Related Experiment Video
Updated: Feb 7, 2026
06:59
Characterization of Metabolic Status in Nonhuman Primates with the Intravenous Glucose Tolerance Test
Published on: November 13, 2016
11.4K
An Explainable Framework for the Relationship between Dementia and Metabolism Patterns.
C Vázquez-García1, F J Martínez-Murcia1, F Segovia Román1
1Department of Signal Processing and Biomedical Applications, University of Granada, Granada 18071, Spain.
Arxiv
|February 6, 2026
Summary
This study introduces a semi-supervised Variational Autoencoder (VAE) framework to analyze neuroimaging data for neurodegenerative diseases. The model aligns latent spaces with cognitive scores, revealing key brain region metabolism changes in Alzheimer's disease progression.
Area of Science:
- Neuroscience
- Medical Imaging
- Machine Learning
Background:
- High-dimensional neuroimaging data poses challenges for studying neurodegenerative diseases due to complex relationships.
- Variational Autoencoders (VAEs) offer a method to reduce data dimensionality and extract relevant features.
Purpose of the Study:
- To develop a semi-supervised VAE framework for neuroimaging analysis in neurodegenerative diseases.
- To align latent representations with clinical or biomarker measures of disease progression, such as cognitive scores.
Main Methods:
- Implemented a semi-supervised VAE with a flexible similarity regularization term.
- Utilized PET scans from the Alzheimer's Disease Neuroimaging Initiative (ADNI) dataset.
- Guided the first latent dimension to correlate with a cognitive score.
Main Results:
- Generated average reconstructions reflecting cognitive impairment levels.
- Identified reduced metabolism in the hippocampus and key Resting State Networks (Default Mode, Central Executive).
- Latent variables captured confounds like inter-subject variability and site effects.
Conclusions:
- The VAE framework effectively extracts Alzheimer's disease-related patterns aligned with biomarkers.
- The approach provides an interpretable and adaptable tool for studying neurodegenerative disease progression.
- Demonstrated utility in linking neuroimaging features to cognitive decline.
Related Concept Videos
01:30Dementia
580
Dementia is a collective term for cognitive disorders primarily affecting memory, thinking, and reasoning. It is not a specific disease but a syndrome, with Alzheimer's disease being the most common cause, accounting for approximately 60-80% of cases. Other types include vascular dementia, Lewy body dementia, and frontotemporal dementia. Dementia affects millions worldwide, particularly older adults, though it is not a normal part of aging.
The progression of dementia is generally gradual....
The progression of dementia is generally gradual....
580
02:12Relationship Formation
46.2K
What do you think is the single most influential factor in determining with whom you become friends and whom you form romantic relationships? You might be surprised to learn that the answer is simple: the people with whom you have the most contact. This most important factor is proximity. You are more likely to be friends with people you have regular contact with. For example, there are decades of research that shows that you are more likely to become friends with people who live in your dorm,...
46.2K
00:52What is Metabolism?
132.0K
Overview
132.0K
01:28Ending Relationships
194
The dissolution of intimate relationships presents complex emotional and psychological challenges, particularly when emotional bonds are strong, the relationship is long-standing, and perceived alternatives are limited. This distress often intensifies in romantic breakups, where the initiator may experience greater turmoil than the rejected partner. Contributing factors include residual attachment, guilt over causing pain, and uncertainty about how to manage the situation. The stress is further...
194
02:34Kinetic Molecular Theory and Gas Laws Explain Properties of Gas Molecules
37.5K
The test of the kinetic molecular theory (KMT) and its postulates is its ability to explain and describe the behavior of a gas. The various gas laws (Boyle’s, Charles’s, Gay-Lussac’s, Avogadro’s, and Dalton’s laws) can be derived from the assumptions of the KMT, which have led chemists to believe that the assumptions of the theory accurately represent the properties of gas molecules.
37.5K
01:02Glucose Homeostasis: Regulation of Blood Glucose
4.3K
Carbohydrates consumed through foods are converted into glucose, a crucial energy source for the body. In the prandial state, high blood glucose levels stimulate the secretion of insulin from the pancreas. Insulin inhibits hepatic glucose production and stimulates glucose uptake and metabolism by muscle and adipose tissue. The excess glucose is converted into glycogen and stored in the liver and muscles.
During fasting, when blood glucose levels are low, the pancreas secretes glucagon. it...
During fasting, when blood glucose levels are low, the pancreas secretes glucagon. it...
4.3K