When Working Memory isn’t Working: How and Why, and What it Means for Patients with Schizophrenia
Stephen I. Deutsch, MD, PhD
Anne Armistead Robinson Endowed Chair in Psychiatry; Professor and Chairman, Department of Psychiatry and Behavioral Sciences, Eastern Virginia Medical School; Attending Psychiatrist, Sentara Norfolk General Hospital, Norfolk, Va.
Disclosure: Dr. Deutsch has received grant support from the Commonwealth Health Research Board (State of Virginia).
INTRODUCTION
Working memory is the ability to retain information on-line for short periods of time—seconds to minutes—in order to use this information to guide goal-directed behavior, eg, retention of a telephone number long enough to actually make the call. Working memory is commonly referred to as the “mental sketchpad” and is itself composed of component processes that are necessary for maintaining relevant information during encoding, inhibiting encoded information that is irrelevant to the desired goal from entering consciousness, and minimizing interference from distractors or irrelevant information at the time of retrieval when a goal-directed response is chosen, among other processes. Working memory is critical to learning, reasoning, verbal comprehension, and academic and vocational success, so it is perhaps unsurprising that a deficit in working memory—a cognitive deficit—would be likely to contribute to the poorer functional outcomes experienced by many schizophrenia patients.1
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