Orbitofrontal dysfunction discriminates behavioral variant frontotemporal dementia from Alzheimer's disease
M Hornberger1, S Savage, S Hsieh
1Neuroscience Research Australia, Barker & Easy Streets, Randwick, Sydney, NSW 2031, Australia. m.hornberger@neura.edu.au
Dementia and Geriatric Cognitive Disorders
|January 22, 2011
Summary
Diagnosing behavioral variant frontotemporal dementia (bvFTD) and Alzheimer's disease (AD) is improved by assessing executive function and prefrontal cortex atrophy. Combining these measures accurately differentiates patients, aiding early diagnosis.
Area of Science:
- Neuroscience
- Neurology
- Cognitive Science
Background:
- Behavioral variant frontotemporal dementia (bvFTD) is characterized by prefrontal cortex dysfunction and atrophy.
- Differentiating bvFTD from Alzheimer's disease (AD) is crucial for accurate diagnosis and treatment.
Purpose of the Study:
- To investigate the efficacy of executive function tests and prefrontal cortex atrophy in discriminating between bvFTD and AD patients.
- To determine if a combined approach offers superior diagnostic accuracy.
Main Methods:
- Evaluated executive functions using the Hayling Test of Inhibitory Control, Digit Span Backward, and Letter Fluency.
- Assessed prefrontal cortex atrophy, specifically orbitofrontal cortex (OFC) and dorsolateral prefrontal cortex, using scan ratings.
- Correlated executive task performance and atrophy ratings for diagnostic classification.
Main Results:
- Executive function tasks distinguished AD and bvFTD patients with 89.5% accuracy.
- OFC and dorsolateral prefrontal cortex atrophy also differentiated the patient groups.
- Combining the Hayling error score with OFC atrophy rating achieved 92% correct classification.
Conclusions:
- Executive function measures, particularly disinhibition, combined with OFC atrophy assessment, show significant potential for differentiating bvFTD from AD.
- This preliminary study suggests a powerful diagnostic tool for clinical use.
Related Concept Videos
01:21Association Areas of the Cortex
Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
01:22Dementia l: Introduction
Dementia is an acquired, progressive syndrome characterized by a decline in multiple cognitive domains severe enough to impair daily functioning and reduce independence. Although memory loss is a central feature, the diagnosis requires additional deficits involving language, executive function, visuospatial skills, judgment, calculation, or abstract reasoning. These cognitive impairments reflect underlying neurodegenerative or vascular processes that gradually disrupt neuronal networks...
01:26Alzheimer's Disease: Overview
Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ and tau...
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ and tau...
01:30Oppositional Defiant Disorder
A persistent pattern of angry or irritable mood, defiant behavior, or vindictiveness characterizes Oppositional Defiant Disorder (ODD). Symptoms must occur over at least six months, involve interactions with individuals beyond siblings, and meet specific diagnostic criteria to be clinically significant. The disorder affects emotional regulation, social interactions, and behavior, often manifesting early in life and influencing long-term development and functioning.
Diagnostic Criteria and...
Diagnostic Criteria and...
01:29Alzheimer Disease l: Introduction
Alzheimer disease is a chronic, progressive, and irreversible neurodegenerative disorder and the most common cause of dementia in older adults. It leads to gradual neuronal loss, causing cognitive decline, behavioral changes, and loss of functional independence.Risk Factors and EtiologyThe disease is multifactorial. Age is the strongest risk factor, with prevalence doubling every 5 years after age 65. Genetic factors include mutations in genes such as APP, PSEN1, and PSEN2, which are associated...