Subject-specific segregation of functional territories based on deep phenotyping was published in the Human Brain Mapping journal and integrates the first volume of March 2021. In this article, we develop an individual-functional-atlasing approach to link functional segregation of specialized brain regions to elementary mental functions, by leveraging the first release of the Individual-Brain-Charting dataset. Results show that individual cognitive topographies, common to all tasks, are consistently mapped within as well as across participants and they reveal the contribution of each task to these common representations through the contrast-maps prediction scores of every task obtained from the individual contrast maps of the remaining tasks.