Cognitive Functions

Cognitive functions are the mental processes by which a person attends to, remembers, manipulates, and acts on information, including attention, memory, language, and the executive functions that organise goal-directed behaviour. In occupational therapy these functions are examined because they underlie the planning, sequencing, problem-solving, and judgement required to carry out everyday occupations.

Definition

Cognitive functions are the mental processes that acquire, store, transform, and use information, including attention, memory, language, perception, and the executive functions (inhibition, working memory, and cognitive flexibility) that regulate goal-directed thought and action.

Scope

This topic covers cognition as a person-level body function supporting occupational performance: attention and working memory, long-term memory, executive functions, and the cognitive control that coordinates them. It is a reference subject linking cognitive neuroscience and neuropsychology to participation in daily life. Detailed neuropsychological test protocols and individualised rehabilitation plans are out of scope.

Core questions

• What are the core executive functions and how do they support everyday behaviour?
• How does attention allocate limited processing resources?
• How does the brain detect conflict and adjust cognitive control?
• How do cognitive functions change with healthy aging and with neurological conditions?

Key concepts

• Attention and selective attention
• Working memory
• Long-term memory
• Executive functions (inhibition, updating, shifting)
• Cognitive control
• Processing speed
• Metacognition

Key theories

Core executive functions framework

Higher cognition is organised around three core executive functions, inhibitory control, working memory, and cognitive flexibility, which combine to support higher-order skills such as reasoning, problem-solving, and planning.

Conflict monitoring and cognitive control

A monitoring system, associated with the anterior cingulate cortex, detects conflict between competing responses and signals for increased top-down control, providing a mechanism by which the system adjusts attention and effort to task demands.

Mechanisms

Cognition depends on distributed networks in which prefrontal and parietal regions support attention, working memory, and executive control, while medial-temporal structures support the encoding and retrieval of long-term memory. Cognitive control is engaged dynamically: a monitoring process detects conflict among competing responses and recruits additional top-down control to bias processing toward task goals. Across the lifespan these systems are not fixed; aging brains can recruit additional neural resources to compensate for declines, a scaffolding process that helps preserve performance.

Clinical relevance

Cognitive functions underlie the planning, sequencing, attention, and judgement that everyday occupations require, so changes in cognition after stroke, brain injury, or with aging can affect a person's participation. This entry explains the relevant constructs as a reference; it does not recommend specific assessments or cognitive interventions or give individualised advice.

Evidence & guidelines

The constructs here draw on cognitive neuroscience and neuropsychology: reviews synthesise the structure of executive functions and the mechanisms of cognitive control, while lifespan accounts describe compensatory changes with aging. Standard neuropsychology references compile the measurement of these functions. These are largely theoretical and observational sources rather than clinical guidelines.

History

Twentieth-century neuropsychology established that distinct mental functions can be selectively impaired by brain lesions, grounding the idea of separable cognitive systems. The cognitive-neuroscience era added process models, such as conflict monitoring for cognitive control, and integrative frameworks of executive function, while lifespan research reframed aging cognition in terms of decline alongside compensation.

Debates

How unified or separable are the executive functions?

Research describes executive function as both a single broad capacity and a set of partially separable components (inhibition, updating, shifting); how to weigh the common factor against the distinct components remains an active question.

Key figures

• Adele Diamond
• Matthew Botvinick
• Jonathan Cohen
• Denise Park
• Muriel Lezak

Seminal works

• botvinick-2001
• diamond-2013
• park-reuter-lorenz-2009

Frequently asked questions

What are executive functions?

Executive functions are a set of top-down mental processes, centred on inhibitory control, working memory, and cognitive flexibility, that allow a person to plan, focus attention, hold and manipulate information, and adjust behaviour to changing goals.

Why are cognitive functions important in occupational therapy?

Because everyday occupations require attention, memory, problem-solving, and judgement; understanding cognitive functions helps explain why participation in daily activities can change after neurological injury or with aging.