Künzle H, Woodson W
Anat Embryol (Berl). 1983;166(2):229-45. doi: 10.1007/BF00305085.
Primary afferent projections from cervical and lumbar levels were studied in the turtle Pseudemys scripta elegans. Injections of radioactive amino acids, wheat germ agglutinin and horseradish peroxidase were made into the dorsal root ganglia or the spinal cord. Previous reports on the terminal distribution of primary afferents within the ipsilateral segment of entry were confirmed (Kusuma and ten Donkelaar 1979, 1980) and additional dorsal root projections were demonstrated to the contralateral side and to several neighboring spinal segments. The primary afferent projections to the brainstem were essentially restricted to a dorsolateral area that appears to be homologous to the main dorsal column nuclei (n. gracilis and n. cuneatus medialis) in mammals. While exhibiting a similarly extensive rostro-caudal span, the projections originating from lumbar injections terminated more medially, those from cervical injections more laterally. The labeling pattern suggested that terminations are mainly on dorsally extending dendrites.
在锦龟（Pseudemys scripta elegans）中研究了来自颈部和腰部水平的初级传入投射。将放射性氨基酸、小麦胚凝集素和辣根过氧化物酶注射到背根神经节或脊髓中。先前关于初级传入纤维在同侧进入节段内终末分布的报道得到了证实（Kusuma和ten Donkelaar，1979年，1980年），并且还证明了额外的背根投射到对侧和几个相邻的脊髓节段。向脑干的初级传入投射基本上局限于一个背外侧区域，该区域似乎与哺乳动物的主要背柱核（薄束核和内侧楔束核）同源。虽然在前后方向上具有相似的广泛跨度，但来自腰部注射的投射在更内侧终止，来自颈部注射的投射在更外侧终止。标记模式表明终末主要位于背向延伸的树突上。
