In cognitive psychology, the working memory system refers to a system of mental resources that can be allocated to hold information in a way that makes it easily accessible to retrieve. The central executive is a central aspect of this system, which relies on various subsystems (or low-level assistants) to maintain its function (Reisberg, 2018). These subsystems, or low-level assistans, as Daniel Reisberg calls them, include the visuospatial buffer and the articulatory rehearsal loop (Rahm, 2018).
Rahm, C. (2018). Neurovetenskaplig psykiatri. Stockholm, Sverige: Natur & Kultur.
Reisberg, D. (2018). Cognition: Exploring the Science of the Mind. 7th Edition. New York: W. W. Norton & Company.