How Many Neurons Are There In The Human Brain?
One of the most remarkable aspects of the adult nervous system is the human brain. The human brain controls memory, vision, learning, thought, consciousness and other activities. By means of electrochemical impulses the brain directly controls conscious or voluntary behavior. It also monitors, through feedback circuitry, most involuntary behavior and influences automatic activities of the internal organs.
During fetal development the foundations of the mind are laid as billions of neurons form appropriate connections and patterns. No aspect of this complicated structure has been left to chance. The basic wiring plan is encoded in the genes. 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 brain’s billions of neurons connect with one another in complex networks. All physical and mental functioning depends on the establishment and maintenance of neuron networks. 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. When a person stops performing an activity, the neural networks for the activity fall into disuse and eventually may disappear.
Differences in weight and size of a person’s brain does not correlate with differences in mental ability. The adult human brain normally weighs from 1.0 to 1.5 kg (2¼ to 3¼ lbs).
The work of the brain is similar to a combination of a computer and a chemical factory. So take good care of your PC!
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Tags: biology, brain, Health, Human Body, neurons
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