Krutki Piotr, Mrówczyński Włodzimierz
Department of Neurobiology, University School of Physical Education, 55 Grunwaldzka St., 60-352 Poznań, Poland.
Acta Neurobiol Exp (Wars). 2002;62(4):271-6. doi: 10.55782/ane-2002-1444.
Patterns of afferent connections from receptors of the distal forelimb were investigated in neurones located in C6-C7 segments of the spinal cord with branching axons projecting to the lateral reticular nucleus and the cerebellum. Experiments were made on five adult cats under alpha-chloralose anaesthesia. After antidromic identification, EPSPs and IPSPs were recorded from 22 neurones following stimulation of deep radial, superficial radial, median and ulnar nerves. Both excitatory and inhibitory effects were found in the majority of the cells, however, in 2 cases no synaptic actions were recorded. EPSPs were evoked from group I or II muscle, or cutaneous afferents - mostly monosynaptically. IPSPs from muscle, cutaneous or flexor reflex afferents were mostly polysynaptic. Seven various types of convergence were established in the cells investigated. Significance of parallel transmission of integrated information from various receptors of the distal forelimb to the reticular formation and cerebellum is discussed.
对脊髓C6 - C7节段中轴突分支投射到外侧网状核和小脑的神经元，研究了来自前肢远端感受器的传入连接模式。实验在五只成年猫身上进行，采用α - 氯醛糖麻醉。在进行逆向鉴定后，刺激桡神经深支、桡神经浅支、正中神经和尺神经，记录了22个神经元的兴奋性突触后电位（EPSP）和抑制性突触后电位（IPSP）。在大多数细胞中都发现了兴奋和抑制作用，然而，有2例未记录到突触活动。EPSP由I或II类肌肉或皮肤传入纤维诱发，大多为单突触。来自肌肉、皮肤或屈肌反射传入纤维的IPSP大多为多突触。在所研究的细胞中确定了七种不同类型的汇聚。讨论了从远端前肢的各种感受器到网状结构和小脑的整合信息平行传递的意义。
