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  • In Biology

    September 11,2016

    Brain Recording Techniques

    The earliest brain recordings — electroencephalograms, or EEGs — used surface electrodes on the scalp to record ongoing brain potentials from larg...

  • In Biology

    September 11,2016

    Non-Neuronal Cells: Glial Cells

    Although the figure of 100 billion neurons in the brain is certainly impressive, within that same volume are at least ten times as many non-neuronal c...

  • In Biology

    September 11,2016

    Moving Around with Motor Neurons

    Neurons originally evolved to coordinate muscle activity. Large, multi-celled animals can only move efficiently if muscles throughout the animal move...

  • In Biology

    September 11,2016

    Technology Used to Image the Brain

    On the physiological front, electroencephalographic (EEG) recordings in the early 20th century revealed that the brain was constantly producing electr...