Engbretson G A, Reiner A, Brecha N
J Comp Neurol. 1981 May 1;198(1):155-65. doi: 10.1002/cne.901980113.
Histochemical and autoradiographic analyses of the axonal transport of horseradish peroxidase and tritiated amino acids were employed to study the central connectivity of the lizard parietal eye. Somata and processes of centrifugal fibers to the parietal eye were localized in tissue of the dorsal sac and in the leptomeningeal sheath of the pineal gland. Analyses of series of transverse sections of the brain showed the left medial habenular nucleus to be subdivided into pars dorsolateralis and pars ventromedialis, and the right medial habenular nucleus not to be so subdivided. Centripetal fibers of parietal eye ganglion cells project to only the pars dorsolateralis of the left medial habenular nucleus and terminate there in two distinct fields. The asymmetry of the lizard habenula may be a specialization associated with the unilateral projection from the parietal eye.
采用辣根过氧化物酶和氚标记氨基酸轴突运输的组织化学和放射自显影分析方法，研究蜥蜴顶眼的中枢连接性。向顶眼发出离心纤维的胞体和突起定位于背囊组织和松果体软脑膜鞘内。对脑的一系列横切片分析表明，左侧内侧缰核可分为背外侧部和腹内侧部，而右侧内侧缰核未如此划分。顶眼神经节细胞的向心纤维仅投射到左侧内侧缰核的背外侧部，并在那里终止于两个不同的区域。蜥蜴缰核的不对称性可能是与顶眼单侧投射相关的一种特化。
