Montreal Cognitive Assessment | |
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Synonyms | Montreal test |
Purpose | Evaluation of cognitive deficit and Alzheimer's disease |
Test of | Cognitive skill |
The Montreal Cognitive Assessment (MoCA) is a widely used screening assessment for detecting cognitive impairment. [1] It was created in 1996 by Ziad Nasreddine in Montreal, Quebec. It was validated in the setting of mild cognitive impairment (MCI), and has subsequently been adopted in numerous other clinical settings. This test consists of 30 points and takes 10 minutes for the individual to complete. The original English version is performed in seven steps, which may change in some countries dependent on education and culture. The basics of this test include short-term memory, executive function, attention, focus, and more.
The MoCA is a one-page 30-point test administered in approximately 10 minutes. [2] The test and administration instructions are available for clinicians online. The test is available in 46 languages and dialects (as of 2017).
The MoCA assesses several cognitive domains:
Because MoCA is English-specific, linguistic and cultural translations are made in order to adapt the test in other countries. Multiple cultural and linguistic variables may affect the norms of the MoCA across different countries and languages, e.g. Swedish. [3] Several cut-off scores have been suggested across different languages to compensate for the education level of the population, and several modifications were also necessary to accommodate certain linguistic and cultural differences across different languages or countries; however, not all versions have been validated.
A MoCA test validation study by Nasreddine in 2005 showed that the MoCA was a promising tool for detecting MCI and early Alzheimer's disease compared with the well-known Mini-Mental State Examination (MMSE). [1]
According to the validation study, the sensitivity and specificity of the MoCA for detecting MCI were 90% and 87% respectively, compared with 18% and 100% respectively for the MMSE. Subsequent studies in other settings were less promising, though generally superior to the MMSE. [4] [5]
Other studies have tested the MoCA on patients with Alzheimer's disease. [6] [7] [8]
People with hearing loss, which commonly occurs alongside dementia, score worse in the MoCA test, which could lead to a false diagnosis of dementia. Researchers have developed an adapted version of the MoCA test, which is accurate and reliable and avoids the need for people to listen and respond to questions. [9] [10]
The National Institutes of Health and the Canadian Stroke Network recommended selected subsets of the MoCA for the detection of vascular cognitive impairment. [11]
MoCA scores range between 0 and 30. [12] A score of 26 or over is considered to be normal. In a study, people without cognitive impairment scored an average of 27.4; people with MCI scored an average of 22.1; people with Alzheimer's disease scored an average of 16.2. [12]
In a study by Ihle-Hansen et al. (2017), of 3,413 Norwegian participants aged 63–65, of whom 47% had higher education (over 12 years), under 5% of subjects scored 30/30 with a mean MoCA score of 25.3 and 49% scoring below the suggested cut-off of 26 points, leading the authors to suggest that "the cut-off score may have been set too high to distinguish normal cognitive function from MCI". [13]
Since the MoCA assesses multiple cognitive domains, it can be a useful cognitive screening tool for several neurological diseases that affect younger populations, such as Parkinson's disease, [14] [15] [16] vascular cognitive impairment, [17] [18] Huntington's disease, [19] brain metastasis, sleep behaviour disorder, [20] primary brain tumors (including high- and low-grade gliomas), [21] multiple sclerosis and other conditions such as traumatic brain injury, cognitive impairment from schizophrenia [ citation needed ] and heart failure. The test is also used in hospitals to determine whether patients should be allowed to live alone or with a home aide.
Nikki Haley campaigned for the Republican presidential nomination partially on a platform plank that would have required all politicians aged 75 or older take the MoCA. [22] This proposal would have required both incumbent President Joe Biden and former President Donald Trump, but not Haley, take the MoCA. Trump was given the MoCA in 2018 by then–White House physician Ronny Jackson. Trump's repeated use of the phrase "Person, woman, man, camera, TV" while describing the test became an Internet meme and went viral on social media platforms. [23] According to The Washington Post , Trump has frequently distorted or misrepresented the nature of the test. [24] Amid concerns about his age and health, Biden declined to undergo a cognitive exam, stating that he has "a cognitive test every single day" in performing his presidential duties. [25]
Dementia is a syndrome associated with many neurodegenerative diseases, characterized by a general decline in cognitive abilities that affects a person's ability to perform everyday activities. This typically involves problems with memory, thinking, behavior, and motor control. Aside from memory impairment and a disruption in thought patterns, the most common symptoms of dementia include emotional problems, difficulties with language, and decreased motivation. The symptoms may be described as occurring in a continuum over several stages. Dementia ultimately has a significant effect on the individual, their caregivers, and their social relationships in general. A diagnosis of dementia requires the observation of a change from a person's usual mental functioning and a greater cognitive decline than might be caused by the normal aging process.
Dementia with Lewy bodies (DLB) is a type of dementia characterized by changes in sleep, behavior, cognition, movement, and regulation of automatic bodily functions. Memory loss is not always an early symptom. The disease worsens over time and is usually diagnosed when cognitive impairment interferes with normal daily functioning. Together with Parkinson's disease dementia, DLB is one of the two Lewy body dementias. It is a common form of dementia, but the prevalence is not known accurately and many diagnoses are missed. The disease was first described on autopsy by Kenji Kosaka in 1976, and he named the condition several years later.
Rapid eye movement sleep behavior disorder or REM sleep behavior disorder (RBD) is a sleep disorder in which people act out their dreams. It involves abnormal behavior during the sleep phase with rapid eye movement (REM) sleep. The major feature of RBD is loss of muscle atonia during otherwise intact REM sleep. The loss of motor inhibition leads to sleep behaviors ranging from simple limb twitches to more complex integrated movements that can be violent or result in injury to either the individual or their bedmates.
Neuropsychological tests are specifically designed tasks that are used to measure a psychological function known to be linked to a particular brain structure or pathway. Tests are used for research into brain function and in a clinical setting for the diagnosis of deficits. They usually involve the systematic administration of clearly defined procedures in a formal environment. Neuropsychological tests are typically administered to a single person working with an examiner in a quiet office environment, free from distractions. As such, it can be argued that neuropsychological tests at times offer an estimate of a person's peak level of cognitive performance. Neuropsychological tests are a core component of the process of conducting neuropsychological assessment, along with personal, interpersonal and contextual factors.
Cognitive disorders (CDs), also known as neurocognitive disorders (NCDs), are a category of mental health disorders that primarily affect cognitive abilities including learning, memory, perception, and problem-solving. Neurocognitive disorders include delirium, mild neurocognitive disorders, and major neurocognitive disorder. They are defined by deficits in cognitive ability that are acquired, typically represent decline, and may have an underlying brain pathology. The DSM-5 defines six key domains of cognitive function: executive function, learning and memory, perceptual-motor function, language, complex attention, and social cognition.
The mini–mental state examination (MMSE) or Folstein test is a 30-point questionnaire that is used extensively in clinical and research settings to measure cognitive impairment. It is commonly used in medicine and allied health to screen for dementia. It is also used to estimate the severity and progression of cognitive impairment and to follow the course of cognitive changes in an individual over time; thus making it an effective way to document an individual's response to treatment. The MMSE's purpose has been not, on its own, to provide a diagnosis for any particular nosological entity.
Cognitive impairment is an inclusive term to describe any characteristic that acts as a barrier to the cognition process or different areas of cognition. Cognition, also known as cognitive function, refers to the mental processes of how a person gains knowledge, uses existing knowledge, and understands things that are happening around them using their thoughts and senses. Cognitive impairment can be in different domains or aspects of a person's cognitive function including memory, attention span, planning, reasoning, decision-making, language, executive functioning, and visuospatial functioning. The term cognitive impairment covers many different diseases and conditions and may also be symptom or manifestation of a different underlying condition. Examples include impairments in overall intelligence, specific and restricted impairments in cognitive abilities, neuropsychological impairments, or it may describe drug-induced impairment in cognition and memory. Cognitive impairments may be short-term, progressive, or permanent.
Mild cognitive impairment (MCI) is a neurocognitive disorder which involves cognitive impairments beyond those expected based on an individual's age and education but which are not significant enough to interfere with instrumental activities of daily living. MCI may occur as a transitional stage between normal aging and dementia, especially dementia due to Alzheimer's disease. It includes both memory and non-memory impairments. About 50 percent of people diagnosed with MCI have Alzheimer's disesae and go on to develop Alzheimer's dementia within five years. MCI can also serve as an early indicator for other types of dementia, although MCI may remain stable or even remit.
The MCI Screen is a brief neuropsychological test checking for mild cognitive impairment (MCI).
Psychological therapies for dementia are starting to gain some momentum. Improved clinical assessment in early stages of Alzheimer's disease and other forms of dementia, increased cognitive stimulation of the elderly, and the prescription of drugs to slow cognitive decline have resulted in increased detection in the early stages. Although the opinions of the medical community are still apprehensive to support cognitive therapies in dementia patients, recent international studies have started to create optimism.
A verbal fluency test is a kind of psychological test in which a participant is asked to produce as many words as possible from a category in a given time. This category can be semantic, including objects such as animals or fruits, or phonemic, including words beginning with a specified letter, such as p, for example. The semantic fluency test is sometimes described as the category fluency test or simply as "freelisting", while letter fluency is also referred to as phonemic test fluency. The Controlled Oral Word Association Test (COWAT) is the most employed phonemic variant. Although the most common performance measure is the total number of words, other analyses such as number of repetitions, number and length of clusters of words from the same semantic or phonemic subcategory, or number of switches to other categories can be carried out.
Alzheimer's disease (AD) is a neurodegenerative disease that usually starts slowly and progressively worsens, and is the cause of 60–70% of cases of dementia. The most common early symptom is difficulty in remembering recent events. As the disease advances, symptoms can include problems with language, disorientation, mood swings, loss of motivation, self-neglect, and behavioral issues. As a person's condition declines, they often withdraw from family and society. Gradually, bodily functions are lost, ultimately leading to death. Although the speed of progression can vary, the average life expectancy following diagnosis is three to twelve years.
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The General Practitioner Assessment of Cognition (GPCOG) is a brief screening test for cognitive impairment introduced by Brodaty et al. in 2002. It was specifically developed for the use in the primary care setting.
Alzheimer's Disease Neuroimaging Initiative (ADNI) is a multisite study that aims to improve clinical trials for the prevention and treatment of Alzheimer's disease (AD). This cooperative study combines expertise and funding from the private and public sector to study subjects with AD, as well as those who may develop AD and controls with no signs of cognitive impairment. Researchers at 63 sites in the US and Canada track the progression of AD in the human brain with neuroimaging, biochemical, and genetic biological markers. This knowledge helps to find better clinical trials for the prevention and treatment of AD. ADNI has made a global impact, firstly by developing a set of standardized protocols to allow the comparison of results from multiple centers, and secondly by its data-sharing policy which makes available all at the data without embargo to qualified researchers worldwide. To date, over 1000 scientific publications have used ADNI data. A number of other initiatives related to AD and other diseases have been designed and implemented using ADNI as a model. ADNI has been running since 2004 and is currently funded until 2021.
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The Addenbrooke's Cognitive Examination (ACE) and its subsequent versions are neuropsychological tests used to identify cognitive impairment in conditions such as dementia.
The Saint Louis University Mental Status (SLUMS) Exam is a brief screening assessment used to detect cognitive impairment. It was developed in 2006 at the Saint Louis University School of Medicine Division of Geriatric Medicine, in affiliation with a Veterans' Affairs medical center. The test was initially developed using a veteran population, but has since been adopted as a screening tool for any individual displaying signs of mild cognitive impairment. The intended population typically consists of individuals 60 years and above that display any signs of cognitive deficit. Unlike other widely-used cognitive screens, such as the Mini-Mental State Examination and Montreal Cognitive Assessment, the SLUMS is free to access and use by all healthcare professionals.
The Self-administered Gerocognitive Examination is a brief cognitive assessment instrument for mild cognitive impairment (MCI) and early dementia, created by Douglas Scharre, Professor of Clinical Neurology and Psychiatry at Ohio State University Wexner Medical Center in Columbus, Ohio.
Ziad Nasreddine is a Canadian neurologist notable for creating the Montreal Cognitive Assessment (MoCA) in 2005, widely used to assess mild cognitive impairment.