后颅凹肿瘤术中的脑干听觉诱发电位监测分析

目的:探讨脑干听觉诱发电位技术对后颅凹肿瘤术中监护的临床意义。方法:对16例后颅凹肿瘤患者进行术前检查,术中监护,并对BAEP各波波形、潜伏期进行分析。结果:Ⅰ、Ⅲ、Ⅴ波潜伏期延长10例伴Ⅰ—Ⅲ、Ⅲ—Ⅴ或Ⅰ—Ⅴ波波间期延长;波形分化不良或波幅较低6例;手术操作牵拉可引起BAEP不同程度变化。结论:后颅凹占位病变术中的BAEP监护,对保护听觉和脑干功能及术后功能的评估有重要意义。     

高热惊厥脑干听觉诱发电位的分析

本文报道了30例高热惊厥患儿的脑干听觉诱发电位检测结果。结果提示,高热惊厥患儿脑干听觉诱发电位异常率较高,以Ⅰ—Ⅴ波峰间期延长为主,同时Ⅰ、Ⅲ、Ⅴ波耳间差值增大。文中讨论了这一结果与高热惊厥发病年龄特征的关系。     

Effects of low pass filtering on the brainstem auditory evoked potential in the rat

Summary The effects of low pass filtering on the brainstem auditory evoked potential (BAEP) were studied in the adult male rat. The bandpass of the recording system was progressively widened while the cut-off frequency of the high pass filter remained constant at 3.2 Hz. When the high frequency cut-off was 320 Hz or less, the principal waveform recorded in response to a click stimulus was a slow positive-negative complex. As the high frequency setting was raised from 800 Hz to 3.2 kHz, the slow components of the brainstem were replaced by four fast BAEP waves (I, II, III and IV). As the bandpass widened there was an increase in amplitude and a decrease in the absolute latency of all four fast waves in the order of 0.1 ms although the wave I–IV interpeak latency remained unaffected. The results confirm that the high frequency components of the BAEP are underlain by a slow positivity of uncertain origin followed by a slow negativity which probably arises within the inferior colliculus.This study was supported by the Medical Research Council of New Zealand     

后循环梗死患者的BAEP、BR、TSEP检测

目的：探讨后循环脑梗死（PCI）患者脑干听觉诱发电位（BAEP）、瞬目反射（BR）、三叉神经诱发电位（TSEP）三种电生理变化。方法：选择60例经头颅MRI检查证实为PCI患者（病例组）,分别于入院一周之内行BAEP、BR、TSEP检查,观察BAEP波形及I、Ⅲ、V波潜伏期（PL）、峰间期（IPL）,计算BR既R1、R2、R2波平均PI。、波幅及TSEP各成分PL,并与40例健康体检者作对照。结果：病例组60例中BAEP异常35例（58％）,异常主要表现为I、V波的PL、I—V波的IPL延长和I／V波幅比〉1。BR异常33例（55％）,异常主要表现为R2波的PL延长,R2、R2’波幅下降。TSEP检查病例组与对照组PL比较未见明显差异。结论：BAEP、BR两种电生理检查方法能够较好地检测出PCI患者神经功能异常,联合应用BAEP及BR能够为PCI患者的神经功能的判断提供重要参考。     

孤独症患者脑干听觉通路功能的评估与研究

目的：研究孤独症患者脑干听觉通路的功能状态,并探讨其可能的构建模式。方法：采用脑干听觉诱发电位（BAEP）技术对36例孤独症患者（孤独症组）与27例对照者（对照组）进行测试,分析比较BAEP成分的组问差异。结果：孤独症组BAEP中双侧Ⅲ、V波的潜伏期（PL）和各峰间期（IPL）均较对照组延长,其中右侧Ⅲ波PL和双侧V波PL延长之组间差异显著（P〈O．05）,左侧Ⅲ-V波和双侧I—V波IPL延长组间差异显著（P〈0．05）。结论：孤独症患者存在脑干听觉通路功能异常或脑干功能发育不成熟。脑干传导时间延长产生的听觉信息传递失真与中枢性听觉紊乱可能是孤独症形成的构建模式之一。     

Aging effects on brainstem auditory evoked potentials

Since age effects on central conduction time in the acoustic pathway are still debated, we recorded brainstem auditory evoked potentials in 154 normoacoustic subjects, with no history of neurologic or otologic pathology. Linear regression has been used for statistical analysis. Data obtained show an age-related prolongation of latency values which is particularly marked for wave I, while other waves (particularly wave III) do not show a significant change. Thus, interpeak latency (IPL) values do not increase with increasing age: in particular IPLs I-II and I-III decrease, showing a negative "r" value, and IPLs I-V and II-V (which is to be considered the true "central conduction time" through the acoustic pathway) do not show a significant change. Our data seem to demonstrate that the aging process is essentially a peripheral phenomenon which does not involve the central part of the acoustic pathway.     

Involvement of central nervous system in patients with diabetes mellitus detected by evoked potentials

Somatosensory (SSEPs) and brainstem auditory evoked potentials (BAEPs) were recorded for 44 patients with diabetes mellitus (age, 63.0 +/- 9.3 years, mean +/- SD) and 20 age-matched healthy controls (age, 67.3 +/- 9.1 years) to elucidate the involvement of the central nervous system (CNS) in diabetes mellitus. Furthermore, relationships between SSEP or BAEP and clinical variables such as autonomic nervous function, peripheral nerve conduction velocity, duration of diabetes, metabolic control (fasting blood sugar level, HbA1 and HbA1c levels) and therapeutic method, were studied. The central conduction time (CCT), which represents the peak latency between N13 and N20, in patients with diabetes mellitus was significantly longer than that of the healthy controls (p less than 0.005). Likewise, diabetic patients showed significant prolongation of interpeak latency between waves I and V (I-V IPL) compared to the healthy controls (p less than 0.005). Significant correlations between CCT and motor conduction velocity of median nerve (p less than 0.05) were observed although the correlation between CCT and sensory nerve conduction velocity was not found to be significant (p less than 0.1). Furthermore, I-V IPL was significantly correlated with the duration of illness (p less than 0.05). There were no significant correlations between CCT or I-V IPL and autonomic nervous dysfunction as determined by orthostatic hypotension and the coefficient variation of the R-R interval or metabolic control or therapeutic method. From the present results, it would appear that there is CNS involvement even in diabetic patients not manifesting overt CNS signs and symptoms and that it is correlated somewhat with impairment of the peripheral nervous system and duration of illness.     

Visual and brainstem auditory evoked potentials in hereditary motor-sensory neuropathy

Visual evoked potentials (VEP) and brainstem auditory evoked potentials (BAEP) were recorded in 57 children and adults with hereditary motor-sensory neuropathy (HMSN); 37 of them were diagnosed as type I (demyelinating) and 20 as type II (axonal). None of the patients presented central nervous system involvement. The results were compared with VEP and BAEP records of 12 adults with Guillain-Barré syndrome (GBS) and 40 healthy controls. Above 30% of all patients with HMSN I showed delayed latency of the VEP. These abnormalities were less expressed in HMSN II. Abnormal BAEP were observed in almost 50% of patients with HMSN I and HMSN II with nearly the same frequency in both types but more pronounced in HMSN I. The most common feature was prolongation of the I-III interpeak latency (JPL). The VEP and BAEP changes could be present simultaneously in the same patient (mainly in HMSN I) or separately. More often the abnormalities were observed in the adult patients. Normal VEP and BAEP values were present in all patients with GBS. The results strongly suggest the subclinical optical and auditory pathways involvement in HMSN patients.     

100例突聋患者的脑干听觉诱发电位观察

目的:观察BAEP在突聋患者中的变化规律,探讨其应用价值。方法:对突聋组患者结合正常对照,进行BAEP分析。结果:突聋患者,BAEP各波潜伏期、I—V峰间期、Ⅲ-Ⅴ/Ⅰ-Ⅲ比值明显长于正常人(PM相似文献   

Auditory neuropathy in streptozotocin-induced diabetic mouse

An investigation of the mechanism of damage to the peripheral nervous system and central nervous system in diabetes mellitus (DM) is highly important in current neurological research. Auditory neuropathy is a hearing disorder in which the auditory brainstem evoked potential is absent or severely abnormal. This study investigated auditory neuropathy caused by streptozotocin in mouse model. In order to assess diabetic auditory neuropathy, we evaluated auditory brainstem response (ABR) for the evaluation of sensorineural function in peripheral auditory nerve. Auditory middle latency response (AMLR) was employed to assess the middle response in the midbrain. STZ groups significantly increased the absolute latencies IV and the interpeak latencies I-III and I-IV of ABR compared with STZ 0 group. Pa latency of AMLR also significantly increased in proportion to STZ dosage. Taken together, our results demonstrate that STZ-induced DM may impair the auditory pathway from peripheral auditory nerve to midbrain in the mouse model. We suggest that the STZ-induced diabetic mouse model may be useful for the evaluation of auditory pathway impairment by using ABR and AMLR tests.     

127例轻型头部外伤脑干听觉诱发电位的分析

对127例轻型头部外伤患者的脑干听觉诱发电位(BAEP)的检测结果分析,发现BAEP异常70例(55％),主要表现为:Ⅰ—Ⅲ,Ⅰ—Ⅴ峰间期延长,Ⅴ波潜伏期延长,Ⅲ—Ⅴ/Ⅰ—Ⅲ>1。统计学处理有显著差异(P<0.05)。其中63例行颅脑CT检查,异常10例(16％)。随访9例,BAEP恢复正常3例,无变化6例,BAEP的恢复一般需10周时间。分析结果表明,轻型头部外伤患者,存在有脑功能的损伤,BAEP是评价脑功能损伤较敏感的客观指标。     

帕金森病患者VEP、BAEP及SEP的测定

目的：研究帕金森病（PD）患者视觉诱发电位（VEP）、脑干听觉诱发电位（BAEP）及体感诱发电位（SEP）的变化并推测其发生机制。方法：选择2008年1月至2013年1月在昆明医学院第一附属医院神经内科门诊及住院的80例PD患者作为PD组,50例健康对照者作为对照组。应用神经电生理检查仪分别对PD患者和健康者进行VEP、BAEP和SEP检测,并进行比较。结果：PD组VEP的P100潜伏期（115．1±10．6）ms较健康对照组（103．2±9．0）ms明显延长（P〈0．01）,P100波幅（6．25±3．02）弘V较健康对照组（7．70±2．62）pV增高（P〈0．05）;PD组BAEP的I、Ⅱ、Ⅲ波的潜伏期和Ⅲ-V及I—V峰间期较对照组明显延长（P〈0．05）;SEP各波潜伏期及波幅两组比较差异无显著意义。结论：PD患者的VEP和BAEP均有不同程度的改变,提示PD患者可能伴有脑干听觉传导通路与视觉俜导诵略的桶害．     

脑干听觉诱发电位对前庭系统性眩晕的临床诊断价值

目的：探讨脑干听觉诱发电位（BAEP）对前庭周围性眩晕和前庭中枢性眩晕的诊断价值。方法：对90例前庭系统性眩晕患者（病例组）及50例健康人（对照组）进行BAEP检测,分别观测和比较各波分化情况,I、Ⅲ、V波潜伏期（PL）,I-Ⅲ、Ⅲ-V、I—V波峰间期（IPL）,两侧耳间差（ILD）,V／I波的波幅比,并进行统计学分析。结果：健康对照组波形分化良好。病例组90例中有67例（74％）BAEP异常,主要表现为波形分化异常,PL、IPL延长,其中周围性眩晕有28例（42％）,中枢性眩晕有39例（58％）。正常对照组与病例组I、Ⅲ、V波PL及I-Ⅲ、Ⅲ一V、I—V波的IPL比较,差异均有统计学意义（P〈0．05）。结论：BAEP对前庭周围性眩晕、中枢性眩晕的诊断和鉴别诊断具有重要价值,对临床治疗及预后具有一定的指导意义。     

糖尿病大鼠脑干听觉诱发电位和血一氧化氮含量的动态变化

目的:探讨脑干听觉诱发电位(BAEP)在早期诊断糖尿病中枢神经病变(DCN)中的作用及血一氧化氮(NO)与DCN发病的关系。方法:采用在体糖尿病动物模型从成模开始动态观测BAEP变化,用硝酸还原酶法测血NO含量的动态变化。结果:建模后4周实验性糖尿病(ED)组BAEPI、II、IV、V波PL和I-III、III-VIPL延长(P＜0.05),成模6周后,ED组BAEP各波PL、IPL均出现明显延长(P＜0.01)。ED组血NO在成模2周升到最高值,以后逐渐下降,与BAEP各PL、IPL变化呈负相关。结论:BAEP是早期诊断DCN的客观灵敏指标,糖尿病时血NO的减少在DCN的发病中起一定作用。     

孤独症患儿脑干听觉诱发电位研究

目的 :探讨孤独症患儿脑干听觉诱发电位 (BAEP)的表现。方法 :将研究对象分 3组 :(I)孤独症组 (AD ;2 2例 ) ;(II)单纯智力低下组 (MR ,2 0例 ) ;(III)正常对照组 (NG ,30例 )。智商测验采用 0 - 4岁小儿神经心理发育量表及韦氏智力量表 ;研究对象给予脑干听觉诱发电位测试。结果 :(1 )ADBAEP之III、V波潜伏期及I-III,I-V波峰间期 (IPL)较NG延长 (P <0 0 0 1 )。(2 )ADBAEP之III波潜伏期及I-III波IPL较MR组延长 (P <0 0 0 5)。 (3) :MRV波潜伏期及III-V、I-V波IPL较NG延长 (P <0 0 0 1 )。结论 :(1 )孤独症患儿的脑干听觉诱发电位异常 ,尤其是脑干传导时间 (BTT)的延长 ,提示脑干机能障碍导致信息向大脑传递通路的损害可能是造成孤独症患儿在认知、社会及语言能力等方面异常发育的原因之一。 (2 )孤独症患儿BAEP异常原因可能与孤独症本病特性有关而非伴随智力低下所致。     

Visual evoked potential & brainstem auditory evoked potentials in acute attack & after the attack of migraine

PURPOSE: To study the effect on visual evoked potential (VEP) and brainstem auditory evoked potential (BAEP) at time of acute attack and after 7 days of the attack of migraine. MATERIAL AND METHODS: We studied BAEP and pattern reversal VEP in 25 patients during acute attack and after 7 days of the attack. The diagnosis of migraine was established according to criteria given by international headache society (IHS). Peak and interpeak latencies (IPL's) of BAEP and P100 latency of VEP were the main criteria to judge abnormalities. RESULTS: There were prolonged peak and interpeak latencies in BAEP and prolonged peak latency (P100) in VEP at the time of acute attack of migraine. The data of these abnormal recording were highly significant. After 7 days when the attack was over, we recorded the BAEP and VEP again. The observation obtained at this time was comparable to normal values. CONCLUSIONS: From the observation of this study we can safely conclude that in acute attacks of migraine there may be some pathological changes in different areas of brain and brainstem, producing changes in evoked potential which are statistically highly significant. However, these changes are reversible, as the values of BAEP & VEP on 7th day after the attack were comparable to those observed in normal healthy control.     

Evaluation of asymptomatic central neuropathy in type I diabetes mellitus

OBJECTIVES: Diabetic neuropathy is recognized as the most common clinical picture of nervous system disorders caused by diabetes mellitus (DM). Although peripheral and autonomic nervous system involvements are frequently encountered, there exists a few data about the incidence of central diabetic neuropathies. Central nervous system degeneration is a well known pathology in diabetic patients in the long term. It is possible to reveal central nervous system involvement at the early stages by using evoked potentials (EP). The aim of this study is to evaluate the auditory, visual and sensorial abnormalities in type I diabetic patients, who also have normal nerve conduction studies, with somatosensory, brainstem auditory and visual EP studies (SEP, VEP BAEP); to determine the frequency of these abnormalities and to investigate the relationship between other variables such as age, gender, duration of the diabetes and degree of the metabolic control. PATIENTS AND METHODS: A total of 36 asymptomatic type I DM children, ages ranging between 6-17 (mean age 11 +/- 3.24) taking insulin treatments were included in this study. Control group was made up of healthy children. EPs were evaluated and comparisons were made between the two groups. RESULTS: In a large group of diabetic children (47.2%), independent from parameters such as age, gender, glycemic control degree, auditory and visual deficits, retinopathy, joint movement limitation; but dependent on the peripheral SEP pathologies and disease duration there were central electrophysiological disturbances. In 13 (36.1%) of the patients SEP pathologies; in 9 (25%) of the patients VEP pathologies and in 14 (38.9%) of the patients BAEP pathologies were detected. Conclusion: Besides independent from peripheral pathologies, central nervous system involvement could also be observed in diabetic children. EP changes can be detected in asymptomatic patients that would be a predictor of future symptoms.     

Effect of body temperature changes on evoked potentials

Short-latency somatosensory (SSEPs) and brainstem auditory evoked potentials (BAEPs) were recorded in 12 patients with fever due to respiratory infection (age, 44.3 +/- 20.9 years, mean +/- SD) to clarify the effect of body temperature change on conduction in the central somatosensory and brainstem auditory pathways. Subjects were studied during episodes of fever (37.9 +/- 0.8 degrees C) and after their body temperature had decreased (36.6 +/- 0.3 degrees C). The central conduction time (CCT), which is the peak latency between N 13 and N 20, was significantly longer after body temperature had decreased than during fever. Likewise the interpeak latency between waves I and V (I-V IPL) was significantly prolonged following decrease in body temperature. These results suggest that increases in body temperature have an effect upon conduction in the central somatosensory and brainstem auditory pathways.     

椎基底动脉供血不足患者的BAEP观察

本文分析报告了38例椎基底动脉供血不足患者的BAEP。异常率为86.84％。结果表明:该病各波潜伏期及其双耳差、各峰间期双耳差、各波振幅较健康对照组均有极显著性差异(P<0.01),波形不规整是椎基底动脉长期供血不足引致的一种严重的病理性改变。     

Generator study of brainstem auditory evoked potentials by a radiofrequency lesion method in rats

Summary The generators of brainstem auditory evoked potentials (BAEPs) in rats were investigated experimentally. Discrete lesions of the brainstem auditory pathway were made unilaterally using a stereotaxic radiofrequency coagulation method, and the BAEPs were recorded before and after the lesions to observe the alterations. The waves of the BAEPs were affected by the lesions as follows: (1) all of the BAEP waves were attenuated or eliminated by a lesion of the auditory nerve; (2) wave II was abolished or attenuated in amplitude following a lesion of the cochlear nucleus; (3) marked reduction or abolition of wave III occurred with some effect on waves IV and V following lesions of the superior olivary complex; (4) the following trough in the wave III was significantly attenuated by lesions of the lateral lemniscus that were associated with inconsistent changes in waves IV and V; (5) no waves were affected significantly by a lesion of the inferior colliculus. The method of radiofrequency lesion using stereotaxic localization proved to be a simpler and more rapid procedure for determining the generators of BAEPs in animals than other surgical lesion methods.