脊髓径 lateral corticospinal tract
小脑脊髓径 cerebellospinal tract
顶盖脊髓径 tectospinal tract
内侧前庭脊髓径 medial vestibulospinal tract
前庭脊髓径 vestibulospinal tract ; Tractus vestibulospinalis
前皮质脊髓径 anterior corticospinal tract
四叠体脊髓径 Tectospinal tract
网状脊髓径 reticulospinal tract
丘脑脊髓径 Tractus thalamospinalis
红核脊髓径 rubrospinal tract
枕大孔水平脊髓前后径及斜径角较正常对照组为小，但枕大孔前后径无明显差别。
Although the spinal foramen magnum anteriorposterior diameter was smaller but not statistically different from the control.
影像学检查：椎管矢状径增加，椎管横截面面积明显扩大，脊髓膨隆良好。
Radiologic Results:sagittal diameter of vertebral canal and trans. sec. area increased and spinal cord were well than preoperative status.
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