p151fig04.29 Experimental evidence of bipole cells in cortical area V2 was reported by Von der Heydt, Peterhans, and Baumgarter (1984).<BR>|| Bipoles: first neurophysiological evidence (V2) (von der Heydt, Peterhans, Baumgartner 1984, Peterhans, von der Heydt 1988). (Grossberg 1984) prediction.<TABLE border="1"><TR><TD><B>Ordering:</b><BR>Stimulus (S)<BR>probe location *</td><TD>cells in V2<BR><B>response?</td></tr><TR><TD>...(S)*...</td><TD>YES</td></tr><TR><TD>...*...(S)</td><TD>NO</td></tr><TR><TD>(S)...*...</td><TD>NO</td></tr><TR><TD>(S)...*...(S)</td><TD>YES</td></tr><TR><TD><B>(S)</b>...*...<BR>(more contrast)</td><TD>NO</td></tr><TR><TD>(S)...*.....(S)</td><TD>YES</td></tr></table>Evidence for receptive field.