Dr. Keppler studies how certain neurons in the brain affect responses to perceived threats and social situations, primarily through experiments conducted on mice. He looks into how repeated exposure to fake threats can reduce fear responses, which is relevant for understanding anxiety disorders in humans. Additionally, his research examines how brain pathways influence social behaviors, providing insight into disorders that affect social interaction. He also investigates the impacts of juvenile stress on impulsivity and substance use, particularly focusing on how early stress may predispose individuals, especially women, to higher risks of addiction later in life.
Key findings
Mice showed a decrease in freezing responses from 90% to around 50% after repeated exposure to a fake threat, indicating a change in threat processing.
The specific brain pathway involved in social investigation helped mice determine their responses to new social situations, linking memory and emotion.
Female rats exposed to juvenile stress displayed significantly higher impulsivity when using cocaine, highlighting the long-term effects of childhood stress on behavior.
Frequently asked questions
Does Dr. Keppler study anxiety disorders?
Yes, Dr. Keppler's research includes understanding how the brain processes threats, which is important for anxiety disorders.
What types of behaviors has Dr. Keppler researched?
He has studied social behavior and how stress during childhood can impact behavior related to substance use.
Is Dr. Keppler's work relevant to mental health issues?
Absolutely, his findings on threat processing and childhood stress have direct implications for mental health and addiction.
What species does Dr. Keppler use for his research?
Much of his research is conducted using mice and rats to explore these behavioral and neurological concepts.
Publications in plain English
Interpeduncular GABAergic neuron function controls threat processing and innate defensive adaptive learning.
2025
Molecular psychiatry
Williams EW, Snively L, O'Meara BR, Jacobs HL, Kolb M +6 more
Plain English This study looked at how certain brain cells in mice help manage responses to threats, especially when there is no real danger. Researchers found that when exposed repeatedly to a fake threat (a visual stimulus), the mice began to show less fear and more curiosity, with freezing responses decreasing from 90% to around 50% after multiple exposures. Understanding how these brain functions work is important because issues with threat processing can lead to anxiety disorders in humans.
Who this helps: This helps patients with anxiety disorders and their doctors.
Plain English Researchers looked at how a specific brain pathway affects how mice respond to new social situations. They found that this pathway connects parts of the brain involved in memory and emotion, helping mice decide how to react to unfamiliar individuals. Understanding this pathway is important because it can offer insights into social behaviors which may be relevant for various brain disorders in humans.
Who this helps: This helps researchers and doctors studying social behavior and mental health issues.
N-2 Repetition Costs in Task Switching: Task Inhibition or Interference Between Task Episodes?
2022
Journal of cognition
Schuch S, Keppler E
Plain English This study looked at how people perform on tasks when they switch between them, specifically focusing on a phenomenon called "N-2 repetition costs," which happens when a task is repeated after two different tasks. Researchers found that both interference from past tasks and an inhibition effect contributed to performance issues, with a clearer impact from interference, but the inhibition effect still played a role. Their findings help us understand how task switching works and may improve strategies for better task management.
Who this helps: This helps researchers and psychologists working on cognitive function and task management.
Juvenile stress increases cocaine-induced impulsivity in female rats.
2021
Behavioural brain research
Paine TA, Brainard S, Keppler E, Poyle R, Sai-Hardebeck E +2 more
Plain English This study looked at how stress during childhood affects behavior related to drug use later in life, specifically in female rats. The researchers found that female rats exposed to stress as juveniles showed higher impulsivity when using cocaine compared to those that weren't stressed. This matters because understanding these effects can help explain why women might be more likely to develop substance abuse issues after experiencing childhood stress.
Who this helps: This helps researchers, doctors, and those working with patients who have a history of childhood trauma.
Observations of energetic particles with EPAC on Ulysses in polar latitudes of the heliosphere.
1995
Science (New York, N.Y.)
Keppler E, Fränz M, Korth A, Reuss MK, Blake JB +3 more
Plain English This study examined how energetic particles are detected in the polar regions of our solar system using a special instrument on the Ulysses spacecraft. Researchers found that these particles were linked to shock waves from solar events and were detected up to 65 degrees latitude, but not beyond that point. This matters because understanding how particles behave in these regions helps scientists learn more about solar activity and its effects on space weather.
Who this helps: This helps scientists studying space weather and its impact on satellites and communication systems.
An Overview of Energetic Particle Measurements in the Jovian Magnetosphere with the EPAC Sensor on Ulysses.
1992
Science (New York, N.Y.)
Keppler E, Blake JB, Fränz M, Korth A, Krupp N +3 more
Plain English This study looked at how energetic particles behave in the magnetic field around Jupiter after a specific space weather event. Researchers found that when the Ulysses spacecraft passed through various areas near Jupiter, the number of energetic particles was unexpectedly low, particularly in certain regions. This information is important because it helps improve our understanding of Jupiter's magnetic environment and how it interacts with space weather.
Who this helps: This helps scientists studying Jupiter and space weather impacts.