Plogmann D, Kruska D
Institut für Haustierkunde, Christian-Albrechts-Universität, Kiel, BRD.
Brain Behav Evol. 1990;35(3):146-55. doi: 10.1159/000115863.
The size of certain brain parts involved in the processing of auditory stimuli was measured in European wild boars (Sus scrofa) and domestic pigs (Sus scrofa f. dom.). By means of intraspecific allometric methods for analyzing the brain weight to body weight relationships, the volumes were compared in both groups. In general, all measured structures were smaller in the domestic form, indicating that domestication has led to a decrease in the size of auditory brain parts. Within the auditory system, however, differences in the amount of decrease were observed in different structures. The cochlear nucleus is only 15% smaller and the medial geniculate body about 20% smaller in the domestic form, whereas the superior olive (28%), the inferior colliculus (28%), the grey matter of the auditory cortex (32%) and the lateral lemniscus (33%) are decreased more significantly. Furthermore, in the medial superior olivary nucleus, there are 9% fewer neurons in the domestic form, but the neuron density has increased by 28%.
在欧洲野猪（Sus scrofa）和家猪（Sus scrofa f. dom.）中测量了参与听觉刺激处理的某些脑区的大小。通过种内异速生长方法分析脑重与体重的关系，对两组的体积进行了比较。总体而言，家猪中所有测量的结构都较小，这表明驯化导致了听觉脑区大小的减小。然而，在听觉系统内，不同结构的减小量存在差异。家猪中蜗神经核仅小15%，内侧膝状体小约20%，而 Superior olive（上橄榄核，28%）、下丘（28%）、听觉皮层灰质（32%）和外侧丘系（33%）减小得更显著。此外，在家猪的内侧上橄榄核中，神经元数量少9%，但神经元密度增加了28%。
