Figure 2.

(a) Ipsilateral and (b) Contralateral whisker protraction onset (open bars) and cessation (filled bars) relative to time of contact (t=0) of a forward whisker with an obstacle. Protraction onset times are similar on both sides of the snout, but cessation occurs earlier on the ipsilateral side than on the contralateral side and appears more closely tied to the time of contact (note the pronounced peak ipsilaterally approximately 13 ms after contact). Data are from 22 high-speed video clips recorded with nine different animals.