Shupliakov O V
Sechenov Institute of Evolutionary Physiology and Biochemistry, Academy of Sciences of the USSR, Leningrad.
Acta Biol Hung. 1988;39(2-3):127-34.
The relationship between dorsal root afferents and lumbar motoneurons has been studied in the isolated spinal cord of Rana ridibunda tadpoles. It was found that primary afferents do not form direct contacts with "primary" motoneurons innervating the axial musculature used by the larvae in swimming. Monosynaptic connections were revealed only between afferent fibres and lateral motor column motoneurons which innervate the developing hindlimb. The transmission in these synapses was dual: electrical and chemical. During the metamorphic stages when the locomotion is gradually taken over by the developing hindlimbs, an increase of the percentage of motoneurons receiving direct synaptic input from the primary afferents was observed.
在泽蛙蝌蚪的离体脊髓中，研究了背根传入神经与腰运动神经元之间的关系。结果发现，初级传入神经与支配幼虫游泳时使用的轴向肌肉的“初级”运动神经元不形成直接接触。仅在传入纤维与支配发育中的后肢的外侧运动柱运动神经元之间发现了单突触连接。这些突触中的传递是双重的：电传递和化学传递。在变态阶段，当运动逐渐由发育中的后肢接管时，观察到接受初级传入神经直接突触输入的运动神经元百分比增加。
