CLIMBING FIBER RESPONSES EVOKED IN LOBULE VII OF THE POSTERIOR CEREBELLUM FROM A VAGAL NERVE IN RABBITS
CLIMBING FIBER RESPONSES EVOKED IN LOBULE VII OF THE POSTERIOR CEREBELLUM FROM A VAGAL NERVE IN RABBITS
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DOI：
10.1016/0168-0102(91)90113-d
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发表时间：
1991-10-01
影响因子：
2.9
通讯作者：
NISIMARU, N
中科院分区：
文献类型：
--
作者：
OKAHARA, K;NISIMARU, N
本文用电生理技术观察了去大脑家兔迷走神经向小脑后叶的投射。电刺激颈区迷走神经可引起双侧后蚓部皮质从第六小叶到第八小叶的场电位反应。最突出的电位出现在同侧VIIa小叶内侧蚓部。这些电位的潜伏期为15.6 ms，在分子层为负，在颗粒层为正。在20 Hz的刺激速率下，它们的振幅降低了1 Hz时对照值的70%。叠加在这些场电位上。在浦肯野细胞层的深处记录到单一的复合尖峰。这些结果表明，第七小叶的内侧蚓部皮层通过攀爬纤维接收迷走神经传入信号，推测其传递心血管信息。
The vagal afferent projection to the cerebellar posterior lobe was examined in decerebrate rabbits with electrophYsiological techniques. Electrical stimulation of a vagal nerve at the cervical region evoked field potential responses on both sides of the posterior vermal cortex from lobule VI to VIII. The most prominent potentials appeared in the ipsilateral medial vermis of lobule VIIa. These potentials had a latency of 15.6 ms, and were negative in the molecular layer and positive in the granular layer. At a stimulation rate of 20 Hz, their amplitude was reduced by 70% of the control value at 1 Hz. Superimposed on these field potentials. unitary complex spikes were recorded at the depths of Purkinje cell layers. These results indicate that the medial vermal cortex of lobule VII receives vagal afferent signals via climbing fibers, which presumably convey cardiovascular information.