Listening to Heavy Metal Music, such as Iron Maiden and Metallica, in utero has developmental implications, according to a recent longitudinal study published in the Journal of Infant Development.
Foetuses exposed to Heavy Metal music for 25 minutes a day in the second and third trimesters of pregnancy have been found to be have 18% higher levels of pre-natal testosterone, levels that do not appear to decrease until after the 5th year of development.
Dr. Hetfield, lead author of the study, claims increased testosterone can have developmental implications. "Primarily we found increased levels of trait aggression", Hetfield said. "What we didn't expect was that at these levels of Heavy Metal exposure, male infants, in particular, were born with a significant degree more hair on their scalp".
In a series of 12 follow-up studies, conducted every 6 months after birth, researchers found that infants grew slightly faster and larger than controls, continued to grow unusual lengths of head-hair, and displayed higher levels of trait aggression than controls, or levels of parental testosterone would have predicted.
"We're calling this the Metallica Effect", Dr. Hetfield said, "it is completely counter-intuitive that loud rock music should have this kind of influence over the development of the embryo". Dr. Hetfield speculates that the volume of the music, as well as the dominant percussive rhythms and unique vocal 'screaming' triggers evolutionary responses for the foetus to grow larger, stronger and more 'primal' than control. "I guess we're mimicking conditions similar to early hominid warfare. You can see the advantage in growing faster and stronger when such cues are present".
Developmental Science: http://www.HappyApril1st.com
This press release was posted to serve as a topic for discussion. Please comment below. We try our best to only post press releases that are associated with peer reviewed scientific literature. Critical discussions of the research are appreciated. If you need help finding a link to the original article, please contact us on twitter or via e-mail.
Did anyone else notice that this was written by Dr. Hetfield (James Hetfield from Metallica), I'm not sure if that's just a coincidence or not. But more to the point I'm not surprised that listening to heavy metal increases testosterone because some of my favourites lift my mood if I'm feeling a bit down.
I think you should also note the date of publication and the link to the source material ;)
i like turtles
this is hilarious
There's a new contender in the century-old quest for perfect, guiltless sweetness: allulose. It's sugar — but in a form that our bodies don't convert into calories. Perfect? Not quite.
Researchers say findings may have important public health implications as vitamin supplements are relatively safe and cost-effective
Sarcoptic mange can leave southern hairy-nosed and bare-nosed wombats blind and deaf before eventually killing them
Annual vaccinations could be a thing of the past as scientists have successfully tested vaccines on animals infected with different strains of influenza
Remember winter, when everything was cold and grey? Right now, when all around is lush and green, the contrast couldn’t be greater. But is everything really as it seems? New research shows that we see things differently in winter compared with summer.
We now know how to turn fat cells into ones that burn calories as heat rather than store them – raising the prospect of a gene therapy for obesity
A growing body of research suggests that doctors' racial biases and other prejudices continue to affect the care patients received. Medical educators say self-awareness is an important first step.
A new study renews questions about how aggressively doctors should treat a very early form of breast cancer or pre-cancer.
Addyi gains US marketing licence after third attempt, but questions remain about its effectiveness, potential side-effects and the true need for the drug
Increasingly taken by healthy people to improve focus before exams, after a comprehensive review researchers say modafinil is safe in the short-term