Dysexecutive syndrome

Dysexecutive syndrome (DES) consists of a group of symptoms, usually resulting from brain damage, that fall into cognitive, behavioural and emotional categories and tend to occur together. The term was introduced by Alan Baddeley to describe a common pattern of dysfunction in executive functions, such as planning, abstract thinking, flexibility and behavioural control. It is thought to be Baddeley's hypothesized working memory system and the central executive that are the hypothetical systems impaired in DES. The syndrome was once known as frontal lobe syndrome, however dysexecutive syndrome is preferred because it emphasizes the functional pattern of deficits (the symptoms) over the location of the syndrome in the frontal lobe, which is often not the only area affected. Classification code in ICD-10 - F07

Symptoms of DES fall into three broad categories: cognitive, emotional and behavioural. Many of the symptoms can be seen as a direct result of impairment to the central executive component of working memory, which is responsible for attentional control and inhibition. Although many of the symptoms regularly co-occur, it is common to encounter patients who have several, but not all symptoms. The accumulated effects of the symptoms have a large impact on daily life.

Cognitive symptoms refer to a person's ability to process thoughts. Cognition primarily refers to memory, the ability to learn new information, speech, and reading comprehension. Deficits within this area cause many problems with every day life decisions.

One of the main difficulties for an individual with DES is planning and reasoning. Impaired planning and reasoning affect the individual's ability to realistically assess and manage the problems of every day living. New problems and situations may be especially poorly handled because of the inability to transfer previous knowledge to the new event. An individual that has DES may have a short attention span due to impairment in attentional control. This may alter the individual's ability to focus, and as such have difficulty with reading and following a storyline or conversation. For instance, they can easily lose track of conversations which can make it difficult to hold a meaningful conversation and may result in avoiding social interactions.

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