Study hypothesizes that adolescent steroid exposure may permanently alter the production of the feel good receptor
"With more than one in ten boys admitting to using steroids, muscle- and strength-enhancing drug use among teenagers has caused considerable concern among parents and researchers over the past decade, but until now, the longer-term physiological and neurological effects of its use on the developing brain have not been fully examined. Now, new research from Northeastern University, published in the latest issue of the journal Pharmacology, Biochemistry and Behavior, documents the link between adolescent anabolic steroid use and aggression and partly associates the increases in aggression with deficits in the brain"s serotonin system. The study will examine longer-term deficiencies of serotonin levels in the brain as a result of damage from steroid use, suggesting that a tendency toward aggression and impulsiveness may actually linger long after both the steroid use and the muscles and strength developed have waned.
With funding from the National Institute of Health, Northeastern University psychology professor Richard Melloni and graduate student Jill Grimes examined the phenomenon of long-term steroid use through a series of experiments on groups of adolescent male Syrian hamsters. During adolescence, this particular breed of hamster displays a natural form of territorial aggression, has similar neurological circuitry to human beings and similar aggression and dominance patterns during its adolescent years, making it a natural model for neurological and behavioral experiments.
Christine Phelan | EurekAlert!
Virtual "moonwalk" for science reveals distortions in spatial memory
18.11.2019 | Max-Planck-Institut für Kognitions- und Neurowissenschaften
Autonomous Agriculture in 2045?
15.11.2019 | Fraunhofer-Institut für Experimentelles Software Engineering IESE
Nanooptical traps are a promising building block for quantum technologies. Austrian and German scientists have now removed an important obstacle to their practical use. They were able to show that a special form of mechanical vibration heats trapped particles in a very short time and knocks them out of the trap.
By controlling individual atoms, quantum properties can be investigated and made usable for technological applications. For about ten years, physicists have...
An international team of scientists, including three researchers from New Jersey Institute of Technology (NJIT), has shed new light on one of the central mysteries of solar physics: how energy from the Sun is transferred to the star's upper atmosphere, heating it to 1 million degrees Fahrenheit and higher in some regions, temperatures that are vastly hotter than the Sun's surface.
With new images from NJIT's Big Bear Solar Observatory (BBSO), the researchers have revealed in groundbreaking, granular detail what appears to be a likely...
The Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM in Dresden has succeeded in using Selective Electron Beam Melting (SEBM) to...
Carbon nanotubes (CNTs) are valuable for a wide variety of applications. Made of graphene sheets rolled into tubes 10,000 times smaller than a human hair, CNTs have an exceptional strength-to-mass ratio and excellent thermal and electrical properties. These features make them ideal for a range of applications, including supercapacitors, interconnects, adhesives, particle trapping and structural color.
New research reveals even more potential for CNTs: as a coating, they can both repel and hold water in place, a useful property for applications like printing,...
If you've ever tried to put several really strong, small cube magnets right next to each other on a magnetic board, you'll know that you just can't do it. What happens is that the magnets always arrange themselves in a column sticking out vertically from the magnetic board. Moreover, it's almost impossible to join several rows of these magnets together to form a flat surface. That's because magnets are dipolar. Equal poles repel each other, with the north pole of one magnet always attaching itself to the south pole of another and vice versa. This explains why they form a column with all the magnets aligned the same way.
Now, scientists at ETH Zurich have managed to create magnetic building blocks in the shape of cubes that - for the first time ever - can be joined together to...
15.11.2019 | Event News
15.11.2019 | Event News
05.11.2019 | Event News
19.11.2019 | Physics and Astronomy
19.11.2019 | Social Sciences
19.11.2019 | Life Sciences