Most current neurally-based models of human cognition focus on a single narrow domain, such as visual pattern recognition; The Cognitive Brain proposes a theoretical model of integrated mechanisms that can account for human cognitive competence on many basic tasks in visual-cognitive and lexical-semantic domains. Trehub's detailed and biologically plausible model of the cognitive brain covers functions such as learning, imagery, stereopsis, pattern recognition, scene assembly, analysis of spatial relations, object search, semantic processing, narrative comprehension, planning, and motivation