Navigation Links
Anthropologist finds explanation for hominin brain evolution in famous fossil
Date:5/7/2012

TALLAHASSEE, Fla. -- One of the world's most important fossils has a story to tell about the brain evolution of modern humans and their ancestors, according to Florida State University evolutionary anthropologist Dean Falk.

The Taung fossil the first australopithecine ever discovered has two significant features that were analyzed by Falk and a group of anthropological researchers. Their findings, which suggest brain evolution was a result of a complex set of interrelated dynamics in childbirth among new bipeds, were published May 7 in the prestigious Proceedings of the National Academy of Sciences.

"These findings are significant because they provide a highly plausible explanation as to why the hominin brain might grow larger and more complex," Falk said.

The first feature is a "persistent metopic suture," or unfused seam, in the frontal bone, which allows a baby's skull to be pliable during childbirth as it squeezes through the birth canal. In great apes gorillas, orangutans and chimpanzees the metopic suture closes shortly after birth. In humans, it does not fuse until around 2 years of age to accommodate rapid brain growth.

The second feature is the fossil's endocast, or imprint of the outside surface of the brain transferred to the inside of the skull. The endocast allows researchers to examine the brain's form and structure.

After examining the Taung fossil, as well as huge numbers of skulls belonging to apes and humans, as well as corresponding 3-D CT (three-dimensional computed tomographic) scans, and taking into account the fossil record for the past 3 million years, Falk and her colleagues noted three important findings: The persistent metopic suture is an adaptation for giving birth to babies with larger brains; is related to the shift to a rapidly growing brain after birth; and may be related to expansion in the frontal lobes.

"The persistent metopic suture, an advanced trait, probably
'/>"/>

Contact: Dean Falk
dfalk@fsu.edu
505-954-7249
Florida State University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Anthropologist discovers new fossil primate species in West Texas
2. Missouri elk are being reintroduced in the wrong part of the state, MU anthropologist says
3. Recently analyzed fossil was not human ancestor as claimed, anthropologists say
4. Hobbit fossils represent a new species, concludes University of Minnesota anthropologist
5. Texas A&M anthropologist discovers long-lost primate in Indonesia
6. LSU research finds orangutans host ancient jumping genes
7. Syracuse University study finds autumn advantage for invasive plants in eastern United States
8. Pacific islands may become refuge for corals in a warming climate, study finds
9. New study finds a protein combination is best to consume post-workout for building muscle
10. Study finds Western diet detrimental to fetal hippocampal tissue transplants
11. Study finds soda consumption increases overall stroke risk
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/30/2014)... Queen in Lewis Carroll,s Through the Looking Glass, ... University of Singapore improved a 35-year-old ecology model ... to millions of years. , The new model, ... the "Red Queen Effect," an evolutionary hypothesis introduced ... suggests that organisms must constantly increase their fitness ...
(Date:7/30/2014)... A deep-sea octopus protected and tended her eggs until ... published July 30, 2014 in the open-access journal ... Aquarium Research Institute and colleagues. , Octopuses typically have ... females protect and take care of their fertilized eggs ... eggs for 1 to 3 months, but little is ...
(Date:7/30/2014)... American Chemical Society (ACS) announced today that David L. ... ACS Biomaterials Science & Engineering as editor-in-chief. With ... the new journal will feature high-quality research in the ... or naturally derived materials that interact with living or ... it reflects the tremendous growth in the field of ...
Breaking Biology News(10 mins):Classic Lewis Carroll character inspires new ecological model 2Classic Lewis Carroll character inspires new ecological model 3Deep-sea octopus has longest-known egg-brooding period 2ACS Biomaterials Science & Engineering: Brand-new journal launches in 2015, names editor 2
... demonstrated systemic spread of avian influenza virus in cats ... paper by Rimmelzwaan et al., "Influenza A virus (H5N1) ... routes of virus spread within and between hosts," appears ... Pathology and is accompanied by a commentary. ...
... yet this year, but it seems like everyone's getting sick. ... more infectious invaders besides the flu to worry about. They ... down for days or weeks and cause thousands of deaths ... (RSV). Pronouncing the names of the microbes can be almost ...
... animals in the wild more easily from a car than ... tuned to the visual movements of an approaching predator's feet, ... this visual filter is used to signal the presence of ... and the force of gravity," suggests Dr. Troje, Canada Research ...
Cached Biology News:Avian influenza virus in mammals spreads beyond the site of infection to other organ systems 2Flu not the only germ threat this time of year 2Flu not the only germ threat this time of year 3Flu not the only germ threat this time of year 4Animal brains 'hard-wired' to recognize predator's foot movements, Queen's study suggests 2
(Date:7/30/2014)... , July 30, 2014   Wyle ... the Fully Integrated Lifecycle Mission Support Services (FILMSS) ... Administration (NASA). Under the terms of the contract, ... Center at Moffett Field, Calif. In particular, Wyle ... bioscience flight development projects on the International Space ...
(Date:7/30/2014)... July 30, 2014 Yuma Regional ... and complementary therapies brings comprehensive cancer care to ... Yuma Regional Cancer Center has officially opened. A ... program includes services such as open, semi-private and ... American Cancer Society Resource Center, hematology, rehabilitation center, ...
(Date:7/30/2014)... 2014  AtheroNova Inc. (OTCBB: AHRO), a biotech ... compounds to safely regress atherosclerotic plaque and improve ... partner, CardioNova, has accomplished first dosing of subjects ... lead compound, AHRO-001.  This Phase 1b trial will ... safety trial completed in February 2014, in which ...
(Date:7/30/2014)... 30, 2014 Adding to their already ... boat special – Buy 2 of any Weighing ... will benefit lab technicians looking for durable and reliable ... ideal for multiple applications including weighing liquids, solid, or ... choices including diamond-shaped, hexagonal, square, aluminum weighing, and standard ...
Breaking Biology Technology:Wyle Wins NASA's Fully Integrated Lifecycle Mission Support Services Contract 2Sate-of-the-Art Yuma Regional Cancer Center Officially Opens 2AtheroNova Announces Milestone with Initiation of Phase 1b Clinical Trial of AHRO-001 2AtheroNova Announces Milestone with Initiation of Phase 1b Clinical Trial of AHRO-001 3AtheroNova Announces Milestone with Initiation of Phase 1b Clinical Trial of AHRO-001 4Weighing Boat Promotion Now Available at Pipette.com, Major Pipette Distributor 2
... Purpose , Researchers and forensic agencies ... immuno- or colourimetric assays. These assays suffer from a number of limitations: , ... They are not as commonly available for novel sample matrices such as saliva ... They can be relatively costly due to the high volume of reagents used. ...
... , Purpose , ... the use of chloramphenicol (CAP) as a veterinary drug for food ... for the identification and quantification of CAP in milk and milk ... many analytical procedures are described in the literature, the presented method ...
... This application note illustrates an improved method to ... rubber nipple formulations were analyzed. Two formulations were composed ... silicone polymer and the remaining two were composed of ... to have a significantly higher concentration of NDMA and ...
Cached Biology Technology:Simultaneous Screening of 23 Drugs of Abuse in Oral Fluid Using an LC/MS/MS Method 2Simultaneous Screening of 23 Drugs of Abuse in Oral Fluid Using an LC/MS/MS Method 3Simultaneous Screening of 23 Drugs of Abuse in Oral Fluid Using an LC/MS/MS Method 4Determination of the Chloramphenicol residues in milk and milk products using LC/MS/MS 2Determination of the Chloramphenicol residues in milk and milk products using LC/MS/MS 3Determination of the Chloramphenicol residues in milk and milk products using LC/MS/MS 4Determination of the Chloramphenicol residues in milk and milk products using LC/MS/MS 5Determination of the Chloramphenicol residues in milk and milk products using LC/MS/MS 6Determination of N-nitrosamines in Baby Bottle Rubber Teats by Liquid Chromatography-Atmospheric Pressure Chemical Ionization Mass Spectrometry 2Determination of N-nitrosamines in Baby Bottle Rubber Teats by Liquid Chromatography-Atmospheric Pressure Chemical Ionization Mass Spectrometry 3
Schneider's Drosophila - Insect medium...
... System more than doubles the benefits of ... fast analysis cycles of the standard binary ... in tandem mode. Difficult separations are dramatically ... or heartcut configurations, on-line sample preparation is ...
... introduce random mutations to the gene supplied by ... into a vector of choice to obtain a ... can be set to a desired value within ... 106-108. Mutations can be restricted to a ...
... preparations are prepared from customers high-copy ... to multi-gram scales. Each preparation is ... glycerol stocks are maintained to facilitate ... (Clonal selection includes screening colonies for ...
Biology Products: