Whether we realize it or not, we think of our brains as computers.
In neuroscience, the metaphor of the brain as a computer has
defined the field for much of the modern era. But as
neuroscientists increasingly reevaluate their assumptions about how
brains work, we need a new metaphor to help us ask better
questions. The computational neuroscientist Daniel Graham offers an
innovative paradigm for understanding the brain. He argues that the
brain is not like a single computer-it is a communication system,
like the internet. Both are networks whose power comes from their
flexibility and reliability. The brain and the internet both must
route signals throughout their systems, requiring protocols to
direct messages from just about any point to any other. But we do
not yet understand how the brain manages the dynamic flow of
information across its entire network. The internet metaphor can
help neuroscience unravel the brain's routing mechanisms by
focusing attention on shared design principles and communication
strategies that emerge from parallel challenges. Highlighting
similarities between brain connectivity and the architecture of the
internet can open new avenues of research and help unlock the
brain's deepest secrets. An Internet in Your Head presents a
clear-eyed and engaging tour of brain science as it stands today
and where the new paradigm might take it next. It offers anyone
with an interest in brains a transformative new way to
conceptualize what goes on inside our heads.
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