Referential framework for transcranial anatomical correspondence for fNIRS based on manually traced sulci and gyri of an infant brain.

•fNIRS is suitable for monitoring infant brain functions.•Resources for structural analyses of infant brains are limited.•Lateral cortical structures of 12-month-old infant MRI data were manually traced.•Infant cortical atlas was linked to spherical coordinate and 10-20-based systems.•Macroanatomical referential framework for infant fNIRS studies was established.