Navigation Links
Adapting to pregnancy played key role in human evolution, study shows
Date:12/13/2007

AUSTIN, TexasThe human spine evolved differently in males and females in order to alleviate back pressure from the weight of carrying a baby, according to research spearheaded at The University of Texas at Austin.

The lumbar differences are documented for the first time in the Dec. 13 issue of Nature.

The researchers believe the adaptation first appeared at least two million years ago, in the early human ancestor Australopithecus. The male-female difference does not appear in chimpanzees, meaning the evolution to walking upright led to the adaptation.

"Natural selection favored this adaptation because it reduces extra stress on a pregnant female's spine," said University of Texas at Austin anthropologist Liza Shapiro, who conducted the research with graduate student Katherine K. Whitcome, now a post-doctoral fellow at Harvard University. "Without the adaptation, pregnancy would have placed a heavier burden on back muscles, causing considerable pain and fatigue and possibly limiting foraging capacity and the ability to escape from predators."

Harvard anthropologist Daniel Lieberman also contributed to the study, which shows the key differences between males and females appear in the lower back, or lumbar portion of the spine.

Human spines have a unique forward curve in the lumbar region, but the curve extends across more vertebrae in females. That helps offset harmful forces that might occur on the spine when pregnant women lean back or hyperextend their spines to balance the weight of the fetus, Shapiro said. The joints between the vertebrae also are larger in females and angled differently than in males to better support the extra weight.

"Any mother can attest to the awkwardness of standing and walking while balancing pregnancy weight in front of the body," Shapiro said. "Yet our research shows their spines have evolved to make pregnancy safer and less painful than it might have been if these adaptations
'/>"/>

Contact: Liza Shapiro
liza.shapiro@mail.utexas.edu
512-471-4206
University of Texas at Austin
Source:Eurekalert

Page: 1 2

Related medicine news :

1. HIV therapy in pregnancy-data support WHO recommendations
2. Treating diabetes during pregnancy can break link to childhood obesity
3. Treating Diabetes During Pregnancy Could Lead to Thinner Kids
4. 15% of Women Struggle With Pregnancy-Related Depression
5. Pregnancy may increase the risk of developing binge eating disorder
6. Pregnancy may slow -- not accelerate -- progression to AIDS
7. Study indicates pregnancy does not harm chances of survival from cancer
8. Kaiser Permanente Study Shows One in Seven Women are Depressed Before, During, or After Pregnancy
9. IVF technique enables pregnancy without multiple births, Stanford researchers find
10. Maternal Mortality Declining in Middle-income Countries; Women Still Die in Pregnancy and Childbirth in Low-income Countries
11. Pancreas May Be Key to Pregnancy-Linked Diabetes
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/30/2014)... 2014 In today’s world, a good night’s ... Snoring and sleep apnea (a medical problem where the airway ... bed partners of the rest they need to face their ... snores and 20 million people in the United States alone ... and treated; and of those treated, many cannot tolerate their ...
(Date:8/30/2014)... Seattle, WA (PRWEB) August 30, 2014 One ... of this era is the gluten-free diet. Originally meant for ... has become a catchall for people who are looking to ... gluten. However, not only is this kind of information erroneous, ... of health problems because of a drastic change in ...
(Date:8/30/2014)... Colorado (PRWEB) August 30, 2014 The new ... Cure program was created by Karen Brimeyer, who wanted to ... world. , This guide is now easy to find ... instant download. In this guide, the author of the new ... cure. , Daily Gossip writes in its review that ...
(Date:8/30/2014)... 2014 August 28th, 2014: With ... our society and the toll that takes on the ... that continuing education for physical therapists addresses this problem. ... therapists help others, Hands-On Seminars is offering discounts on ... Three learning styles are available to fit the individual ...
(Date:8/30/2014)... 30, 2014 Ms. Meriwether’s striking beauty is ... certainly has an impressive resume to boost. Nana is ... 2012. However, she’s also a two time All American ... Nana trained for the 2008 Olympics and played professional volleyball ... “This six-foot beauty from Potomac, Maryland is a two-time, All ...
Breaking Medicine News(10 mins):Health News:Snoring: Bad for Relationships, Bad for Health 2Health News:Snoring: Bad for Relationships, Bad for Health 3Health News:“What is Gluten: Three Things You Need to Know Before Adopting a Gluten-Free Diet” Reveals What Readers Need to Know About the Benefits of a Strict Gluten Diet - Vinamy 2Health News:Leaky Gut Cure Review Reveals Unique Method to Stop Chronic Symptoms 2Health News:Leader in Manual Therapy Continuing Education Makes it Easier for Physical Therapists to Improve Results on Patients 2Health News:NJ Top Dentists Announces Cover Model for the Healthy Living: Top Dentists Issue 2
... ... ... ... ...
... ... , ... , , , ... NEW YORK , March 4 ...
... , ... ... ... ...
... (CRC) is the third leading cause of cancer death ... people who need CRC screening receive it. The American ... about the importance of screening and to encourage everyone ... Recognizing that those without insurance have limited ...
... Bovis compound preparation (ICCBco) in the treatment of ... as the experimental animal model, a research group ... to observe pathological changes and pathological effect mechanism ... lung tissue of portal hypertensive rabbits with schistosomiasis. ...
... but elderly women are too, study finds , THURSDAY, March ... of shoulder dislocation, and young males have the highest risk ... , Researchers studied 8,940 shoulder dislocations treated at 100 hospital ... and found that the overall incidence rate was 23.9 shoulder ...
Cached Medicine News:Health News:'Less Is More' with the Innovation of Avemar(R) Fermented Wheat Germ Extract 2Health News:'Less Is More' with the Innovation of Avemar(R) Fermented Wheat Germ Extract 3Health News:'Less Is More' with the Innovation of Avemar(R) Fermented Wheat Germ Extract 4Health News:'Less Is More' with the Innovation of Avemar(R) Fermented Wheat Germ Extract 5Health News:Cowen Group Announces Promotions in Health Care Investment Banking 2Health News:Cowen Group Announces Promotions in Health Care Investment Banking 3Health News:Alan Henry, M.D. Joins MedSolutions as Chief Medical Officer of Premerus 2Health News:Alan Henry, M.D. Joins MedSolutions as Chief Medical Officer of Premerus 3Health News:Alan Henry, M.D. Joins MedSolutions as Chief Medical Officer of Premerus 4Health News:Alan Henry, M.D. Joins MedSolutions as Chief Medical Officer of Premerus 5Health News:Alan Henry, M.D. Joins MedSolutions as Chief Medical Officer of Premerus 6Health News:Physicians come together on National Colorectal Cancer Awareness and Screening Day 2Health News:Treatment of portal hypertensive pulmonary lesions induced by schistosomiasis 2Health News:Shoulder Dislocations a Sports Hazard 2
(Date:8/29/2014)... 29, 2014 Thoratec Corporation (NASDAQ: ... support therapies to save, support and restore failing hearts, ... Morgan Stanley Global Healthcare Conference on Wednesday, September 10. ... Chief Executive Officer, will provide an update on the ... a.m., Pacific Daylight Time).   A webcast ...
(Date:8/29/2014)... DUBLIN , Aug. 29, 2014 ... the "China Orthopedic Instrument Industry Report, 2014-2017" ... accelerated aging population and rising proportion of reimbursement for ... been effectively released, with its scale presenting a CAGR ... joint products are three product segments of orthopedic instruments ...
(Date:8/29/2014)... Aug. 29, 2014 Research and Markets  has ... Pipeline Insight 2014" report to their offering. ... is one of the largest segments of pharmaceuticals industry. The ... while the available therapies were unable to meet the market ... market for CNS disorder, especially over the past two decades. ...
Breaking Medicine Technology:China Orthopedic Instrument Industry Report, 2014-2017 2US CNS Disorders Drug Pipeline Insight 2014 2
... Calf Implants are available in ... They are available non-sterile and ... sold individually. Depending on the ... use one or two implants ...
... the IQmark family elevates your ECG and Spirometry ... cost-savings and efficient patient care. The IQmark Diagnostic ... office, clinics and medical centers as well as ... in conjunction with the IQmark Digital ECG PDA ...
... Designed as an interactive data-gathering extension of ... Holter runs on your Windows-based PC to ... use in comparative diagnosis. Now you can ... your Workstation with the simple click of ...
... IQmark Digital ECG is a highly advanced and ... Windows personal computer. Everything you need to get ... acquisition and operating costs of the IQmark Digital ... stand-alone ECG machines (even including the cost of ...
Medicine Products: