Polar histograms of the direction of poststimulus force responses in the horizontal (x–y) plane. Left: distribution of force responses from side ipsilateral to the stimulus site, with 0° medial and 270° posterior, shown as if the ipsilateral side were always on the left. Ipsilateral force responses were primarily directed medially and posteriorly, P < 0.001. Right: distribution of force responses contralateral to stimulus site, with 0° lateral and 90° anterior, shown as if the contralateral side were always on the right. Contralateral force responses were primarily directed laterally and anteriorly, P < 0.001.