As seen in the transverse section,the gray matter of the spinal cord lies centrally and has a roughly Hshaped or butterfly outline. The small central canal is located in the center of the spinal cord.Thin dorsal and ventral gray commissures surround the c...[繼續(xù)閱讀]

    or named Bournevillesdisease,is a hereditary disease with autosomal dominant fashion. Clinically,it is characterized by the sebaceous adenoma onthe face,onset of epilepsy and intellectualdeficiency,and may be accompanied by the variable abnormal changes o...[繼續(xù)閱讀]

    系指外周神經(jīng)、脊髓 后索的變性性疾病。是由于胃內(nèi)因子 (Castle因子)缺乏和維生素B12吸收不良引 起的,通常伴有惡性貧血。其臨床特征是肌強(qiáng) 直、共濟(jì)失調(diào)、外周神經(jīng)功能障礙。...[繼續(xù)閱讀]

    位于舌下神經(jīng)核的背外, 側(cè),其上、下端略超過(guò)舌下神經(jīng)核。主 要由小梭形細(xì)胞組成,發(fā)出副交感神經(jīng)節(jié)前 纖維行向腹外側(cè),在橄欖后溝上部出腦,組成 迷走神經(jīng)運(yùn)動(dòng)根。...[繼續(xù)閱讀]

    maidism,is a disease causedby deficiency of vitamine B complex,spe cially niacin. It is characterized by dermitis,glossitis,diarrhea and cerebromyelic or peripheral nerve degeneration. Defi ciency of niacin may be caused by malnutrition,absorbing dysfunct...[繼續(xù)閱讀]

    lies be neath the facial colliculus in the rhomboidfossa,extending superiorly from the plane of the lower end of the motor nucleus of the trigeminal nerve to the rostral part of the motor nucleus of the facial nerve inferiorly. It is composed of small,med...[繼續(xù)閱讀]

    由交感干神經(jīng)節(jié)發(fā)出返回脊 神經(jīng)的節(jié)后纖維組成,因無(wú)髓鞘,色澤 灰暗而得名。這些纖維進(jìn)入脊神經(jīng)后,隨之分 布至豎毛肌、汗腺和血管。灰交通支存在于全 部脊神經(jīng)與交感干神經(jīng)節(jié)之間。...[繼續(xù)閱讀]

    Some patients have prodromes prior to the onset of their convulsions. The most common manifestation is a series of short minor attacks early in the day followed by a majortonicoclonic seizure later. Then,loss of con sciousness appears and usually precedes...[繼續(xù)閱讀]

    是由與軸突平行的雙分子脂質(zhì)層同蛋白質(zhì)分子交替構(gòu)成的。因此,髓 磷脂實(shí)際上是多層經(jīng)過(guò)改造的細(xì)胞膜組成。 施蘭切跡是雪旺細(xì)胞的細(xì)胞質(zhì)圍著軸突纏繞 的過(guò)程中被留在髓磷脂層內(nèi)的部分。...[繼續(xù)閱讀]

    系由于腦動(dòng)脈血栓形成引 起腦動(dòng)脈梗塞而產(chǎn)生局灶性神經(jīng)癥。 該病的常見(jiàn)病因?yàn)槟X動(dòng)脈粥樣硬化、高血壓、 糖尿病及黃瘤病等。60歲以上患者多見(jiàn),大多 于睡眠、安靜狀態(tài)下或起立時(shí)發(fā)病。臨床特征 包括:意識(shí)相對(duì)清晰,腦脊液正常...[繼續(xù)閱讀]