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thoracolumbar
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  thoracolumbar
Camptocormia is defined as an abnormal, severe and involuntary forward flexion of the thoracolumbar spine, which becomes manifest during standing and walking and subsides in the recumbent position.
      
Spinal subarachnoid hemorrhage due to ruptured solitary aneurysm at thoracolumbar level with fatal outcome
      
Alternating monomeric paresis with decreased skin temperature and hyperhidrosis in a case of thoracolumbar myelopathy
      
Magnetic resonance imaging of the thoracolumbar cord showed abnormal signal intensity with syrinx formation mainly at T12 to L1 vertebral level.
      
Interbody Fusion in Thoracolumbar Fractures (T11-L2) Using the Percutaneous Dorsolateral Technique
      
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The latissimus dorsi muscles with their nerves and blood vessels were investigatedon 30 sides of adult cadavers.It was found that the antero-lateral region of the mus-cle was thicker than the other regions,and its tendinous membrane could be easily se-parated from the thoracolumbar fascia.The thoraco-dorsal nerve was accompanied bythe thoracodorsal artery which derided into three branches at the point about 3.5cmbelow the inferior angle of scapula,An imitative study demonstrated that the transfer of the...

The latissimus dorsi muscles with their nerves and blood vessels were investigatedon 30 sides of adult cadavers.It was found that the antero-lateral region of the mus-cle was thicker than the other regions,and its tendinous membrane could be easily se-parated from the thoracolumbar fascia.The thoraco-dorsal nerve was accompanied bythe thoracodorsal artery which derided into three branches at the point about 3.5cmbelow the inferior angle of scapula,An imitative study demonstrated that the transfer of the muscle for the reconstruction of gluteal muscle could make the lower extremityabduct, lateral-rotate and posterior-extend.This suggests that it might be useful totransfer the antero-lateral region of the latissimus dorsi muscle for the reconstructionof the gluteal muscle.When this operation is performed,the incision should be locatedbelow the level of the inferior angle of scapula to avoid injuring the nerves and ves-sols.

为配合背阔肌代臀肌治疗脊髓灰质炎后遗症这一术式的开展,在尸体材料上进行了应用解剖学研究和力学分析。以背阔肌代替瘫痪的臀肌,可使髋关节在三个运动轴上行外展、外旋和后伸运动。背阔肌的神经血管走行在肌的深面,并在肩胛骨下角下方分支进入肌内,贴附深层结构分离,可避免损伤主要神经血管。根据解剖学特点讨论了手术中应注意的问题。

Intracellular recordings of antidromically indentified sympathetic preganglionic neurons(SPNs) were made in thoracolumbar spinal cord slices from neonate rats (7-16 days). In the SPNs population, a 7-20 mV long-lasting afterhyperpolarization(11-AHP) lasting for 1 to 10 s following spike potential could be recorded in part of the neurons and the 11-AHPs was usually preceded by a fast component lasting shorter than 400 ms. With decrease of membrane resistance during 11-AHP, membrane potential-dependent property...

Intracellular recordings of antidromically indentified sympathetic preganglionic neurons(SPNs) were made in thoracolumbar spinal cord slices from neonate rats (7-16 days). In the SPNs population, a 7-20 mV long-lasting afterhyperpolarization(11-AHP) lasting for 1 to 10 s following spike potential could be recorded in part of the neurons and the 11-AHPs was usually preceded by a fast component lasting shorter than 400 ms. With decrease of membrane resistance during 11-AHP, membrane potential-dependent property was observed and the calculated reversal potential was -90 to -100 mV. The results indicate that the 11-AHPs are effective in the control of firing frequency of SPNs.

在新生大鼠胸腰段脊髓薄片,对经腹根逆行刺激鉴定的交感节前神经元(SPNs)进行细胞内记录.发现部分SPNs有长时程后超极化电位(11-SHP),其达峰时间为0.2-0.7s.时程1-10s,幅度7-20mV。11-AHP前部常为6—30ms达峰、短于400ms时程的快AHP成分。11-AHP除伴有膜输入电阻降低外,还呈膜电位依赖性,翻转电位为-90至-100mV。结果证明11-AHP能起着控制SPN的放电频率的重要作用。

Intracellular recordings were made from 25 antidtomitally identified motoheurons(MNs)in the transverse thoracolumbar spinal cord slices(500 μm)of neonaterats(7-16d).In more than 80 % MNs,depolarization potentials(EPSP)with latency of 1.21±0.2 ms could be evoked by focal stimulation(0.1 ms,1-20 V,0.1Hz)of ventrolateral funiculus.When recorded at resting potential of-70±6 mV,the time-to-ark,amplitude,half-decay time and duration of EPSPs to suprathreshold stimuli were respectively,2.6±0.4 ms,13±3 mV,5.3±1.6...

Intracellular recordings were made from 25 antidtomitally identified motoheurons(MNs)in the transverse thoracolumbar spinal cord slices(500 μm)of neonaterats(7-16d).In more than 80 % MNs,depolarization potentials(EPSP)with latency of 1.21±0.2 ms could be evoked by focal stimulation(0.1 ms,1-20 V,0.1Hz)of ventrolateral funiculus.When recorded at resting potential of-70±6 mV,the time-to-ark,amplitude,half-decay time and duration of EPSPs to suprathreshold stimuli were respectively,2.6±0.4 ms,13±3 mV,5.3±1.6 ms and 31±8ms.The arers were graded in consummate to stimulus intensity and upon reachingthreshold dopolarization,action potentisls were initiated. Relstively Constant latencyof EPSPs was observed in spite of varying stimulus frequency from 0.1to 5 Hz.Upon incrdsng stimulation frequency >20 Hz,EPSPs began to decease and fatally disappered.In 3 MNs tacted,the mean reversal potential of EPSPs was-8mV. LowCa/high Mg solution consistently attenuated but Mg-free solution enhanced theEPSPs. EPSPs were reversibly depressed by kynurenic acid(0.5-1mmol/L)andmartially inhibited by ketamine(50-100μmol/L).The findings of the present investigation suggest that MNs are excited by the descending fibers in ventrolateral funiculus possibly via excitatory amino acid transmitters.

在新生大鼠脊髓薄片细胞内记录了25个经送行刺激鉴定的运动神经元(MN),发现腹外侧索刺激可在80%的MN诱发去极化反应(EPSP)。在静息电位水平EPSP的潜伏期、达峰时间、幅度、半衰时间和时程分别为1.2±0.2ms,2.6±0.4ms,13±3mV,5.3±1.6ms和31±8ms。EPSP呈等级性和膜电位依赖性,平均翻转电位为-8mV,潜伏期在0.—5Hz频率的刺激时相对恒定,但刺激频率>20Hz时EPSP变小或被取消。EPSP在低钙高镁溶液中被阻抑叵在无镁溶液中增强。犬尿烯酸(0.5—1mmol/L)可逆地阻断EPSP,但氯胺酮(50—100μmol/L)仅部分抑制之。结果表明腹外侧索中的下行纤维可能释放兴奋性氨基酸而激活MN。

 
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