Grantyn A, Grantyn R
Arch Ital Biol. 1984 Mar;122(1):59-71.
In this paper we briefly summarize our recent data on the transduction properties of tecto-bulbo-spinal neurons (TBSN) in the cat. These neurons from an important link between the superior colliculus and the "premotor" structures of the brain stem and the cervical spinal cord. They are closely similar to spinal alpha-motoneurons, as concerns the soma-dendritic geometry and electrotonic parameters. In contrast, their rhythmic firing behavior is characterized by much higher sensitivity to depolarizing currents and by the capability ot generate extraspikes ("regenerative firing mode"). This results in an abrupt increase of sensitivity when a certain limit of depolarization is surpassed. Membrane parameters of TBSN which are responsible for their characteristic transduction properties are presented. We forward an hypothesis that different modes of rhythmic firing, as dependent on behavioral situation, play a role in the distribution of efferent signals among many different target areas of TBSNs.
在本文中，我们简要总结了我们最近关于猫中顶盖 - 延髓 - 脊髓神经元（TBSN）转导特性的数据。这些神经元构成了上丘与脑干和颈脊髓的“运动前”结构之间的重要联系。就胞体 - 树突几何形状和电紧张参数而言，它们与脊髓α运动神经元非常相似。相比之下，它们的节律性放电行为的特点是对去极化电流的敏感性高得多，并且能够产生额外的峰电位（“再生放电模式”）。当超过一定的去极化极限时，这会导致敏感性突然增加。本文介绍了负责TBSN特征转导特性的膜参数。我们提出一个假设，即取决于行为情况的不同节律性放电模式，在TBSN的许多不同靶区域之间的传出信号分布中起作用。
