Summary
The area gigantopyramidalis has been circumscribed on frontal serial sections of brains of mouflons (Ovis ammon musimon) and domestic sheep (Ovis ammon f. aries). A brief description of the topography and lamination of the area 4 is given.
By means of intraspecific-allometric methods this area has shown a decrease in volume by 29.9% in domestic sheep compared with wild sheep.
In view of the close relationship between size and function of a structure the reduction rates of the area gigantopyramidalis, the cerebellum and the basal ganglia are discussed as due to the special environmental changes caused by domestication.
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Ebinger, P. A cytoarchitectonic volumetric comparison of the area gigantopyramidalis in wild and domestic sheep. Anat Embryol 147, 167–175 (1975). https://doi.org/10.1007/BF00306731
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DOI: https://doi.org/10.1007/BF00306731