【摘要】 用结合 HRP 逆行标记法,研究了12只大鼠斜方肌群运动神经元的中枢定位及其树突构筑。斜方肌群受副神经脊髓根和脊神经的双重支配,支配斜方肌群的副神经脊髓根标记细胞定位于 C₁～C₆节段内;支配斜方肌群的脊神经标记细胞定位于 C₃～C₅节段。标记神经元的树突分布区域有:①自前角细胞核向背侧达脊髓灰质第Ⅶ板层;②伸向同侧外侧索;③伸向同侧白质前索;④自中央管腹侧、背侧超越正中线;⑤伸向脊髓中央管;⑥构成白质内上、下行的纤维。更多还原

【Abstract】 Twelve adult rats were used for studying the location and dendritic organization of motonearons innervating the trapezius with the CT-HRP or CB-HR retrograde transport technique. The labeled cells of spinal accessory nerve were found in C₁—C₆ segment of the spinal cord.The labeled cells of spinal nerve anterior horn were found in C₃—C₅ segment.Dendritic organization of the label- ed cells was satisfactorily shown:some dendrites extend to central canal; some extend to the anterior funiculus and the lateral funiculus of the same side,etc.更多还原