Working memory

Working memory, a core executive function, is a cognitive system with a limited capacity that is responsible for the transient holding, processing, and manipulation of information. Working memory is an important process for reasoning and the guidance of decision making and behavior. Working memory is often used synonymously with short-term memory, but neuropsychologists have noted that the two forms of memory are distinct, particularly since they arise from different neural subsystems within the prefrontal cortex. Working memory is a short-term memory buffer that allows for the manipulation of stored information, while short-term memory is only involved in the short-term storage of information and does not entail the manipulation or organization of material held in memory. Working memory also develops later and at a slower pace than short-term memory.

The multiple-component models of working memory include proposed subsystems that store and manipulate visual images or verbal information, as well as a central executive that coordinates the subsystems. It includes visual representation of the possible moves, and awareness of the flow of information into and out of memory, all stored for a limited amount of time. Working memory is essential for navigating complex cognitive tasks such as comprehension, learning and reasoning. Working memory, categorization, and reasoning have been shown as related functions of structural organization theory. Working memory tasks require monitoring (i.e., the manipulation of information or behaviors) as part of completing goal-directed actions in the setting of interfering processes and distractions. The cognitive processes needed to achieve this include the executive and attention control of short-term memory, which permit the interim integration, processing, disposal, and retrieval of information. These processes are sensitive to age: working memory is associated with cognitive development, and research shows that its capacity tends to decline with old age. Working memory is a theoretical concept central both to cognitive psychology and neuroscience.

Theories exist both regarding the theoretical structure of working memory and the role of specific parts of the brain involved in working memory. Research identifies the frontal cortex, parietal cortex, anterior cingulate cortex, and parts of the basal ganglia as crucial. The neural basis of working memory has been derived from lesion experiments in animals and functional imaging in humans.

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