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Published in: BMC Neurology 1/2023

Open Access 01-12-2023 | Frontotemporal Dementia | Research

Electroencephalography in young onset dementia

Authors: Casey W Brown, Huei-Yang Chen, Peter K Panegyres

Published in: BMC Neurology | Issue 1/2023

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Abstract

Background

Young onset dementia (YOD) is a major diagnostic and management problem.

Methods

We set out to explore if electroencephalography (EEG) might be useful in the diagnosis of young onset Alzheimer’s disease (YOAD) and young onset frontotemporal dementia (YOFTD). The ARTEMIS project is a 25-year prospective study of YOD based in Perth, Western Australia. 231 participants were included: YOAD: n = 103, YOFTD: n = 28, controls: n = 100. EEGs were performed prospectively, with 30-minute recording time for each subject, without knowledge of diagnosis or other diagnostic data.

Results

80.9% of patients with YOD had abnormal EEGs (P < 0.00001). Slow wave changes were more frequent in YOAD that YOFTD (P < 0.00001), but no difference in the frequency of epileptiform activity (P = 0.32), with 38.8% of YOAD and 28.6% of YOFTD patients having epileptiform activity. Slow wave changes were more generalized in YOAD (P = 0.001). Slow wave changes and epileptiform activity were not sensitive to the diagnosis of YOD, but highly specific (97–99%). The absence of slow wave changes and epileptiform activity had a 100% negative predictive value and likelihood radio 0.14 and 0.62 respectively, meaning that those without slow wave changes or epileptiform activity had low probability of having YOD. No relationship was established between EEG findings and the patient’s presenting problem. Eleven patients with YOAD developed seizures during the study, and only one with YOFTD.

Conclusions

The EEG is highly specific for the diagnosis of YOD with the absence of slow wave changes and epileptiform phenomena making the diagnosis unlikely, with 100% negative predictive value and with low probability for the dementia diagnosis.
Literature
1.
go back to reference Cunningham EL, McGuinness B, Herron B, Passmore AP. Dementia. Ulster Med J. 2015;84:79–87. Cunningham EL, McGuinness B, Herron B, Passmore AP. Dementia. Ulster Med J. 2015;84:79–87.
7.
go back to reference NHS Health Advisory Service. Heading for better care commissioning and providing mental health services for people with Huntington’s disease acquired brain injury and early onset dementia; mental health services. London: HMSO; 1997. NHS Health Advisory Service. Heading for better care commissioning and providing mental health services for people with Huntington’s disease acquired brain injury and early onset dementia; mental health services. London: HMSO; 1997.
9.
go back to reference Sutton AL. Alzheimer disease sourcebook. 5th ed. Detroit: Peter E. Ruffner; 2011. Sutton AL. Alzheimer disease sourcebook. 5th ed. Detroit: Peter E. Ruffner; 2011.
15.
go back to reference Edwards-Lee T, Cook I, Fairbanks L, Leuchter A, Cummings J. Quantitative electroencephalographic correlates of psychosis in Alzheimer disease. Neuropsychiatry Neuropsychol Behav Neurol. 2000;13:163–70.PubMed Edwards-Lee T, Cook I, Fairbanks L, Leuchter A, Cummings J. Quantitative electroencephalographic correlates of psychosis in Alzheimer disease. Neuropsychiatry Neuropsychol Behav Neurol. 2000;13:163–70.PubMed
23.
go back to reference Terranova R, Luca S, Marletta F, Marletta C. Spectral analysis of EEG signals in Alzheimer’s disease. Minerva Med. 1999;90:413–20.PubMed Terranova R, Luca S, Marletta F, Marletta C. Spectral analysis of EEG signals in Alzheimer’s disease. Minerva Med. 1999;90:413–20.PubMed
34.
go back to reference American Psychiatric Association. Diagnostic and statistical Manual of Mental Disorders. 5th ed. San Francisco: DSM-5); 2013.CrossRef American Psychiatric Association. Diagnostic and statistical Manual of Mental Disorders. 5th ed. San Francisco: DSM-5); 2013.CrossRef
35.
go back to reference Lawton MP, Brody EM. Assessment of older people: self-maintaining and instrumental activities of daily living. Gerontologist. 1969;9:179–86.CrossRefPubMed Lawton MP, Brody EM. Assessment of older people: self-maintaining and instrumental activities of daily living. Gerontologist. 1969;9:179–86.CrossRefPubMed
47.
go back to reference Blume WT, Kaibara M. Atlas of adult electroencephalography. New York: Raven Press Ltd; 1995. Blume WT, Kaibara M. Atlas of adult electroencephalography. New York: Raven Press Ltd; 1995.
48.
go back to reference NCBI Bookshelf. StatPearls. StatPearls. Publishing LLC, Treasure Island FL; 2022. NCBI Bookshelf. StatPearls. StatPearls. Publishing LLC, Treasure Island FL; 2022.
50.
go back to reference Panegyres PK. The clinical spectrum of young onset dementia points to its stochastic origins. J Alzheimer’s Dis Reps. 2021;5:663–79.CrossRef Panegyres PK. The clinical spectrum of young onset dementia points to its stochastic origins. J Alzheimer’s Dis Reps. 2021;5:663–79.CrossRef
52.
go back to reference Rae-Grant A, Blume W, Lau C, Hachinski VC, Fisman M, Merskey H. The electroencephalogram in Alzheimer-type dementia: a sequential study correlating the electroencephalogram with psychometric and quantitative pathologic data. Archives of Neurol. 1987;44:50–4.CrossRef Rae-Grant A, Blume W, Lau C, Hachinski VC, Fisman M, Merskey H. The electroencephalogram in Alzheimer-type dementia: a sequential study correlating the electroencephalogram with psychometric and quantitative pathologic data. Archives of Neurol. 1987;44:50–4.CrossRef
58.
go back to reference Zheng P, Shultz S, Hovens C, O’Brien TJ. Animal models of acquired epilepsy and tauopathies. In Pitkanen A, Buckmaster PS, Galanopoulos AS, Moshe SL (eds) Models of Seizures and Epilepsy. Academic Press, 2017, pp. 1031–41. Zheng P, Shultz S, Hovens C, O’Brien TJ. Animal models of acquired epilepsy and tauopathies. In Pitkanen A, Buckmaster PS, Galanopoulos AS, Moshe SL (eds) Models of Seizures and Epilepsy. Academic Press, 2017, pp. 1031–41.
66.
go back to reference Hof P, Giannakopoulos P, Bouras C. The neuropathological changes associated with normal brain aging. Histol Histopathol. 1996;11:1075–88.PubMed Hof P, Giannakopoulos P, Bouras C. The neuropathological changes associated with normal brain aging. Histol Histopathol. 1996;11:1075–88.PubMed
Metadata
Title
Electroencephalography in young onset dementia
Authors
Casey W Brown
Huei-Yang Chen
Peter K Panegyres
Publication date
01-12-2023
Publisher
BioMed Central
Published in
BMC Neurology / Issue 1/2023
Electronic ISSN: 1471-2377
DOI
https://doi.org/10.1186/s12883-023-03248-w

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