Maynard C W, Leonard R B, Coulter J D, Coggeshall R E
J Comp Neurol. 1977 Apr 15;172(4):601-8. doi: 10.1002/cne.901720404.
To study the central connections of ventral root afferents, horseradish peroxidase was injected into the lumbosacral spinal cord of the cat and the appropriate dorsal root ganglia were examined from segments with (1) both dorsal and ventral roots intact, (2) both roots sectioned, and (3) only the dorsal root sectioned. The key finding was that a number of labeled cells (up to 133) were observed in the ganglion after dorsal rhizotomy. We interpret these findings to mean that the central processes of the labeled cells projected to the spinal cord through the ventral root. As expected, when both roots were cut, almost no cells were labeled and when both roots were intact, there were large numbers of labeled cells. Of the labeled cells observed in ganglia after dorsal rhizotomy, all were found to be within the ganglion itself. No labeled aberrant dorsal root ganglion cells could be found.
为研究腹根传入纤维的中枢联系，将辣根过氧化物酶注入猫的腰骶脊髓，并从以下几种情况的节段检查相应的背根神经节：（1）背根和腹根均完整；（2）两根均切断；（3）仅切断背根。关键发现是在背根切断后，神经节中观察到一些标记细胞（多达133个）。我们将这些发现解释为标记细胞的中枢突通过腹根投射到脊髓。正如预期的那样，当两根都切断时，几乎没有细胞被标记；当两根都完整时，有大量标记细胞。在背根切断后神经节中观察到的标记细胞，均位于神经节本身内。未发现标记的异常背根神经节细胞。
