CoCoMac (Collations of Connectivity data on the Macaque brain) is a website developed by the Computational Systems Neuroscience Group at the C. &. O. Vogt brain Research Institute in Düsseldorf, Germany. It represents their approach to producing a systematic record of the known wiring of the primate brain. The main database contains details of hundreds of tracing studies in their original descriptions. Further data are continuously added. The group uses CoCoMac data to analyse the organisation of the cerebral cortex and to establish its structure-function relationships. This includes multi-variate statistics and computer simulation of models that take into account the internal structure of the primate cerebral cortex as described in several hundred research articles from the primate brain research literature.