A recent study led by researchers at Georgia State University has made progress in understanding how the smallest components of the brain contribute to thought, emotion, and behavior. The findings were published in Nature Communications and could impact research on cognition, aging, and mental health disorders such as depression and schizophrenia.
The team combined brain scans with genetic data and molecular imaging to create a detailed map that connects different levels of brain organization. This approach allowed them to identify links between micro-level biological features and macro-level brain systems.
Vince Calhoun, Distinguished University Professor at Georgia State and senior author of the study, explained that this work may help experts understand mental health conditions and brain disorders more clearly. He noted it could also provide insight into why cognitive abilities differ among individuals as they age.
The researchers used dynamic connectivity from brain scans—showing how regions communicate over time—alongside maps of brain cells, neurotransmitters like serotonin and dopamine, and mitochondria. By applying mediation analysis, they demonstrated that certain networks serve as bridges between biology and behavior.
Guozheng Feng, lead author and postdoctoral research associate at the TReNDS Center, described the significance: "This study is bringing us closer to answering one of the most fundamental questions in neuroscience: how microscopic cellular and molecular foundations shape the brain's networks which, in turn, give rise to complex thought, emotion and behavior."
Calhoun added: "Many mental and neurodegenerative disorders involve both molecular imbalance and network disruption. This work shows these are linked. Understanding the biological foundation of networks could help us pinpoint which systems are most vulnerable in schizophrenia, depression or Alzheimer's - and why."
Jiayu Chen, a research assistant professor involved in the project, highlighted its contribution: "This work helps answer a big question in neuroscience: How do cellular and molecular organizations underlie the architecture of functional brain networks, which influence the way we think, feel and behave? We are now one step closer to those answers."
Calhoun said that future goals include developing personalized maps linking individual biology with brain network function. Such advances could allow for customized treatments based on each patient's unique biological makeup.
The TReNDS Center is a collaboration among Georgia State University, Georgia Tech, and Emory University focused on developing tools to translate brain imaging data into biomarkers for better understanding and treating brain health conditions.
