от греч. μίτος — нить и χόνδρος — зёрнышко, крупинка.

Are intrasulcal cortices involved in higher cognitive processing?

It has also been hypothesized that the intrasulcal cortices may play a distinctive role in higher cognitive processing, because the most rapid changes in neuronal activity are frequently observed in the sulcal fundi.
Markowitsch HJ, Tulving E. Cognitive processes and cerebral cortical fundi. NeuroReport, 1995:15,413—418.