Dalmeida R E, Yu J
Acta Neurobiol Exp (Wars). 1981;41(5):509-12.
Adult cats were trained to use a forelimb to open a hinged door against resistance for a food reward. Normal cats performed the task with only toe or wrist motions. Cats with unilateral complete bulbar pyramid section showed persistent deficits in distal limb movements with toe fanning, wrist stiffness and pulling from elbow and shoulder. Partial medial or lateral pyramid lesions produced similar but less severe effects. These results suggest a significant role of the corticospinal system in distal limb movements and a lack of topographical localization of pyramid fibers related to these movements in cats.
成年猫经过训练，能用前肢克服阻力打开一扇铰接门以获取食物奖励。正常猫仅通过脚趾或腕部动作就能完成任务。单侧延髓锥体完全切断的猫在远端肢体运动方面持续存在缺陷，表现为脚趾展开、腕部僵硬以及从肘部和肩部牵拉。锥体部分内侧或外侧损伤产生了类似但程度较轻的影响。这些结果表明皮质脊髓系统在远端肢体运动中起重要作用，且猫中与这些运动相关的锥体纤维缺乏拓扑定位。
