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首页> 外文期刊>Journal of Neurophysiology >Locations of spinothalamic tract axons in cervical and thoracic spinal cord white matter in monkeys.
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Locations of spinothalamic tract axons in cervical and thoracic spinal cord white matter in monkeys.

机译：猴的颈和胸脊髓白质中的脊髓丘脑束轴突的位置。

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The spinothalamic tract (STT) is the primary pathway carrying nociceptive information from the spinal cord to the brain in humans. The aim of this study was to understand better the organization of STT axons within the spinal cord white matter of monkeys. The location of STT axons was determined using method of antidromic activation. Twenty-six lumbar STT cells were isolated. Nineteen were classified as wide dynamic range neurons and seven as high-threshold cells. Fifteen STT neurons were recorded in the deep dorsal horn (DDH) and 11 in superficial dorsal horn (SDH). The axons of 26 STT neurons were located at 73 low-threshold points (<30 microA) within the lateral funiculus from T(9) to C(6). STT neurons in the SDH were activated from 33 low-threshold points, neurons in the DDH from 40 low-threshold points. In lower thoracic segments, SDH neurons were antidromically activated from low-threshold points at the dorsal-ventral level of the denticulate ligament. Neurons in the DDH were activated from points located slightly ventral, within the ventral lateral funiculus. At higher segmental levels, axons from SDH neurons continued in a position dorsal to those of neurons in the DDH. However, axons from neurons in both areas of the gray matter were activated from points located in more ventral positions within the lateral funiculus. Unlike the suggestions in several previous reports, the present findings indicate that STT axons originating in the lumbar cord shift into increasingly ventral positions as they ascend the length of the spinal cord.
机译：脊髓丘脑束（STT）是从人的脊髓向大脑传递伤害性信息的主要途径。这项研究的目的是更好地了解猴子的脊髓白质内STT轴突的组织。 STT轴突的位置确定使用抗drodromic激活的方法。分离出26个腰椎STT细胞。 19个被分类为宽动态范围神经元，七个被分类为高阈值细胞。在深背角（DDH）中记录了15个STT神经元，在浅背角（SDH）中记录了11个。 26个STT神经元的轴突位于T（9）到C（6）的侧耳内73个低阈值点（<30 microA）。 SDH中的STT神经元从33个低阈值点被激活，DDH中的神经元从40个低阈值点被激活。在下胸段，SDH神经元从小齿状韧带的背腹水平的低阈值点被抗激活。 DDH中的神经元是从腹侧侧耳内侧腹侧的点激活的。在较高的节段水平上，SDH神经元的轴突继续位于DDH中神经元的背面。但是，来自灰质两个区域神经元的轴突是从位于侧耳内侧更多腹侧位置的点激活的。与以前的几篇报告中的建议不同，本研究结果表明，起源于腰椎的STT轴突随着其脊髓长度的增加而逐渐移向腹侧位置。

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