Lee B H, Hassler R G, Chung Y W, Hasegawa Y, Nitsch F M
Acta Anat (Basel). 1985;123(1):1-8. doi: 10.1159/000146029.
Stereotactic coagulations of intralaminar thalamic nuclei in 6 squirrel monkeys Saimiri sciureus produced dark degenerations only of type IV synapses in pallidum externum, according to the classification of Hassler and Chung often preserving the slightly asymmetric contact and subsynaptic densities. Other type IV boutons underwent semidark degeneration, whereas others showed crystalloid degeneration. Some of type IV boutons show the deposition of many dense core vesicles and mitochondria with loss of most synaptic vesicles. Enlarged type IV boutons are sometimes overcrowded with irregularly shaped lysosomes. Thus, a monosynaptic connections of intralaminar thalamic nuclei to pallidum externum could be demonstrated.
对6只松鼠猴（松鼠猴属）的板内核进行立体定向凝固，根据哈斯勒和钟的分类，仅在苍白球外侧产生了IV型突触的深色退变，通常保留了轻微不对称的接触和突触下密度。其他IV型终扣经历了半深色退变，而其他终扣则表现出晶体样退变。一些IV型终扣显示出许多致密核心囊泡和线粒体的沉积，同时大多数突触囊泡丢失。增大的IV型终扣有时充满了形状不规则的溶酶体。因此，可以证明板内核与苍白球外侧之间存在单突触连接。
