Brain imaging research may be grappling with a fresh challenge. Scanning the brain of a single person can reveal the areas they use to complete a task, although the exact pattern differs from person to person. But averaging the results across many people—as scientists often do—fails to capture some important nuances, a new functional MRI (fMRI) study suggests.

The brain tackles decision-making tasks in particular through several different categories of brain activity, rather than a single one, according to the study, published in Nature Communications in February by a team that includes School of Psychology researchers. Across three decision-making tasks, participants’ brains differentially activated and suppressed various regions and networks in ways that could be grouped into distinct categories, or subtypes, highlighting the variability of neural signatures during behavior.

The Transmitter

Biofilms have emergent properties: traits that appear only when a system of individual items interacts. It was this emergence that attracted School of Physics Associate Professor Peter Yunker to the microbial structures. Trained in soft matter physics — the study of materials that can be structurally altered — he is interested in understanding how the interactions between individual bacteria result in the higher-order structure of a biofilm

Recently, in his lab at the Georgia Institute of Technology, Yunker and his team created detailed topographical maps of the three-dimensional surface of a growing biofilm. These measurements allowed them to study how a biofilm’s shape emerges from millions of infinitesimal interactions among component bacteria and their environment. In 2024 in Nature Physics, they described the biophysical laws that control the complex aggregation of bacterial cells.

The work is important, Yunker said, not only because it can help explain the staggering diversity of one of the planet’s most common life forms, but also because it may evoke life’s first, hesitant steps toward multicellularity.

Quanta Magazine

Four million Americans suffer from glaucoma, an incurable eye disease that slowly degrades peripheral vision and eventually leads to blindness. A new treatment could potentially stop this degradation and possibly save people’s vision before it’s too late.

Raquel Lieberman, a professor in the School of Chemistry and Biochemistry and the Parker H. Petit Institute for Bioengineering and Bioscience, and her lab team have discovered two new antibodies with promise to treat glaucoma. The antibodies can break down the protein myocilin, which, when it malfunctions, can cause glaucoma.

Lieberman’s group recently published this research in the Proceedings of the National Academy of Sciences: Nexus.

Futurity

A shallow magnitude earthquake shook parts of middle Georgia earlier Tuesday evening, less than half a day after tremors were felt in northwest Georgia in Chattooga County.

11Alive meteorologist Melissa Nord (EAS 2013) spoke with a Georgia Tech seismologist, who explained Northwest Georgia is the state's most active seismic region. It is located within the Eastern Tennessee Seismic Zone, which experiences frequent, small earthquakes. 

Zhigang Peng, professor of geophysics in the School of Earth and Atmospheric Sciences, recently co-authored a research study on the frequency of earthquakes in this Eastern Tennessee Seismic Zone.

"We connected all of the data that has been recorded in that region over the past 15 years or so. And then we carefully relocated, trying to determine exactly where they're located. And after we did that, we found out that many of them occur in small kind of ligament, which is probably an indication that there are some small faults," Peng said. 

It's possible that Tuesday's earthquake in northwest Georgia was one of those small ligaments or faults, but Dr. Peng said he'd need to investigate further. 

11 Alive

The Board of Regents of the University System of Georgia named Robert Scott president of Albany State University, effective May 1, 2025. Scott, who holds a Ph.D. in cellular and molecular biology from the Georgia Institute of Technology, will return to higher education after almost two decades working in the private sector. 

University System of Georgia, External Affairs