arises from the lumbar plexus and is formed by fibers of the 2nd to 3th lumbar nerves. It emerges from the medial border of the psoas major near thebrim of the pelvis,passes down into thepelvis,lateral to the ureter and dorsal tothe common iliac artery,an...[继续阅读]

    当病人睁眼时 能双足站立,闭眼时摇晃或摔倒,即为 闭目难立征阳性。此试验用于检查共济功能, 对检查运动觉和位置觉有意义。运动觉和位 置觉亦可通过姿势和步态的观察来估价。...[继续阅读]

    is positive when the pa tient is able to stand with feet together and eyes open but sways or falls when the eyes are closed. Romberg sign belongs tothe test for ataxia,which is effective in demonstrating the senses of motion and position. The seneses of m...[继续阅读]

    在中脑与脑桥 间双侧皮质脊髓束受到损害而中断, 或者由于下运动神经元病变或肌病所致的周 围运动功能的严重损害时,病人全身运动部 分发生瘫痪。患者虽然保持清醒和知觉功能, 但除了用眼部活动来表示意思外,不能用其 他方法...[继续阅读]

    de scribes a condition in which patients re main awake and sentient but because of motor paralysis in all parts of the body cannot communicate except possibly by coded eye movements. several diseases cancause the condition,which results form bilateral int...[继续阅读]

    由第5～8颈神经前支和第1胸 神经前支大部分组成,位于锁骨区的 颈外侧部,自前斜角肌延至腋窝。该丛分布于 上肢、肩部及部分胸臂肌和皮肤。...[继续阅读]

    formed by the ventral primary divisions of the 5th to 8th cervical nerves and the most part of the first tho racic nerve. It lies in the lateral part ofthe neck in the clavicular region,extend ing from the scalenus anterior to the axil la. This plexus sup...[继续阅读]

    起于臂丛内侧束,由第8 颈神经和第1胸神经的纤维组成,初 经腋动、静脉之间,继行于腋静脉内侧,并在此发一分支与肋间臂神经相交通,然后沿肱 动脉下行至臂中部浅出深筋膜,布于臂内侧 的皮肤。...[继续阅读]

    arises from the medial cord of brachial plexus and is composed of fibers of the 8th cervi cal nerve and the 1st thoracic nerve. It passes through between the axillary arteryand vein at first in the axilla,then runs laterally medial to the axillary vein wh...[继续阅读]

    包括边缘叶及与之相连的皮 质下结构。这些结构有: 杏仁体、隔 区和隔核、上丘脑、下丘脑、丘脑前核群及 中脑被盖内侧区。它们主要与内脏活动、情 绪和记忆有关。...[继续阅读]