a structure arising dorsally from a vertebral centrum and enclosing the spinal cord 同义词：vertebral arch,
例句与用法
1.
Diagnosis of spina bifida requires the systematic examination of each neural arch from the cerical to the sacral region both transersely and longitudinally 诊断脊柱裂需要在横切面和纵向上从颈部到骶区进行系统的检查每一个神经弓。
2.
In the transerse scan the normal neural arch appears as a closed circle with an intact skin coering , whereas in spina bifida the arch is " u " shaped and there is an associated bulging meningocele ( thin - walled cyst ) or myelomeningocoele 在横切面上，正常神经弓表现为闭合的环，有完整的皮肤覆盖，然而在脊柱裂，弓变成“ u ”型，有相应的脑膜膨出（薄壁的囊型结构）或脊髓脊膜膨出。
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