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ShareIn animals, the brain, or encephalon, is the control center of the central nervous system.
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In most animals, the brain is located in the head, protected by the skull and close to the primary sensory apparatus of vision, hearing, taste and olfaction.
In humans, it is an organ of thought.
While all vertebrates have a brain, invertebrates have either a centralized brain or collections of individual ganglia.
Brains can be extremely complex.
For example, the human brain contains more than 100 billion neurons, each linked to as many as 10,000 others.
Most brains exhibit a substantial distinction between grey matter and white matter.
Gray matter consists of the cell bodies of the neurons, while white matter consists of the fibers (axons) that connect neurons.
Many functions are controlled by coordinated activity of the brain and spinal cord.
Moreover, some behaviors such as simple reflexes and basic locomotion, can be executed under spinal cord control alone.
For more information about the topic Brain, read the full article at Wikipedia.org, or see the following related articles:
Nervous system — The nervous system of an animal coordinates the activity of the muscles, monitors the organs, constructs and also stops input from the senses, and ... > read more
Functional neuroimaging — Functional neuroimaging is the use of neuroimaging technology to measure an aspect of brain function, often with a view to understanding the ... > read more
Central nervous system — The central nervous system (CNS) represents the largest part of the nervous system, including the brain and the spinal cord. Together with the ... > read more
Thalamus — The thalamus is a part of the brain. The two thalami are located in the center of the brain, one beneath each cerebral hemisphere and next to the ... > read more
Spinal cord — The spinal cord is a part of the vertebrate nervous system that is enclosed in and protected by the vertebral column (it passes through the spinal ... > read more
Sensory system — A sensory system is a part of the nervous system responsible for processing sensory information. A sensory system consists of sensory receptors, ... > read more
Neural development — The study of neural development draws on both neuroscience and developmental biology to describe the cellular and molecular mechanisms by which ... > read moreEditor's Note: This article is not intended to provide medical advice, diagnosis or treatment.
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