Szulczyk A, Szulczyk P, Zywuszko B
Department of Physiology, Medical School Warsaw, Poland.
Brain Res. 1988 Apr 26;447(1):109-15. doi: 10.1016/0006-8993(88)90970-5.
Electrical stimulation of the phrenic nerve afferents evoked excitatory responses in the right inferior cardiac sympathetic nerve in chloralose-anaesthetized cats. The reflex was recorded in intact and spinal cats. The latency and threshold of the volley recorded from the phrenic nerve as well as of the cord dorsum potentials evoked by electrical stimulation of the phrenic nerve indicated that group III afferents were responsible for this reflex. The phrenicocardiac sympathetic reflex recorded in intact cats was followed by a silent period. The maximum amplitude of the reflex discharges was 800 microV, the latency was 83 ms and the central transmission time 53 ms. Duration of the silent period lasted up to 0.83 s. In spinal cats the reflex was recorded 5.5-8 h after spinalization. The maximum amplitude of the spinal reflex discharges ranged from 22 to 91 microV and the latency from 36 to 66 ms.
在水合氯醛麻醉的猫中，电刺激膈神经传入纤维可诱发右下心脏交感神经的兴奋性反应。该反射在完整猫和脊髓猫中均有记录。从膈神经记录的冲动以及电刺激膈神经诱发的脊髓背电位的潜伏期和阈值表明，Ⅲ类传入纤维介导了该反射。完整猫中记录到的膈心交感反射之后有一个静息期。反射放电的最大幅度为800微伏，潜伏期为83毫秒，中枢传导时间为53毫秒。静息期持续长达0.83秒。在脊髓猫中，脊髓损伤后5.5 - 8小时记录到该反射。脊髓反射放电的最大幅度在22至91微伏之间，潜伏期在36至66毫秒之间。
