What bone is number 8?

Question

What bone  is number 8?

BlackTom AI · Accepted Answer

To determine which bone is labeled as number 8 in this axial brain CT image, I’ll evaluate what each option represents and where these bones are typically located in standard skull anatomy.

Option 1: ethmoid. The ethmoid bone forms part of the anterior cranial fossa and the orbital walls; it is a small midline bone located more anteriorly between the eyes. If label 8 were pointing toward the front of the skull near the nasal or orbital region, this might be relevant, but in an axial image centered on the brainstem and cerebellum, the ethmoid would not be expected at the posterior skull base region.

Option 2: maxilla. The maxilla is a facial bone forming the upper jaw and part of the orbital floor and nasal aperture. It is located anteriorly and laterally in the face, not at the skull base or near the posterior occipital area. Therefore, a label near the midline posterior cranial fossa is unlikely to correspond to the maxilla.

Option 3: sphenoid. The sphenoid bone is a central skull base bone that spans the middle cranial fossa and connects many skull regions. On axial views, parts of the sphenoid can appear near the central skull base, but its typical appearance is more anterior-middle rather than strictly posterior-inferior in the region shown by a label around the foramen magnum area. If label 8 were near the central skull base, the sphenoid would be a possibility, but the image region suggested by label 8 aligns more with the posterior skull.

Option 4: occipital. The occipital bone forms the posterior aspect of the skull and the posterior cranial fossa, surrounding the cerebellum and the foramen magnum. In axial CT slices that include the lower brainstem and cerebellum, labels placed toward the very back and bottom of the skull commonly correspond to the occipital bone.

Taking into account the location of label 8 on this axial slice—toward the posterior inferior skull where the cerebellum and foramen magnum lie—the bone most consistent with that position is the one forming the posterior skull base. Among the options, this description best matches the occipital bone.

What bone is number 8? 单项选择题

类似问题

1: 20 2: 21 3: 22 4: 23 5: 24 6: 25 7: 26 8: 27 9: 28 10: 29 11: 30

Please name the bone or feature of bone pictured below in GREEN:

Match the following features with the appropriate bones they are associated with 1: Styloid Process 2: Foramen Magnum 3: Nasal Septum 4: Optic Canal 5: Hard Palate 6: Teeth

You own a bond that pays $64 in interest annually. The face value is $1,000 and the current market price is $1,021.61. The bond matures in 11 years. What is the yield to maturity?

Which of the following statements is CORRECT?

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单