The neural mechanisms underlying the link between neuroticism and increased dementia risk are unclear

The gap

Evidence profile

Sourced from the stated research gap and future-work section and stated challenges of the source papers, classified as general, drawn from work published between 1977 and 2026, spanning 6 journals. Those papers have been cited 150 times in total.

Supporting evidence — 8 representative gaps

• Multimodal EEG and explainable machine learning characterize neuroticism-related neurodynamic heterogeneity in mild cognitive impairment during visuospatial working memory (2026) · Frontiers in Aging Neuroscience · doi

  The study identifies a gap in the current understanding of the neural mechanisms underlying cognitive decline in individuals with mild cognitive impairment and elevated neuroticism. The study highlights the need for further research on the role of neuroticism in cognitive decline. The study suggests that personalized interventions for cognitive decline may be developed based on the study's findings.

  generalstated research gapevidence 5/5
  Keywords: study identifies gap current understanding neural mechanisms underlying
• Association between neuroticism and brain-wide structural outcomes: Mediation by vascular and mental conditions (2025) · Psychological Medicine · doi

  The neural mechanisms underlying the link between neuroticism and increased dementia risk are unclear. Previous studies have not examined the associations between neuroticism and specific brain structures in detail. There is a need to identify the health conditions that mediate the associations between neuroticism and brain structure.

  generalstated research gapevidence 5/5
  Keywords: neural mechanisms underlying link between neuroticism increased dementia
• Different structural brain patterns and their association with executive function and general cognitive ability in cognitively normal elderly adults (2026) · Frontiers in Aging Neuroscience · doi

  explore how cognitive reserve influences the relationship between brain structure and cognitive performance in aging populations - examine the role of structural changes in both healthy aging and cognitive decline associated with conditions such as mild cognitive impairment or neurodegenerative diseases - investigate compensatory mechanisms and non-linear trajectories to gain a more comprehensive understanding of the relationship between brain structure and cognitive function during aging

  generalfuture-work sectionevidence 5/5
  Keywords: explore cognitive reserve influences relationship between brain structure
• Stage-dependent effects of cognitive reserve on memory and brain structural integrity across the spectrum from healthy aging to Alzheimer’s disease (2026) · Frontiers in Human Neuroscience · doi

  The study faces challenges in identifying the stage-dependent effects of cognitive reserve on the relationship between memory performance and brain structural network integrity. The study needs to consider the concepts of Brain Reserve and Cognitive Reserve. The study requires the use of advanced neuroimaging techniques, such as source-based morphometry.

  generalstated challengesevidence 5/5
  Keywords: study faces challenges identifying stage-dependent effects cognitive reserve
• Impaired Monosynaptic Potentiation in in Vitro Hippocampal Slices From Aged, Memory-deficient Rats (1977) · Journal of Gerontology · cited 146× · doi

  Further studies are needed to investigate the underlying mechanisms of the observed deficits. Studies should examine the relationship between physiological deficits in hippocampal synaptic plasticity and deficits in behavioral plasticity in more detail. Studies should investigate the neural mechanisms underlying age-related cognitive decline.

  generalfuture-work sectionevidence 4/5
  Keywords: further studies needed investigate underlying mechanisms observed deficits
• Global scale-free brain activity as a potential neural signature of visual information processing in aging (2026) · Frontiers in Aging Neuroscience · doi

  Further studies are needed to explore the relationship between E/I ratio and β in different frequency ranges. Investigating the neural mechanisms of aging and age-related cognitive decline in larger and more diverse populations is necessary. Examining the effects of interventions on spectral slope and cognitive performance in older adults could provide valuable insights.

  generalfuture-work sectionevidence 4/5
  Keywords: further studies needed explore relationship between ratio different
• Network outcome analysis of cognitive function and daily functioning and risk of dementia among adults aged 50 years and older: an 8-year prospective study (2026) · European Archives of Psychiatry and Clinical Neuroscience · doi

  Further studies are needed to explore the relationships between cognitive function, daily functioning, and incident dementia. Research on the potential contributing factors to the risk of dementia, such as lower educational attainment, is needed. Studies on the effects of poor daily functioning and reduced cognitive reserve on the risk of dementia are required.

  generalfuture-work sectionevidence 4/5
  Keywords: further studies needed explore relationships between cognitive function
• Lifestyle-associated blood metabolic pathways and functional performance in cognitive aging (2026) · Scientific Reports · cited 4× · doi

  Further studies are needed to confirm the associations between lifestyle-associated metabolic pathway patterns and functional performance, - Research on the mechanisms underlying the relationships between lifestyle, metabolic pathways, and cognitive aging is necessary, - Investigation of the potential for lifestyle interventions to modify metabolic pathways and improve functional outcomes in cognitive aging

  generalfuture-work sectionevidence 4/5
  Keywords: further studies needed confirm associations between lifestyle-associated metabolic

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