Kruska D, Schott U
J Hirnforsch. 1977;18(1):59-67.
By means of serial sections at equal intervals through the brains of 8 Norway rats and 8 laboratory rats the fresh volume sizes of the optic regions lateral geniculate nucleus (pars dorsalis), striate area, superior colliculus and tractus opticus were determined. Furthermore the sizes of neocortical white matter and grey matter were measured in the same way. On the basis of the intraspecific allometric relation between brain size and body size differences in size of the structures between wild and domestic animals could be established. Especially the subcortical terminal regions of visual input and the striate area showed size reductions of different intensity from Norway to laboratory rats, whereas the optic tract underwent increase. The volume of grey matter showed decrease too and for the white matter no size differences between both groups came out as a result. These changes in size of nervous tissue from Norway rats to laboratory rats were partly discussed as due to the special changes of environment through domestication but in this special case also as due to the effect caused by the albinism of the investigated laboratory rats.
通过对8只挪威大鼠和8只实验大鼠的大脑进行等间隔连续切片，测定了视觉区域外侧膝状体（背侧部）、纹状区、上丘和视束的新鲜体积大小。此外，还以同样的方式测量了新皮质白质和灰质的大小。基于脑大小与身体大小之间的种内异速生长关系，可以确定野生动物和家养动物之间结构大小的差异。特别是从挪威大鼠到实验大鼠，视觉输入的皮质下终末区域和纹状区显示出不同程度的大小减小，而视束则增大。灰质体积也减小，两组之间白质大小没有差异。从挪威大鼠到实验大鼠神经组织大小的这些变化，部分原因被认为是由于驯化导致的环境特殊变化，但在这种特殊情况下，也归因于所研究实验大鼠白化病所造成的影响。
