枕侧

Of the 19 cases,19 fetus were found,MRI confirmed 14 cases considered or suspected as fetal corpus callosum agenesis by US(8 cases are completed agenesis of corpus collosom-CACC,6 cases are partial agenesis of corpus collosom-PACC, and 5 cases had took on autopsy),however 3 cases are mild enlargement of lateral cerebral ventricle and 2 cases are leukodystrophy.In these cases,MRI confirmed a Dandy-Walker syndrome and a lipoma of corpus callosum suspected by US,detect a Dandy-Walker syndrome and a microcephalus made missed diagnoses by US.The fetal corpus callosum and additional cerebral anomalies were shown more clearly on MR T_2-weighted images.

胎儿胼胝体长度与额枕径的比值在24～36孕龄阶段相对较恒定。2、19例孕妇共检出胎儿19个，MRI证实超声疑诊的胎儿胼胝体发育不全14例(完全型胼胝体发育不全8例，部分型胼胝体发育不全6例，有胎儿尸检结果对照者5例)，3例为单纯侧脑室轻度扩张，2例考虑脑白质发育不良，合并Dandy—Walker综合征1例，胼胝体脂肪瘤1例，检出超声漏诊合并Dandy-Walker综合征1例及脑小畸形1例。

The myelinization of cerebellar white matter,middle cerebellar peduncles,anterior limb of internal capsule,splenium and genu of corpus callosum,centrum semiovale,the white matter in parietal-occipital area and frontal-temporal area were documented at birth to 5,2～4,3～7,3～5,4～7,2～7,3～9 and 4～12 months old,respectively.

髓鞘形成至成熟时间：小脑上下脚、桥脑背侧、丘脑腹外侧和内囊后肢后部出生时已成熟，小脑自出生至5个月，小脑中脚2～4个月，内囊前肢3～7个月，胼胝体后部、膝部分别是3～5个月、4～7个月，半卵圆中心2～7个月，枕顶叶白质3～9个月，额颞叶白质4～12个月。

One patient had right occipitotemporal and entrolateral thalamic stroke.

1例患有右枕颞和丘脑腹侧卒中。

The summed activity of multiple nodes of a distributed cortical network supports face recognition in humans, including "core" ventral occipitotemporal cortex regions, and "extended" regions outside VOTC.

分布式皮层网络中多个节点，包括&核心&腹侧枕颞皮质区域和VOTC之外&扩展&区域的总体活化，支持人的面部识别。

Pronounced differences were found in Left perisylvian/Language and Medial temporal/Memory systems, along with significant differences in Lateral/Prefrontal/Working memory and Anterior cingulate/Cognitive control and smaller, nonsignificant differences in Occipitotemporal/Pattern vision and Parietal/Spatial cognition.

左侧外侧裂区和颞叶中部存在显著的差异。前额叶与额叶侧部和前扣带回之间也具有显著差异。而枕颞叶和顶叶之间的差异较小，且没有显著性。

Results Compare to healthy controls, the volumes of bilateral superior occipital lobule and left paracentral lobule of patients with schizophrenia are smaller, and the volume of cerebrospinal fluid is greater.

结果 精神分裂症患者双侧枕叶上部和左侧中央旁小叶体积小于对照组，而脑脊液的体积多于对照组。

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。

Results All cases showed a bilateral symmetric changes in the posterior periventrieular white matter,MRI signals were longish T_1 on T_1WI and hyperintensity on FLAIR,which appears as butterfly with splenium of corpus callosum infiltration.

结果：MR扫描7例均显示双侧脑室三角区周围白质内对称分布的异常信号，主要位于枕、顶、颞叶，胼胝体体部、压部，T1WI呈稍长T1信号，FLAIR像示高信号，呈典型的&蝶翼状&，1例于视放射区呈对称性的长T2信号。

Although classic neuroimaging features of RPLS with involvement of the posterior head regions are easily recognized, features that may generally be regarded as atypical were often present in our patients, such as significant anterior involvement, cortical lesions, recurrent RPLS episodes, foci of permanent injury, hemorrhage into lesions, and unilaterality (Figure 1). High signal intensity on T2-weighted image lesions can occur in regions other than the parieto-occipital areas, frequently involving the frontal lobes, basal ganglia, thalami, or brainstem.

可逆性后部白质脑病综合征典型的神经影像学表现为大脑后部受累，尽管这一点很早就被公认；但可逆性后部白质脑病综合征不典型的神经影像学表现，在本文的患者中则更常见，如：大脑前部明显受累、皮层出现病灶、可逆性后部白质脑病综合征再次发作、脑永久性损伤灶形成、病灶内出血、仅见单侧病灶（图1）；T2像常可于额叶、基底节区、丘脑、脑干等顶-枕叶以外的区域见高信号病灶。

Methods Eighty six patients with large acoustic neuromas (≥3 cm) underwent surgical treatment via suboccipical retrosigmoid transmeatal approach.

对86例单侧大型听神经瘤（直径≥3 cm）病人采用枕下乙状窦后入路显微切除肿瘤。

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。