--------Past Studies--------------------
3.
Single cellular recordings
from the spots revealed the visual features represented by these spots.
Spots A and B represent 'protrusions'
and 'curved contour', respectively. The simplest visual feature for spot
D was 'a rectangle'. Since
'an ellipse' also activates the spots, the visual feature essential for the
spots seems to be 'an elongated structure'. Though 'a rectangle' also activated
spot C, but there was no activation
by 'an ellipse'. A 'circle' inhibited
activity in the spot. Thus, the essential feature for spot C is the 'elongated structure' without
rounded contours. The pictures represent visual stimuli and the histograms,
neuronal activity elicited by them. Horizontal axis, time; horizontal bar,
period for stimuli presentation; vertical axis, firing rate of the cells.
