Abstract: Implicit learning may require a certain amount of attention and working memory, but there are still some controversies on their roles in implicit learning; with the development of the study of implicit serial learning, more and more researchers have paid attention to the representation of implicit serial knowledge, which provides a new way for searching for the underlying mechanism of representation of the implicit knowledge; there is evidence that the brain areas such as the basal ganglia, association cortex, frontal lobes may be involved in implicit learning

Key words: implicit learning, attentional systems, working memory, representation, neural substrates