枕状的

Objective General evaluation of the degree of exposure and damage to the cerebellopontine angle region by the postlabyrithine approach and suboccipital retrosigmoid approach, being familiar with anatomic structure of this region and providing theory reference for the choice of the clinical operative approach.

方法在显微镜下对5例(10侧)国人成人头颅灌注湿性标本进行模拟经迷路后入路和经枕下乙状窦后入路的手术操作，观察区域解剖结构、按Ammirat标准进行评价两种入路对桥小脑角区的显露程度，测量并用Horgan法计算出显露面积，并按损伤程度的评分评价两入路对桥小脑角区的损伤程度。

Methods Suboccipital approach was applied and the diameter of Labbe veins was microanatomy measured in 10 adult cadaver heads after vascular perfusion. Results The main types of Labbe vein were single, doubles, candlestick and venous sinus or multiples.

对10具（20侧）经福尔马林溶液固定的不同性别的成人头颅湿性标本进行血管灌注染色，然后行颞下－乙状窦后－枕下联合开颅，对Labbe静脉进行显微解剖测量。

Supraperiosteal dissection was performed extending from the glabella anteriorly to the posterior lip of the foramen magnum posteriorly. craniotomies were performed to separate the bifrontal and biparietal-occipital frangments.

患儿采取改良的俯卧位，通过头皮冠状切口显露从眉间至枕骨大孔后唇的整个颅盖，切开颅骨分离双侧额骨和双侧顶-枕部骨块。

The guitar is able to intonate in this radical tuning by slanting all the frets and the nut, and allowing each string its own bridge; and thus its own scale length.

在这个调弦里，吉他的品丝及弦枕要调成斜状，每根弦都有自身的琴桥及自身的音阶弦长。

The anterior border of the sigmoid sinus corresponds to the line connecting the mastoid tip with the junction of temporo-squamosal -parietomastoid sutures, and its posterior border to the line connecting the mastoid tip with O point.

通过体表可扪及的外耳道上棘、乳突尖和枕外窿突，可对横窦、乙状窦边界进行体表定位，最大限度避免损伤静脉窦，使入路设计更为安全，术中视野更为开阔。

Patchy hyperdensities are present in both occipital lobes and in the precentral and frontal subcortical white matter.

图2。 MRI 的T2像于双侧枕叶、中央前回及额叶的皮质下白质见斑片状高信号病灶。

The trilobed structure of the brain, lying posterior to the pons and medulla oblongata and inferior to the occipital lobes of the cerebral hemispheres, that is responsible for the regulation and coordination of complex voluntary muscular movement as well as the maintenance of posture and balance.

小脑脑的三裂叶状组织，位于脑桥和延髓之后脑半球的枕叶下面，负责调节和协调复杂的自发肌肉运动，同时负责保持身体姿势的平衡注意，注意力集中

The trilobed structure of the brain,lying posterior to the pons and medulla oblongata and inferior to the occipital lobes of the cerebral hemisphere s,that is responsible for the regulation and coordination of complex voluntary muscular movement as well as the maintenance of posture and balance.

小脑脑的三裂叶状组织，位于脑桥和延髓之后脑半球的枕叶下面，负责调节和协调复杂的自发肌肉运动，同时负责保持身体姿势的平衡

Methods:The depth of the anterior and posterior rims of foramen magnum and the angle between medulla oblongata and upper spinal cord on midsagittal SE or FSE T1WI were measured in 320normal Chinese individuals and in 36patients with basilar impression.

随机选取320例没有颅颈交界区相关的临床症状及体症，MRI扫描无明显颅骨破坏性病变和颅颈交界区畸形的正常国人和36例颅底凹陷症患者的颅脑MRI图像，于正中矢状面SE或FSE T_1WI图像上测量枕大孔前、后缘中点深度和延髓-上颈髓轴线夹角数值。正常人按性别、年龄分16组，每组20例。

Purpose:To determine the normal ranges of the depth of the anterior and posterior rims of foramen occipital magnum and the angle between medulla oblongata and the upper spinal cord on midsagittal MRI in normal Chinese idividuals and patients with basilar impression,to study their clinical significance and to provide normal reference in diagnosing basilar invagination by MRI.

目的：利用颅脑正中矢状面MRI自旋回波或快速自旋回波T_1WI图像测量颅颈交界区正常的中国人和颅底凹陷症患者枕大孔前、后缘中点深度和延髓-上颈髓轴线夹角数值，评价其正常值范围，探讨其发育规律及临床意义，为MRI诊断颅底凹陷症提供直接的参考标准。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。