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Related Concept Videos

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Personal identity is the deeply felt sense of self that individuals cultivate over time, intricately woven from intrinsic qualities they consider essential to their existence—qualities such as morality, intelligence, and friendliness. These attributes serve as vital internal benchmarks, guiding individuals in evaluating whether their actions resonate with their true selves.When personal identity takes center stage in one's life, individuals often emphasize their distinctiveness, highlighting...
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Intellectual disability (ID) is a neurodevelopmental condition characterized by deficits in intellectual and adaptive functioning that manifest during the developmental period. This condition encompasses challenges in reasoning, memory, problem-solving, and learning, accompanied by impairments in everyday life skills, such as communication, self-care, and social interactions. Intellectual disability affects approximately 1% of the population in the United States, impacting an estimated 5...
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Related Experiment Video

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Behavioral Tasks for Examining Identity Recognition In Mice
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Mild cognitive impairment: same identity for different entities.

Laura Serra1, Giovanni Giulietti, Mara Cercignani

  • 1Neuroimaging Laboratory, Santa Lucia Foundation, IRCCS, Rome, Italy.

Journal of Alzheimer'S Disease : JAD
|October 31, 2012
PubMed
Summary
This summary is machine-generated.

Different patterns of grey matter loss in mild cognitive impairment (MCI) predict distinct cognitive deficits and clinical outcomes. Amnestic MCI shows medial temporal lobe loss linked to memory, while non-amnestic MCI shows orbito-frontal loss linked to executive function, predicting different dementia types.

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Area of Science:

  • Neuroscience
  • Neurology
  • Radiology

Background:

  • Mild cognitive impairment (MCI) is a heterogeneous condition.
  • Different MCI subtypes exhibit distinct clinical and cognitive profiles.
  • The underlying neurodegenerative patterns contributing to MCI heterogeneity require clarification.

Purpose of the Study:

  • To investigate if distinct patterns of grey matter (GM) loss correlate with specific neuropsychological profiles in amnestic (a-MCI) and non-amnestic (na-MCI) subtypes.
  • To determine if these GM loss patterns can predict the clinical evolution of MCI patients.

Main Methods:

  • Voxel-based morphometry (VBM) analysis of 3T MRI scans from 55 MCI patients and 28 healthy controls.
  • Comprehensive neuropsychological assessments to classify MCI subtypes and evaluate cognitive performance.
  • One-year clinical follow-up to track patient progression and diagnostic conversion.

Main Results:

  • a-MCI patients exhibited significant GM reductions in medial temporal lobes, correlating with verbal long-term memory deficits (hippocampus).
  • na-MCI patients showed GM reductions in orbito-frontal cortex and basal ganglia, associated with executive function impairments.
  • One-year follow-up revealed a-MCI converting to Alzheimer's disease (AD) and na-MCI converting to non-AD dementias.

Conclusions:

  • MCI represents diverse neurodegenerative conditions, not a single entity.
  • Specific regional GM loss patterns underlie distinct neuropsychological features in a-MCI and na-MCI.
  • These neuroanatomical patterns serve as predictive biomarkers for MCI patient clinical trajectories.