Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Knee injuries in women linked to motion, nervous system differences

18.04.2012
Women are more prone to knee injuries than men, and the findings of a new study suggest this may involve more than just differences in muscular and skeletal structure – it shows that males and females also differ in the way they transmit the nerve impulses that control muscle force.
Scientists at Oregon State University found that men control nerve impulses similar to individuals trained for explosive muscle usage – like those of a sprinter – while the nerve impulses of women are more similar to those of an endurance-trained athlete, like a distance runner.

In particular, the research may help to explain why women tend to suffer ruptures more often than men in the anterior cruciate ligament of their knees during non-contact activities. These ACL injuries are fairly common, can be debilitating, and even when repaired can lead to osteoarthritis later in life.

More study of these differences in nervous system processing may lead to improved types of training that individuals could use to help address this issue, scientists said.

“It’s clear that women move differently than men, but it’s not as obvious why that is,” said Sam Johnson, a clinical assistant professor in the OSU School of Biological and Population Health Sciences.

“There are some muscular and skeletal differences between men and women, but that doesn’t explain differences in injury rates as much as you might think,” Johnson said. “No one has really studied the role of the nervous system the way we have in explaining these differences, specifically the way sensory information is processed and integrated with motor function in the spinal cord.”

In this study, just published in the European Journal of Applied Physiology, the scientists found that most aspects of spinal motor control and rapid activation of muscles were similar in 17 men and 17 women that were examined – with one exception. Men had a higher level of “recurrent inhibition,” which is a process in the spinal cord that helps select the appropriate muscle response.

Even a process as simple as walking is surprisingly complicated, as people process large amounts of information and use varying forces to move around obstacles, change direction or simply climb up a step. And when you slip on an icy patch, the need for extremely rapid and accurate muscle response might be all that stands between you and a broken hip.

For some reason, women tend to have knee motions that make them more susceptible to injury. Among other things, when landing from a jump their knees tend to collapse inward more than that of most men. They suffer significantly more ACL injuries during physical activity.

“We’re finding differences in nervous system processing that we believe are related to this,” Johnson said. “The causes for those differences are unclear, but it may be due either to a biological difference, such as hormones, or a cultural difference such as different exercise and training patterns.”

This research was supported by the National Athletic Trainers’ Association Research and Education Foundation. Researchers at Marquette University collaborated on the work.

While researchers continue to study what might help address this, Johnson said it’s already possible for women to be more aware of these common differences and do exercises that should reduce problems.

Many ACL injury prevention programs incorporate strength, balance, flexibility, and jump training. However, based on these and other findings, women – especially athletes – should consider training with motions more similar to those of their sport, such as squatting, lunging, jumping or cutting side-to-side.

Use of heavy weights may not really be necessary, Johnson said, so much as mimicking the motions that often cause this injury.

The study this story is based on is available online: http://bit.ly/Ius3gv
About the OSU College of Public Health and Human Sciences: The College creates connections in teaching, research and community outreach while advancing knowledge, policies and practices that improve population health in communities across Oregon and beyond.

Sam Johnson | EurekAlert!
Further information:
http://www.oregonstate.edu

Further reports about: ACL Johnson OSU Oregon Shattered Knee health services nerve impulses nervous system spinal cord

More articles from Health and Medicine:

nachricht Study suggests possible new target for treating and preventing Alzheimer's
02.12.2016 | Oregon Health & Science University

nachricht The first analysis of Ewing's sarcoma methyloma opens doors to new treatments
01.12.2016 | IDIBELL-Bellvitge Biomedical Research Institute

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

Im Focus: Molecules change shape when wet

Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water

In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...

Im Focus: Fraunhofer ISE Develops Highly Compact, High Frequency DC/DC Converter for Aviation

The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.

Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

UTSA study describes new minimally invasive device to treat cancer and other illnesses

02.12.2016 | Medical Engineering

Plasma-zapping process could yield trans fat-free soybean oil product

02.12.2016 | Agricultural and Forestry Science

What do Netflix, Google and planetary systems have in common?

02.12.2016 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>