Things being equated are "important" or "epic" (like And as conscious beings we like toįind patterns, and we find equivalencies interesting, especially when the The two gives people a sense of enormity. Of stars in the Milky Way or the number of neurons in the human brain, equating
Number of football fields, mass as number of fully-loaded 747s, energy in termsĮven though we can't conceive of the number That's why journalists report distances as The work of the brain is similar to a combination of a computer and a chemical factory.Communicators like to use because giving people a sense of scale when it comes The adult human brain normally weighs from 1.0 to 1.5 kg (2¼ to 3¼ lbs). When a person stops performing an activity, the neural networks for the activity fall into disuse and eventually may disappear.ĭifferences in weight and size of a person's brain does not correlate with differences in mental ability. A person's habits and skills - such as nail-biting or playing a musical instrument - become embedded within the brain in frequently activated neuron networks. All physical and mental functioning depends on the establishment and maintenance of neuron networks. The brain's billions of neurons connect with one another in complex networks. It has been shown from previous studies that in developing embryos of animals, nerve cells are created in or travel to designated regions of the brain, and once in place send out axons along preprogrammed paths to make contact with specific targets. The basic wiring plan is encoded in the genes. No aspect of this complicated structure has been left to chance. It also monitors, through feedback circuitry, most involuntary behavior and influences automatic activities of the internal organs.ĭuring fetal development the foundations of the mind are laid as billions of neurons form appropriate connections and patterns. By means of electrochemical impulses the brain directly controls conscious or voluntary behavior.
The human brain controls memory, vision, learning, thought, consciousness and other activities. One of the most remarkable aspects of the adult nervous system is the human brain. "An adult human brain has more than 100 billion neurons" The Scientific American Book of the Brain. "The human brain holds about 100 billion nerve cells."
"It has been estimated that the adult brain has around one hundred billion neurons and an even larger number of glial cells." "The human brain has from 10 billion to 100 billion neurons." "Weighing around three pounds (1.35kg), the brain contains nearly 100 billion cells."
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