For a Cognitive Model of Subjective Memory Awareness

Area of Science:

• Neuropsychology
• Cognitive Science
• Neurology

Background:

• Subjective memory decline (SMD) presents a clinical challenge in identifying individuals who will develop memory deficits.
• Awareness of cognitive impairment, termed anosognosia, is crucial in clinical neuropsychology.
• Existing models struggle to fully explain the spectrum of awareness in cognitive decline.

Purpose of the Study:

• To propose a cognitive model integrating subjective memory decline (SMD) and anosognosia.
• To introduce "cognitive dysgnosia" as a state of distorted awareness where normal performance is perceived as impaired.
• To emphasize the importance of assessing awareness alongside memory performance in neuropsychological evaluations.

Main Methods:

• Conceptualization of a cognitive model for awareness of memory performance.
• Defining cognitive dysgnosia as a disorder of consciousness within the SMD spectrum.
• Advocating for integrated neuropsychological assessment of memory and awareness.

Main Results:

• SMD and anosognosia are presented as opposite ends of a continuum of distorted awareness.
• Cognitive dysgnosia bridges normal awareness and anosognosia, characterizing awareness of normal performance as impaired.
• The model highlights the necessity of evaluating awareness to differentiate cognitive impairment from subjective complaints.

Conclusions:

• A unified model can explain varying levels of awareness in memory decline.
• Assessing awareness is critical for accurate diagnosis and differentiating neurodegenerative conditions from non-pathological memory complaints.
• Development of sensitive tools is needed to distinguish SMD with underlying pathology from benign memory concerns.