单侧前庭神经切断后猫运动方式的改变和补偿

本工作首次将一种运动分析系统，即视觉自动电视摄相信息处理系统（ｏｐｔｉｃａｌａｕｔｏｍａｔｉｃＴＶ－ｉｍａｇｅｐｒｏｃｅｓｓｏｒ，Ｅ．Ｌ．Ｉ．Ｔ．Ｅｓｙｓｔｅｍ）用于动物运动方式的定量分析，比较了猫一侧前庭神经切断前后在跨越转动横梁测试中运动方式的变化。结果如下：在横梁静止条件下，猫述后行走的初始身高明显下降，步距变短，步 频降低，呈缓慢的蹒中山步态，继而各参量逐渐增加，分别在术后４５和７０ｄ恢复

CHANGES AND COMPENSATION IN THE LOCOMOTOR PATTERN OF UMLATEAL VESTIBULAR NEURECTOMIZED CATS

In the present study the locomotor activity of unilateral vestibular neurectomizedcatS while crossing over a rotating beam along its longitudinal axis at different speedswas investigated. The kinematics of the body movement was recorded by means of amotion analysis system, with an optical automatic TV-image processor (E. L. I. T. Esystem) allowing a computer reconstruction of the 3 dimensional motion. Analysis wasfocused 0n the locomotion pattern as defined by several Parameters including steplength, step frequency and velocity, and an estimate of the height of the body gravitycenter. The results obtained with non-rotating beam showed that unilateral vestibularneurectomy induced significant changes in locomotor activity of the lesioned cats. Animals crossed over the beam with very slow locomotion speed and they typically exhibited a strong reduction in step length associated with a decrease in frequency. In addition, the gravity center of the walking cats was lower than the normal. The analysisPerformed with the rotuting beam revealed different strategies of compensation, withcatS moving either faster or slower as compared to their preoperative Per formance.Such strategies in locomotion speed regulation avoided falling from the rotuting beam.Recovery to a nearly normal locomotor pattern was observed thereafter with a time delay comparable to that found in other behavioral studies dealing with the vestibular comPensation process in the cat.