We tested the hypothesis that the premotor cortex (PMC) in the cat contributes to the planning and execution of visually guided gait modifications. We analyzed single unit activity from 136 cells localized within layer V of cytoarchitectonic areas 6iffu and that part of 4δ within the ventral bank of the cruciate sulcus while cats walked on a treadmill and stepped over an obstacle that advanced toward them. We found a rich variety of discharge patterns, ranging from limb-independent cells that discharged several steps in front of the obstacle to step-related cells that discharged either during steps over the obstacle or in the steps leading up to that step. We propose that this population of task-related cells within this region of the PMC contributes to the temporal evolution of a planning process that transforms global information of the presence of an obstacle into the precise spatio-temporal limb adjustment required to negotiate that obstacle.

中文翻译：

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运动前皮层为步态调整计划中的信息的时间转换提供了基础。

我们测试了猫中的运动前皮层（PMC）有助于视觉引导步态调整的计划和执行的假设。我们分析了136个细胞的单个单位活动，这些细胞位于细胞结构区域6iffu的V层和十字槽腹侧腹中的4δ部分，而猫则在跑步机上行走并越过了向它们前进的障碍物。我们发现了各种各样的放电模式，范围从与肢体无关的细胞放电到障碍物前面几步，再到与脚步相关的细胞，这些细胞在障碍物上方的台阶中或直至障碍物的台阶中放电。