From: Pieter Arend Folkens (
Date: Mon Nov 25 2002 - 00:35:44 EST

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    >im doing a report on echolocation for my biology class . . . My
    >thesis statement is certain areas of the brain should be enlarged to
    >determine dolphin echolocation. . .is this a good assumption or
    >should I change it?

    Not only that, but other areas not used are reduced. Back in the
    1980s a student of mine, Kendal Morris, and I produced an
    illustration for a children's book for National Geographic
    (Dolphins, our friends in the sea) which compared the brains of a
    chimp, a dolphin, and a rabbit with particular areas of the brain
    color-coded, including areas for smell and hearing.

    You have a good assumption. Your statement is a bit awkward though.
    The word 'determine' doesn't seem right here. I would try something
    like: because dolphins use a sophisticated form of bio-sonar, it
    would be expected that certain areas of the brain used for processing
    sound would be enlarged relative to other parts of the brain compared
    with other higher mammals.

    I hope this helps.


    Pieter Folkens


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