Brain

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brain : the portion of the vertebrate central nervous system enclosed in the skull and continuous with the spinal cord through the foramen magnum that is composed of neurons and supporting and nutritive structures (as glia) and that integrates sensory information from inside and outside the body in controlling autonomic function (as heartbeat and respiration), in coordinating and directing correlated motor responses, and in the process of learning — Webster

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Brain The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals. The brain is located in the head, usually close to the sensory organs for senses such as vision. The brain is the most complex organ in a vertebrate’s body. In a human, the cerebral cortex contains approximately 15–33 billion neurons, each connected by synapses to several thousand other neurons. These neurons communicate with one another by means of long protoplasmic fibers called axons, which carry trains of signal pulses called action potentials to distant parts of the brain or body targeting specific recipient cells. — Wikipedia

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Scientific American: Mind & Brain Science news and technology updates from Scientific American


  • The dopamine motive system: implications for drug...
    by Nora D. Volkow on November 16, 2017 at 12:00 am

    The dopamine motive system: implications for drug and food addictionThe dopamine motive system: implications for drug and food addiction, Published online: 16 November 2017; doi:10.1038/nrn.2017.130The dopamine motive system, which integrates reinforcement and motivation, is influenced by obesogenic foods and addictive drugs. In this Review, Volkow and colleagues highlight how these stimuli sensitize the subject's motivation towards them while desensitizing the subject's motivation towards […]

  • Visual processing: Silent motion detectors
    by Natasha Bray on November 16, 2017 at 12:00 am

    Visual processing: Silent motion detectorsVisual processing: Silent motion detectors, Published online: 16 November 2017; doi:10.1038/nrn.2017.146 […]

  • The nano-architecture of the axonal cytoskeleton
    by Christophe Leterrier on November 16, 2017 at 12:00 am

    The nano-architecture of the axonal cytoskeletonThe nano-architecture of the axonal cytoskeleton, Published online: 16 November 2017; doi:10.1038/nrn.2017.147 […]

  • Regenerating CNS myelin — from mechanisms to...
    by Robin J. M. Franklin on November 16, 2017 at 12:00 am

    Regenerating CNS myelin — from mechanisms to experimental medicinesRegenerating CNS myelin — from mechanisms to experimental medicines, Published online: 16 November 2017; doi:10.1038/nrn.2017.136Promoting remyelination may be an effective therapeutic strategy for various disorders that are characterized by a loss of myelin, including multiple sclerosis. In this Review, Franklin and ffrench-Constant discuss recent developments in our understanding of remyelination and the efforts […]

  • Neural circuits: Shock signals
    by Natasha Bray on November 9, 2017 at 12:00 am

    Neural circuits: Shock signalsNeural circuits: Shock signals, Published online: 09 November 2017; doi:10.1038/nrn.2017.145In fear conditioning in mice, neurons in the lateral central amygdala that express protein kinase Cδ convey the unconditioned stimulus to the lateral amygdala to enable the encoding of aversive memory. […]