非病灶性癫痫致痫灶EEG、fMRI、PET定位及手术治疗的初步研究

目的探讨非病灶性癫痫(non-lesionalepilepsy,NLE)致痫灶功能定位和手术治疗策略。方法在术前综合评估的基础上,联合应用EEG、fMRI、PET等确定非病灶性致痫灶,采用显微痫灶切除、多处软脑膜下横切除术、胼胝体前部潜行切开术、选择性前颞叶切除术和联合手术以及立体定向脑核团毁损术等微创方式治疗37例NLE,随访复查,评价临床效果。结果37例NLE致痫灶定位情况EEG及PET阳性发现均为27例(72.97%),fMRI阳性30例(81.08%);其中三者均为阳性19例,三者中仅二者阳性12例,三者中仅一者阳性6例,除4例定位不一致外,余均确切定位。术后近期内1例出现一过性肢体肌力下降,余病例均无并发症。随访12~31个月,按Engle标准对手术疗效进行判断,Ⅰ级24例(64.9%),Ⅱ级7例(18.9%),Ⅲ级4例(10.8%),Ⅳ级2例(5.4%),手术总有效率为94.6%。手术前后神经心理各项评估及智商比较无统计学差异(P>0.05);31例(83.78%)病人生活质量改善。结论术前联合应用EEG、fMRI、PET等对NLE致痫灶能进行准确的功能定位,根据临床特点和术前定位情况采用不同的手术方式是治疗NLE的有效途径。     

蛇毒Ⅱ类磷脂酶A2功能分化的分析研究

目的：研究蛇毒Ⅱ类磷脂酶A2(PLA2)中D49 PLA2和K49 PLA2的功能分化及其功能分化决定位点的鉴定。方法：运用序列比较分析，进化树构建和DIVERGE v1．04软件计算研究D49 PLA2和K49 PLA2的功能分化情况及其分化位点。结果：序列比较分析，进化树构建和DIVERGE v1．04软件计算结果表明蛇毒Ⅱ类PLA2中D49 PLA2和K49 PLA2的确发生了功能分化，对于K49 PLA2来说，1S，7K，11Q，E12，R34，T56，N88，L92，E108，K116，K128可能为功能分化决定位点。对于D49 PLA2，L2，G33，G35，F46和Y118可能为功能分化决定位点。结论：我们首次通过序列比较分析，进化树构建和DIVERGE v1．04软件计算鉴定出蛇毒Ⅱ类PLA2中D49 PLA2和K49 PLA2可能的功能分化位点，为今后通过基因重组和定点突变方法研究蛇毒Ⅱ类PLA2结构功能关系提供了线索。     

带状灰质异位的磁共振弥散张量白质束成像研究

目的采用磁共振弥散张量白质束成像技术,观察带状灰质异位脑白质异常分布情况,探讨异位灰质的神经病理机制以及弥散张量白质束成像技术的应用价值。方法采用磁共振弥散张量白质束成像技术,对1例癫痫症状的带状灰质异位患者进行白质束描绘,观察其不同灰、白质的分布情况,并和1例正常人进行对比研究。结果弥散张量白质束成像技术很好地描绘了白质束结构。整体观察发现带状灰质异位患者脑白质整体结构紊乱,与正常人相比其联络弓状纤维稀疏、大部缺失,胼胝体纤维稀疏不整;局部分析发现内层灰质为主要的白质纤维发出处,而外层灰质仅发出细碎短小的纤维。结论对于带状灰质异位,异位的内层灰质不仅具有神经生理功能,并且可能起着主要作用,外层"正常"的灰质由于脑结构紊乱而丧失主要功能地位;灰质结构的紊乱导致白质纤维结构的缺失;弥散张量白质束成像技术可以很好地应用于带状灰质异位的神经机制研究。     

左心室造影功能成像的临床应用

为探讨左心室造影功能成像的价值与限度，我们选择冠脉及左心室造影者38例行左室功能成像，观察左室壁运动情况并与节段法室壁运动定量分析比较。结果示左室收缩正常18例，其各节段EF值平均39％，节段性收缩减弱7例，无收缩3例，矛盾收缩4例，普遍性收缩减弱6例，病变节段的EF值平均5～19％，明显低于正常者（P＜0．01）。结论：左室功能成像效果直观且客观，可作为室壁运动定量分析的一个重要补充。     

Cytoarchitecture and neural afferents of orbitofrontal cortex in the brain of the monkey.

The orbitofrontal cortex of the monkey can be subdivided into a caudal agranular sector, a transitional dysgranular sector, and an anterior granular sector. The neural input into these sectors was investigated with the help of large horseradish peroxidase injections that covered the different sectors of orbitofrontal cortex. The distribution of retrograde labeling showed that the majority of the cortical projections to orbitofrontal cortex arises from a restricted set of telencephalic sources, which include prefrontal cortex, lateral, and inferomedial temporal cortex, the temporal pole, cingulate gyrus, insula, entorhinal cortex, hippocampus, amygdala, and claustrum. The posterior portion of the orbitofrontal cortex receives additional input from the piriform cortex and the anterolateral portion from gustatory, somatosensory, and premotor areas. Thalamic projections to the orbitofrontal cortex arise from midline and intralaminar nuclei, from the anteromedial nucleus, the medial dorsal nucleus, and the pulvinar nucleus. Orbitofrontal cortex also receives projections from the hypothalamus, nucleus basalis, ventral tegmental area, the raphe nuclei, the nucleus locus coeruleus, and scattered neurons of the pontomesencephalic tegmentum. The non-isocortical (agranular-dysgranular) sectors of orbitofrontal cortex receive more intense projections from the non-isocortical sectors of paralimbic areas, the hippocampus, amygdala, and midline thalamic nuclei, whereas the isocortical (granular) sector receives more intense projections from the dorsolateral prefrontal area, the granular insula, granular temporopolar cortex, posterolateral temporal cortex, and from the medial dorsal and pulvinar thalamic nuclei. Retrograde labeling within cingulate, entorhinal, and hippocampal cortices was most pronounced when the injection site extended medially into the dysgranular paraolfactory cortex of the gyrus rectus, an area that can be conceptualized as an orbitofrontal extension of the cingulate complex. These observations demonstrate that the orbitofrontal cortex has cytoarchitectonically organized projections and that it provides a convergence zone for afferents from heteromodal association and limbic areas. The diverse connections of orbitofrontal cortex are in keeping with the participation of this region in visceral, gustatory, and olfactory functions and with its importance in memory, motivation, and epileptogenesis.     

Contrast agents in functional MR imaging

Contrast agents have greatly expanded the role of MR imaging (MRI) to allow assessment of physiologic, or “functional,” parameters. Although activation mapping generally does not require contrast agents, other forms of functional MRI, including mapping of cerebral hemodynamics (eg, perfusion imaging), are best done with the use of contrast agents. Serial echo planar images are obtained after bolus injection of lanthanide chelates. Application of susceptibility contrast physics and standard tracer kinetic principles permits generation of relative cerebral blood volume maps. Deconvolution of cerebral blood flow and mean transit time parameters is also possible within technical limitations. By using diffusion and perfusion pulse sequences, an imaging correlate to the ischemic penumbra can be identified. Functional MRI perfusion imaging of intraaxial tumors is analogous to positron emission tomography for delineation of metabolic activity, yet may be even more sensitive to neovascularity and possesses improved image quality. Clinical applications include biopsy site selection and postirradiation follow-up. Further improvements in data analysis and map generation techniques may improve diagnostic accuracy and utility.     

股骨近端骨折的分类与功能评价

股骨近端骨折主要包括股骨颈骨折、股骨转子间骨折和股骨头骨折：Garden股骨颈分类(1961)、Jensen改良的Evarts股骨转子间骨折分类(Evans-Jensen分类，1975)、Pipkin股骨头骨折分类(1957)、AO综合分类(1990)等是应用较广的主要股骨近端骨折分类方法。AO股骨近端骨折分类共分为3型9组27个亚组，其中关节囊外转子部骨折为A型，关节囊内股骨颈骨折为B型，关节内股骨头骨折则归为C型。由于股骨近端骨折的复杂性，骨折分类时应重点区分稳定性骨折与不稳定性骨折。股骨近端骨折治疗后的功能评价，多选用选用Harris髋关节功能评分(1969)、Sanders髋关节创伤临床功能评分(1988)。     

Factor analysis of bowel symptoms in US and Italian populations

BACKGROUND AND AIMS: Functional gastrointestinal disorders are diagnosed by the presence of a characteristic set of symptoms. Aims of this study were to validate the Rome symptom criteria by factor analysis and to determine whether symptoms cluster in the same way in different cultures. METHODS: One thousand forty-one gastroenterology clinic patients in the US (response rate 53%) and 228 family members accompanying clinic patients in Italy (84%) completed a previously validated symptom questionnaire. Factor analysis identified clusters of symptoms which are highly correlated with each other, and these were compared to the Rome diagnostic criteria. RESULTS: In the US, 13 factors were identified. The irritable bowel factor was composed of three core symptoms corresponding to the Rome II classification system. Two dyspepsia factors were identified which correspond to the ulcer- and motility-like subtypes proposed in the Rome I classification system. All symptoms of constipation formed a single cluster as proposed in the Rome II classification system. Symptom clusters in the US agreed well with symptom clusters identified in Italian subjects. CONCLUSIONS: Empirically derived symptom clusters agree in most respects with the Rome II classification system and support their validity. These symptom clusters are independent of cultural differences in diet and behaviour.     

替勃龙改善绝经期功能性消化不良症状

目的 :探讨替勃龙能否改善绝经期功能性消化不良患者临床症状及其相关机制。方法 :14 3例绝经期功能性消化不良患者随机分成 3组 ,分别给予替勃龙、西沙必利及替勃龙 +西沙必利 ,治疗 4周 ,观察治疗前后各组患者上腹胀痛、餐后胀满、早饱、暖气等临床症状积分的变化。在随机分成的 3组中再随机各抽出 2 0例患者治疗前后测定胃 30min排空率及胃半排空时间 ,观察治疗前后胃动力的变化。结果 :3组药物治疗后 2周和 4周上腹胀痛、餐后胀满症状积分均明显下降。西沙必利治疗后 2周和 4周对早饱、暖气症状无明显缓解 ,替勃龙及替勃龙 +西沙必利则对所观察的所有症状均有明显缓解 ,替勃龙改善早饱和嗳气症状优于西沙必利 ,但与西沙必利合用无增强效应。 3种药物治疗后 ,胃 30min排空率均明显增加、胃半排空时间缩短 ,与治疗前比较有显著差异 (P <0 .0 5 ) ,但 3种治疗方案之间无显著性差异 (P >0 .0 5 )。结论 :替勃龙能通过增强胃动力 ,明显改善部分绝经期功能性消化不良患者的临床症状 ,疗效优于促动力药。