摘要
实验在17只氯醛糖全麻,暴露整个小脑的成猫上进行。观察到对声刺激起反应的网状神经无主要位于延髓网状结构上段内侧区,放电区最大空间范围是L1.0～L3.5、P_2～P_(13)、H-6～H-12。放电区内的放电单位显示有一次、二次或三次放电反应;所有反应单位的潜伏时可分为3种,即短(2～5ms)、中(6～50ms)及长(51～110ms)潜伏时,其中中、长潜伏时的反应单位同时显示短或短、中潜伏时放电。结果提示,低位脑干网状结构大部分神经元可能与听觉传递核间有直接或间接的广泛联系,其中短潜伏时放电可能直接来自低位听核(如耳蜗核)的传入。潜伏时分布的离散度较大可能与听觉冲动经网状结构或中枢其它核团间的多突触传递等机制有关。同一单位多次放电反应的特征可能与神经元的环路或链锁状联系有关。
The experiment is carried out in cat with its cerebellum entirly exposed under the anaesthtization of chlorlose. The results show that the great majority of neurons in brainstem reticular formation ( BRF) which could response to sound stimulus mainly located in the upper-medial part of BRF. The largest response area is limited to Ll to L3. 5, P2 to pl3, H-6 to H-12. The response unit shows once, twice and three discharge reaction. Three kinds of latencies, i. e, short ( 2 to 5ms ), middle ( 6 to 50ms ) and long one (51 to 1 loins ) of the unit discharge was found in BRF, among which the response units with middle or long latency showed simultaneously the unit discharge with short or short-middle latency. These results implicated that the majority of neurons in lower BRF may be greatly connected with the auditory relay nucleus directly or indirectly. And the discharge with short and middle latency may come from the impulses of the lower auditory nucleus. The large distribution arrangment of latency may be related to the polysynaptics connection of auditory impulses among BRF or other nucleus of the centre. The feature of the same unit with more discharge might be due to the circular or chain connection of neurons.
出处
《青海医学院学报》
CAS
1990年第2期12-15,共4页
Journal of Qinghai Medical College
关键词
声诱发反应
猫
脑干
网状结构
Cat
Sound evoked response
Brainstem reticular formation
