Figure 7.

Selectivity and ramping. a–c, Grand mean PSTH of contra-preferring and ipsi-preferring cells with different ramping directions. Ramping up/down was tested in the preferred direction (Mann–Whitney U test, p < 0.05). Shadow, SEM (bootstrap). d–f, Numbers of neurons with different ramping directions. g–i, Comparison of the absolute value of DA (see Materials and Methods) between the contra and ipsi trials. Mean ± SEM (bootstrap) is shown in the bar graph. All putative pyramidal cells were included. P value is based on bootstrap with 1000 iterations testing a null hypothesis that contralateral DA is lower than ipsilateral DA.