Superficial and deep blood vessel distribution in the frog telencephalon. Reference to morphological brain asymmetries

Nine frogs of the species "Rana esculenta" were heart perfused with Microfile Silicone Rubber. The frogs were examined both after dissection (cut with a razor blade) to study the superficial blood vessel pattern, and histologically (the Nissl staining method) to study the distribution of the deep blood capillaries. While the superficial blood vary in pattern, the deep capillaries are distributed symmetrically. This finding does not support a correlation between blood vessel pattern and morphological brain asymmetry, at least in the frog, and thus other explanations must be sought to explain brain asymmetry.