nerve cells as there are stars in the Milky Way. Before birth, the brain produces trillions more neurons and “synapses” (connections between brain cells) than needed. The synapses are formed as a result of stimulation from the brain’s environment.
Detailed explanation-2: -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-3: -The human brain has often been viewed as outstanding among mammalian brains: the most cognitively able, the largest-than-expected from body size, endowed with an overdeveloped cerebral cortex that represents over 80% of brain mass, and purportedly containing 100 billion neurons and 10× more glial cells.
Detailed explanation-4: -Each neuron has, on average, about 7, 000 synaptic connections with other neurons. That puts the synapse count in the neighborhood of 600 trillion.