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Updated: May 24, 2026
11:01
Examining the Characteristics of Episodic Memory using Event-related Potentials in Patients with Alzheimer's Disease
Published on: August 30, 2011
Episodic memory in frontotemporal dementia: a critical review
Michael Hornberger1, Olivier Piguet
1Neuroscience Research Australia, Sydney, NSW 2031, Australia.
Brain : a Journal of Neurology
|February 28, 2012
Summary
Episodic memory may be impaired in frontotemporal dementia (FTD), challenging the view that it is preserved. New evidence suggests memory deficits are present and require sensitive diagnostic tools for accurate FTD diagnosis.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Neurology
Background:
- Frontotemporal dementia (FTD) is a neurodegenerative disease affecting behavior, language, and executive functions.
- Historically, episodic memory was considered relatively preserved in FTD, distinguishing it from Alzheimer's disease.
- This view supported FTD diagnostic criteria excluding amnesia.
Observation:
- Recent studies challenge the notion of intact episodic memory in FTD, particularly in the behavioral variant (bvFTD).
- Semantic dementia (SD), another FTD subtype, shows preserved aspects of episodic memory, like visual recognition and recent autobiographical recall.
- Neuroimaging and neuropathology reveal medial temporal lobe involvement in FTD, crucial for episodic memory.
Findings:
- Standard memory tests may not adequately capture episodic memory deficits in FTD due to their complex nature.
- Evidence suggests episodic memory impairment is more prevalent and significant in FTD than previously recognized.
- Specific components of episodic memory, such as visual and autobiographical recall, show variable preservation in SD.
Implications:
- Re-evaluation of memory disturbance's role in FTD clinical diagnosis is warranted.
- Development of more sensitive neuropsychological assessment tools for FTD is crucial.
- Distinguishing FTD from other dementias like Alzheimer's may require reassessing memory profiles.
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