猫半规管破坏后线性加速度作用下耳石反应特点

本文研究线性加速度作用下,猫半规管阻塞前后前庭-眼动反射、前庭-脊髓反射和姿态平衡的反应特性。发现猫手术前和双侧半规管阻塞后耳石-眼动反应的功率谱和相对增益无显著性差异,脊髓反射H波幅变化在不同加速度刺激下有相似的反应模式。单侧半规管阻塞后,前庭-眼动反射表现明显不对称,H波幅改变与线性加速度无关,反映出半规管功能不对称也引起耳石功能不对称。本文提出潜在性耳石半规管功能不平衡可能是空间前庭功能障碍的重要原因。 

Characteristics of the Otoliths Responses of Cats with Plugged Semicircular Canal Under Linear Acceleration

Responsive characteristics of vestibulo-ocular reflex,vestibulo-spinal reflex and postural equilibrium of cats under linear acceleration,before and after plugged semicircular canal operation were studied.After bilateral canal plugged,no significant changes of power spectra and relative gain of otoliths-ocular reflex were found,and similar responsive patterns of H wave of spinal reflex under different linear acceleration were appeared.After unilateral canal plugged vestibulo-ocular reflex showed a significantly asymmetry and changes of H wave were not related with linear acceleration.It was that asymmetry of canal function impacted significantly on symmetric functions of otoliths.The causes of space vestibular dysfunction were discussed.It was suggested that the potention asymmetry of otoliths and semicircular canal function would be the primary factor of space vestibular dysfunction.