Skinner R D, Remmel R S, Minor L B
Exp Neurol. 1984 Dec;86(3):462-72. doi: 10.1016/0014-4886(84)90081-5.
In decerebrate cats long descending propriospinal (LDP) neurons were recorded extracellularly in the cervical enlargement. They were identified antidromically by spinal cord stimulation at the L1-L2 level. Inputs to these cells were tested by stimulating the medial longitudinal fasciculus (MLF) 5 to 6 mm rostral to the obex, the lateral vestibular nucleus (LVN), the upper MLF 1 mm caudal to the trochlear nucleus, and the medial vestibular nucleus (MVN), all on the ipsilateral side. Action potentials were elicited in 44% (64/144) of LDP neurons in the ventral horn (laminae VII, VIII) at a segmental latency of 1 ms or less following brain stem stimulation. This was considered to be a monosynaptic latency. The most effective stimulation sites were the MLF and the LVN. MLF stimulation accounted for about two-thirds of the monosynaptically elicited action potentials and LVN for about one-third. Another 22% of LDP neurons responded at longer latencies, but some of those responses may also have been monosynaptic. Stimulation of the upper MLF and the MVN were much less effective, indicating that the MLF input was predominantly from fibers originating in the medullary and/or pontine reticular formation.
在去大脑猫中，在颈膨大处细胞外记录到长下行脊髓固有（LDP）神经元。通过在L1 - L2水平刺激脊髓对其进行逆向鉴定。通过刺激闩前方5至6毫米处的内侧纵束（MLF）、外侧前庭核（LVN）、滑车神经核尾侧1毫米处的上部MLF以及内侧前庭核（MVN）来测试这些细胞的输入，所有刺激均在同侧进行。在脑干刺激后，腹角（VII、VIII层）中44%（64/144）的LDP神经元在1毫秒或更短的节段潜伏期引发动作电位。这被认为是单突触潜伏期。最有效的刺激部位是MLF和LVN。MLF刺激约占单突触引发动作电位的三分之二，LVN刺激约占三分之一。另外22%的LDP神经元在较长潜伏期有反应，但其中一些反应也可能是单突触的。刺激上部MLF和MVN的效果要差得多，这表明MLF输入主要来自起源于延髓和/或脑桥网状结构的纤维。
