Ross G W, Swanson S A, Perentes E, Urich H
Department of Pathology, University of Virginia School of Medicine, Charlottesville 22908.
J Neurol Neurosurg Psychiatry. 1988 Sep;51(9):1231-4. doi: 10.1136/jnnp.51.9.1231.
The connections of an ectopic midline spinal ganglion associated with an asymptomatic sacral diastematomyelia were studied. The ganglion was intercalated in the ventral root of one hemicord and sent its efferents to the dorsal root of the other hemicord. The afferents joined the anterior root to form a midline intradural spinal nerve in the cauda equina. Islands of ectopic glia were present in both roots and the spinal nerve. Both the midline position of the ganglion and the glial heterotopias can be tentatively explained by the failure of incorporation of the dorsal cell wedge ("Zwischenstrang") into the divided neural tube.
对与无症状性骶部脊髓纵裂相关的异位中线脊髓神经节的连接进行了研究。该神经节插在一侧脊髓半侧的腹根中，并将其传出纤维发送至另一侧脊髓半侧的背根。传入纤维加入前根，在马尾形成一条中线硬脊膜内脊髓神经。在两根及脊髓神经中均存在异位神经胶质岛。神经节的中线位置和神经胶质异位现象都可以暂时用背侧细胞楔（“Zwischenstrang”）未能并入分裂的神经管来解释。
