<Journal class="Journal" value="Nature" /> <Page class="#txt" value="597"> <Page-2 class="#txt" value="" /> </Page> <Volume class="#txt" value="175" /> <Year class="Year" value="1955" /> </Reference> <Author class="Author" value="Hebb CO" /> <Author class="Author" value="Hill KJ" /> <Medline class="Medline" value="14370179" /> </Paper>