Poliakova L A, Velumian A A
Zh Evol Biokhim Fiziol. 1991 Jul-Aug;27(4):496-502.
A comparative HRP study of formation of connections between primary sensory nerve fibers and motoneurones in brachial and lumbosacral cord segments has been made on chick embryos between the 6.5th and 10th days of incubation. HRP was applied to the cut ends of the appropriate nerves via suction pipettes on isolated superfused spinal cord preparation. The first contacts between primary sensory collaterals and motoneuronal dendrites were found to appear both in lumbosacral and branchial cord segments at the same stage, i.e. at the 7.5-8th days of development. This observation does not confirm the widely accepted belief on rostrocaudal sequence of development of the spinal cord, indicating that exceptions from this developmental gradient are quite possible.
对孵化第6.5至10天的鸡胚，进行了一项关于臂部和腰骶部脊髓节段中初级感觉神经纤维与运动神经元之间连接形成的比较辣根过氧化物酶（HRP）研究。在分离的灌注脊髓标本上，通过吸管将HRP应用于相应神经的断端。发现初级感觉侧支与运动神经元树突之间的首次接触在腰骶部和臂部脊髓节段的同一阶段出现，即发育的第7.5至8天。这一观察结果不支持关于脊髓发育头尾顺序的广泛接受的观点，表明这种发育梯度存在例外情况是很有可能的。
