Kattan K R
AJR Am J Roentgenol. 1979 Jun;132(6):963-5. doi: 10.2214/ajr.132.6.963.
The bipartite superior joint surface and the pseudonotch of the atlas, although well described in anatomic and radiologic literature, may be mistaken for fractures by tomography. The first may appear as a trough on the superior articular surface of the lateral mass of the atlas. The second, the normal tubercle for insertion of the transverse ligament of the atlas, may look like a separate ossicle or a chip fracture.
寰椎的二分上关节面和假切迹，尽管在解剖学和放射学文献中有详尽描述，但在断层扫描中可能被误诊为骨折。前者在寰椎侧块的上关节面上可能表现为一条沟。后者，即寰椎横韧带附着的正常结节，可能看起来像一个单独的小骨块或碎片骨折。
