中枢神经系统-脊髓课件

1、 spinal cordXiaohua DengDepartment of Anatomy and NeurobiologyXiangya School of Medicine, CSUPosition and External FeaturesII. Internal Structure of Spinal CordIII. Reflex and Injury of Spinal Cord.position and external features1、位置2、外形颈膨大 Cervical enlargement腰骶膨大 Lumbosacral enlargement脊髓圆锥 Conus m

2、edullaris终丝 filum terminale前正中裂 anterior median fissure后正中沟 posterior median sulcus前外侧沟 anterolateral sulcus后外侧沟 posterolateral sulcus 3. Vertebral Levels of Spinal Cord Segments灰质 grey matter 前角anterior horn 后角posterior horn 中间带intermediate zone 侧角lateral horn白 质 white matter 前索anterior funiculus 后

3、索posterior funiculus 侧索lateral funiculus 网状结构 reticular formationII. Internal Structure of Spinal CordNerve nucleus of spinal cord and Rexed lamina model(脊髓神经核和Rexed分层模式)Grey matter lamina of spinal cord and corresponding structures脊髓灰质分层的对应关系 板层 板层 板层 板层. 板层 板层 板层 板层 板层 板层对应的核(或者部位)后角边缘核胶状质后角固有核后角颈

4、部后角基底部中间带(背核,中间内,外侧核)前角底部前角内侧核和外侧核中央灰质（2）Spinocerebellar tract脊髓小脑束脊髓小脑后束 Posterior spinocerebellar tract位置：外侧周边后半部起于：胸核（同侧为主）止于：小脑皮质脊髓小脑前束 Anterior spinocerebellar tract位置：外侧周边前半部起于：-板层外侧部止于：小脑皮质功能：此二束传递下肢 和躯干下部的深 感觉和外感觉信 息至小脑（3）Spinothalamic tract脊髓丘脑束脊髓丘脑侧束 lateral spinothalamic tract 脊髓丘脑前束 ante

5、rior spinothalamic tract位置：外侧索的前半部和前索前根内侧起于：对侧灰质、- 板层止于：丘脑腹后外侧核功能：传递痛、温觉和粗触、压觉 Descending Pathways:下行纤维传导束（运动传导束）皮质脊髓侧束 lateral corticospinal tract皮质脊髓前束 anterior corticospinal tractBarne前外侧束 anterolateral tract of Barne（1）皮质脊髓束 corticospinal tract（3）红核脊髓束 Rubrospinal tract位置：外侧索起于：中脑红核止于：-板层 功能：兴奋屈肌运动神经元（4）前庭脊髓束Vestibulospinal tract（5）内侧纵束 Medial longitudinal fasciculus屈曲反射flect