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  • Title: Sexual difference in pattern of hormone accumulation in the brain of a songbird.
    Author: Arnold AP, Saltiel A.
    Journal: Science; 1979 Aug 17; 205(4407):702-5. PubMed ID: 17781261.
    Abstract:
    After adult zebra finches (Poephila guttata) received injections of tritiated testosterone, fewer hormone-concentrating cells were found in females than in males in two brain regions involved in song: hyperstriatum ventrale pars caudale and magnocellular nucleus of the anterior neostriatum. In some other regions, no sexual difference was detected. It is, therefore, possible that sex differences in the sensitivity of specific neural populations to hormones underlie the striking anatomical dimorphism observed in neural regions controlling song.
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