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首页> 外文学位 >Lameness associated with a possible neural problem in the lower spinal cord of chickens, Gallus gallus.
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Lameness associated with a possible neural problem in the lower spinal cord of chickens, Gallus gallus.

机译：行与鸡下半带脊髓下部可能存在的神经问题有关。

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摘要

Since the second half of the twentieth century lameness in broiler chickens has been known to be caused by different types of disorders, however the etiology of several type of lameness remain unknown. Because of the intense selection of broilers for rapid growth, some birds are more prone to physiological insults resulting in lameness. This study focuses on possible neural problems in the lower spinal cord associated with lameness in broilers. Broilers were raised in pens with wire floors and provided with food and water ad libitum. Three groups of birds (1) birds displaying a normal gait (Controls), (2) lame birds with normal leg bones (Neural Associated Lameness), and (3) lame birds with femoral head separation/necrosis (Bone Associated Lameness) were selected based upon behavioral observations of gait. Motor neurons in the lateral motor column of the lumbosacral region of birds in the neural associated lame group were observed to have changes in the perikarya of motor neurons. The lumbosacral segment 4 (LS 4) of the spinal cord was selected for analysis, based upon its central location in the lumbosacral region and the highest number of motor neurons when compared to other segments. In the neural associated lame group the motor neurons were more globular in appearance with a 25% to 40% reduction in protrusions from the perikarya when compared to controls. The corticosterone level, an indicator of stress, was increased 3-4 fold in the lame birds when compared to the controls. Additionally, an association between decreased percentage body weight gain and increased corticosterone level in lame birds was observed. Results of this study indicate an association between the reductions of neurites in the motor neurons of the lumbosacral spinal cord and a leg weakness in broilers with normal leg bones.;Keywords: lameness, spinal cord, lateral motor column, globular neurons, corticosterone, gait score.
机译：自二十世纪下半叶以来，肉鸡的la行症是由不同类型的疾病引起的，但是几种several行症的病因仍然未知。由于为快速生长而大量选择肉鸡，一些禽类更容易受到生理侮辱，导致la行。这项研究的重点是与肉鸡la行有关的下脊髓神经可能出现的问题。用带金属地板的围栏饲养肉鸡，并随意提供食物和水。选择三组鸟（1）步态正常的鸟（对照组），（2）腿骨正常的la子鸟（神经相关La行）和（3）股骨头分离/坏死的la鸟（骨相关La行）根据对步态的行为观察。观察到与神经相关的me子组的鸟类腰ac部外侧运动柱中的运动神经元在运动神经元的骨核周围有变化。选择脊髓的腰s段4（LS 4）是根据其在腰s区的中心位置以及与其他节段相比最多的运动神经元数进行分析的。在神经相关的me子组中，与对照组相比，运动神经元的外观更呈球形，与周围核突出的突起减少了25％至40％。与对照组相比，the子鸟的皮质类固醇激素水平（应激指标）增加了3-4倍。另外，观察到la脚禽体重增加百分比降低与皮质酮水平升高之间存在关联。这项研究的结果表明，腰spin脊髓运动神经元的神经突减少与正常腿骨肉鸡的腿无力之间存在相关性;关键词：la行，脊髓，外侧运动柱，球状神经元，皮质酮，步态得分了。

著录项

  • 作者

    Nagarajan, Gurueswar.;

  • 作者单位

    University of Arkansas.;

  • 授予单位 University of Arkansas.;
  • 学科 Agriculture Animal Pathology.;Biology Neuroscience.
  • 学位 M.S.
  • 年度 2012
  • 页码 64 p.
  • 总页数 64
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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