preganglionic

简明释义

英[ˌpriːɡæŋɡliˈɒnɪk]美[priˌɡæŋɡliˈɑnɪk]

adj. （神经）节前的

英英释义

单词用法

同义词

反义词

例句

1.The first neuron in this sequence is called the preganglionic neuron.

第一神经元在此序列被称为节前神经元。

2.After vagotomy of preganglionic fibers in the anterior gastric corpus wall of rats, retrograde-labelling of Horseradish Peroxidase (HRP) was used to detect the regeneration of vagus nerve.

在小弯侧切开大鼠胃体前壁以完全切断分布至胃体前壁的迷走神经节前纤维。

3.It suggests that a target organ may be innervated by a special group of preganglionic neurons, and in turn, they may receive specific neuronal input, characterized by a particular neurotransmitter.

提示靶器官由一群特定的交感节前神经元支配，后者又接受含某种特定神经介质纤维的支配。

4.CONCLUSION: These results indicate that RSV infection can cause dysfunction of M2 autoreceptor on the airway preganglionic cholinergic nerves, resulting in airway hyperresponsiveness.

结论：RSV感染导致气道副交感神经自身抑制性M2受体功能障碍，引起气道高反应性发生。

5.It suggests that a target organ may be innervated by a special group of preganglionic neurons, and in turn, they may receive specific neuronal input, characterized by a particular neurotransmitter.

提示靶器官由一群特定的交感节前神经元支配，后者又接受含某种特定神经介质纤维的支配。

6.Because sympathetic ganglia lie close to the vertebral column, sympathetic preganglionic fibers are generally short.

因为交感神经节的谎言接近脊柱，交感神经节前纤维，一般短。

7.Objective to summarize the results of phrenic nerve transfer in treatment of preganglionic injuries of brachial plexus in obstetrical palsy and its effect on respiratory function in babies.

目的总结临床膈神经移位治疗产瘫节前损伤的疗效及其对肺功能的影响。

8.In the sympathetic nervous system, the preganglionic fibers are typically short and myelinated.

在交感神经系统中，preganglionic 纤维通常较短且有髓鞘。

9.The preganglionic neurons are responsible for transmitting signals from the central nervous system to the autonomic ganglia.

这些preganglionic 神经元负责将信号从中枢神经系统传递到自主神经节。

10.The activation of preganglionic neurons can lead to a rapid response in the body’s fight or flight mechanism.

激活preganglionic 神经元可以导致身体在战斗或逃跑机制中的快速反应。

11.Damage to the preganglionic pathways can result in significant autonomic dysfunction.

对preganglionic 通路的损伤可能导致显著的自主神经功能障碍。

12.Research has shown that preganglionic cholinergic neurons play a crucial role in regulating heart rate.

研究表明，preganglionic 胆碱能神经元在调节心率方面起着至关重要的作用。

作文

The human nervous system is a complex network that plays a crucial role in maintaining the body's homeostasis and facilitating communication between different body parts. One of the key components of this system is the autonomic nervous system, which is responsible for regulating involuntary bodily functions such as heart rate, digestion, and respiratory rate. Within the autonomic nervous system, there are two main divisions: the sympathetic and parasympathetic nervous systems. A significant aspect of these systems involves the neurons that transmit signals from the central nervous system to various target organs. Among these neurons, the term preganglionic">preganglionic refers to those that originate in the central nervous system and extend to ganglia, where they synapse with postganglionic neurons. This distinction is vital for understanding how signals are relayed throughout the body.The preganglionic">preganglionic neurons can be found in both the sympathetic and parasympathetic divisions of the autonomic nervous system. In the sympathetic division, preganglionic">preganglionic neurons arise from the thoracolumbar region of the spinal cord, specifically from T1 to L2 segments. These neurons are relatively short and release acetylcholine as their neurotransmitter, which binds to receptors on postganglionic neurons located in sympathetic ganglia. The postganglionic neurons then project to target organs, releasing norepinephrine to elicit a 'fight or flight' response during stressful situations.Conversely, in the parasympathetic division, preganglionic">preganglionic neurons originate from the craniosacral regions of the central nervous system, particularly from the brainstem and sacral spinal cord. These neurons are generally longer than their sympathetic counterparts and also release acetylcholine at the synapse with postganglionic neurons, which are located much closer to or within the target organs themselves. This system is often referred to as the 'rest and digest' system, promoting relaxation and conservation of energy after a stressful event.Understanding the role of preganglionic">preganglionic neurons is essential for comprehending how our bodies respond to various stimuli. For instance, during a stressful event, the activation of sympathetic preganglionic">preganglionic neurons leads to a cascade of physiological changes, including increased heart rate, dilated pupils, and enhanced blood flow to muscles. These changes prepare the body to either confront or flee from perceived threats.Moreover, studying preganglionic">preganglionic neurons has important implications for medical science. Conditions such as autonomic dysreflexia, which can occur in individuals with spinal cord injuries, highlight the need for a deeper understanding of how preganglionic">preganglionic pathways function. By examining these pathways, researchers can develop better treatments for managing symptoms associated with autonomic dysfunction.In conclusion, the term preganglionic">preganglionic is integral to the study of the autonomic nervous system. These neurons serve as the primary conduits for transmitting signals from the central nervous system to the peripheral organs, influencing various involuntary physiological responses. A comprehensive grasp of the role and function of preganglionic">preganglionic neurons enhances our understanding of the body's intricate regulatory mechanisms, ultimately contributing to advancements in medical research and treatment strategies.

人类神经系统是一个复杂的网络，在维持身体的内环境稳定和促进身体各部分之间的沟通中发挥着至关重要的作用。这个系统的一个关键组成部分是自主神经系统，它负责调节心率、消化和呼吸频率等不随意的身体功能。在自主神经系统中，主要有两个分支：交感神经系统和副交感神经系统。这些系统的一个重要方面涉及将信号从中枢神经系统传递到各种目标器官的神经元。在这些神经元中，术语preganglionic">preganglionic指的是那些起源于中枢神经系统并延伸到神经节的神经元，在那里它们与后神经元突触连接。这一区别对于理解信号在全身的传递方式至关重要。preganglionic">preganglionic神经元可以在自主神经系统的交感和副交感分支中找到。在交感分支中，preganglionic">preganglionic神经元起源于脊髓的胸腰段，具体来说，是T1到L2段。这些神经元相对较短，并释放乙酰胆碱作为其神经递质，该物质与位于交感神经节的后神经元上的受体结合。后神经元随后投射到目标器官，释放去甲肾上腺素以在压力情况下引发“战斗或逃跑”反应。相反，在副交感分支中，preganglionic">preganglionic神经元起源于中枢神经系统的脑干和骶髓。这些神经元通常比交感神经元长，并在与后神经元突触时也释放乙酰胆碱，后神经元位于离目标器官更近或在目标器官内。该系统通常被称为“休息和消化”系统，促进放松并在压力事件后节省能量。理解preganglionic">preganglionic神经元的作用对于理解我们身体如何对各种刺激作出反应至关重要。例如，在压力事件期间，交感神经preganglionic">preganglionic神经元的激活导致一系列生理变化，包括心率增加、瞳孔扩张和肌肉血流增强。这些变化准备身体面对或逃避感知到的威胁。此外，研究preganglionic">preganglionic神经元对医学科学具有重要意义。诸如自主神经反射亢进等情况可能发生在脊髓损伤患者中，这凸显了深入理解preganglionic">preganglionic通路功能的必要性。通过检查这些通路，研究人员可以开发出更好的治疗方法，以管理与自主功能障碍相关的症状。总之，术语preganglionic">preganglionic对自主神经系统的研究至关重要。这些神经元作为从中枢神经系统到外周器官传递信号的主要通道，影响各种不随意的生理反应。全面掌握preganglionic">preganglionic神经元的角色和功能增强了我们对身体复杂调节机制的理解，最终有助于医学研究和治疗策略的进步。