Adeloye A
J Neurosurg. 1976 Sep;45(3):315-20. doi: 10.3171/jns.1976.45.3.0315.
The beaking deformity of the tectum, referred to in this paper as the mesencephalic spur, is regularly present in the Type II variety of the Arnold-Chiari malformation in varying degrees of severity. When the mesencephalic spur is related to associated myelomeningocele, it was found that the more extensive the myelomeningocele, and the older the affected children, the more prominent was the mesencephalic spur.
顶盖的喙状畸形，在本文中称为中脑棘，在Ⅱ型阿诺德-奇亚里畸形中经常出现，严重程度各不相同。当中脑棘与相关的脊髓脊膜膨出有关时，发现脊髓脊膜膨出越广泛，受影响儿童年龄越大，中脑棘就越明显。
