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This is true if you do have a hard disk of 20GB, but the human memory is large enough. You might have only a few gigabytes of storage space, similar to the space in an iPod or a USB flash drive. Yet neurons combine so that each one helps with many memories at a time, exponentially increasing the brain's memory storage capacity to something closer to ...


Memories are generally understood to be encoded within networks of neurons, and not within neurons themselves. New neurons are certainly useful, but they are not necessary to store new memories. Indeed, the hippocampus is extremely plastic, meaning that the connection strength between different neurons can change rapidly, and sometimes, new connections are ...

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