Pritz M B, Stritzel M E
Division of Neurological Surgery, California College of Medicine, University of California Irvine Medical Center, Orange 92668.
Brain Res. 1992 Jan 8;569(1):146-51. doi: 10.1016/0006-8993(92)90381-i.
Injections of horseradish peroxidase (HRP) into a caudocentral portion of the non-cortical telencephalon of Caiman known as the dorsolateral area (dorsal ventricular ridge) resulted in retrogradely labeled neurons throughout the entire extent of the ipsilateral nucleus reuniens. HRP-positive cells were most numerous in nucleus reuniens pars diffusa with only sparse labeling of neurons in nucleus reuniens pars centralis. The results of the present experiment, when compared with those of a prior study that determined the telencephalic connections of nucleus reuniens pars centralis, suggested that these two forebrain areas are separate. Staining with succinate dehydrogenase and acetylcholinesterase revealed that nucleus reuniens pars centralis and pars diffusa and their respective telencephalic projection areas can be differentiated on the basis of histochemical features. These findings in Caiman suggest that certain thalamic and telencephalic auditory areas in birds and crocodilians are most likely the result of common ancestry rather than examples of parallel evolution.
将辣根过氧化物酶（HRP）注射到凯门鳄非皮质端脑的尾中央部分，即所谓的背外侧区（背侧室嵴），导致同侧 reunien 核的整个范围内出现逆行标记的神经元。HRP 阳性细胞在 reunien 核弥散部最多，而 reunien 核中央部只有稀疏的神经元标记。与先前确定 reunien 核中央部端脑连接的研究结果相比，本实验结果表明这两个前脑区域是分开的。琥珀酸脱氢酶和乙酰胆碱酯酶染色显示，reunien 核中央部和弥散部及其各自的端脑投射区域可以根据组织化学特征进行区分。凯门鳄的这些发现表明，鸟类和鳄鱼的某些丘脑和端脑听觉区域很可能是共同祖先的结果，而不是平行进化的例子。
