Description of adult human brain

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The human brain is the central organ of the human nervous systemand with the spinal cord makes up the central nervous system. The brain consists of the cerebrumthe brainstem and the cerebellum. It controls most of the activities of the bodyprocessing, integrating, and coordinating the information it receives from the sense organsand making decisions as to the instructions sent to the rest of the body.

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Explore the latest dataset and taxonomy of mouse cell types. SMART-seq analysis of 75, cells across the entire cortex and hippocampus. Explore the latest dataset and taxonomy of human cell types.

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The human brain is an amazing organ, capable of surprising feats of memory, susceptible to damage, and yet remarkably adaptable to change. It does so much but what is the actual size of the brain? While the human brain has a structure similar to that of other mammals, what makes it so very different is its size in relation to body size.

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After all, we ourselves remained skeptical of what we were seeing throughout our investigation. The birth of new neurons in human memory circuits, in other words, declines during childhood to undetectable levels in the adult. Our research findings sparked healthy debate because for about 20 years, brain scientists have thought that neurons continue to be born in the adult human hippocampus.

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Most of our knowledge on human CNS circuitry and related disorders originates from model organisms. How well such data translate to the human CNS remains largely to be determined. Human brain slice cultures derived from neurosurgical resections may offer novel avenues to approach this translational gap.

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The observation that the human brain churns out new neurons throughout life is one of the biggest neuroscience discoveries of the past 20 years. In nonhuman animals the continued production of new neurons has been linked to improved learning and memory, and possibly even mood regulation. But new findings in humans, reported online in Nature on Wednesday, pump the brakes on this idea.

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The human brain is the command center for the human nervous system. It receives signals from the body's sensory organs and outputs information to the muscles. The human brain has the same basic structure as other mammal brains but is larger in relation to body size than any other brains.

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Download this glossary PDF. It is associated with neurons passing electrochemical messages down the axonreleasing neurotransmitters to neighboring cells in the synapse. They receive signals from the brain and secrete several different hormones in response, including cortisol and adrenaline.

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The gray matter is made up of about billion neurons that gather and transmit signals while the white matter is made of dendrites and axons that the neurons use to transmit signals. Humans have the largest brain to body ratio of any animal, and the blood vessels in the brain, if stretched end-to-end, would be aboutmiles long. Brain development begins very early in the life of a fetus.

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A brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. It is located in the headusually close to the sensory organs for senses such as vision. It is the most complex organ in a vertebrate's body. In a human, the cerebral cortex contains approximately 14—16 billion neurons[1] and the estimated number of neurons in the cerebellum is 55—70 billion.


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