Figure 5.

Unilateral lesion of area 5 causes asymmetric loss of memory in the two hindlegs. A, Scatter plots showing the maximum toe high versus pause duration in the contralateral (left leg) and ipsilateral (right leg) before (open circles) and after (filled circles) a lesion of area 5 in the right hemisphere. Note the obvious difference in maximum toe heights before and after the lesion in the contralateral leg (top scatter plot) and the relatively small effect of the lesion on toe heights in the ipsilateral leg (bottom scatter plot). B, Bar plots showing means of maximum toe heights in the legs contralateral and ipsilateral to the lesion before (pre) and after (post) the lesion when the animal was paused for periods ranging from 10 to 40 s. Note that the lesion caused a significant (*) memory loss in both legs, with the loss in the contralateral leg being larger. Error bars are SDs, and the number of trials for each condition ranged from 22 to 28.