Navigation Links
Has evolution given humans unique brain structures?
Date:2/22/2013

Our ancestors evolutionarily split from those of rhesus monkeys about 25 million years ago. Since then, brain areas have been added, have disappeared or have changed in function. This raises the question, 'Has evolution given humans unique brain structures?'. Scientists have entertained the idea before but conclusive evidence was lacking. By combining different research methods, we now have a first piece of evidence that could prove that humans have unique cortical brain networks.

Professor Vanduffel explains: "We did functional brain scans in humans and rhesus monkeys at rest and while watching a movie to compare both the place and the function of cortical brain networks. Even at rest, the brain is very active. Different brain areas that are active simultaneously during rest form so-called 'resting state' networks. For the most part, these resting state networks in humans and monkeys are surprisingly similar, but we found two networks unique to humans and one unique network in the monkey."

"When watching a movie, the cortex processes an enormous amount of visual and auditory information. The human-specific resting state networks react to this stimulation in a totally different way than any part of the monkey brain. This means that they also have a different function than any of the resting state networks found in the monkey. In other words, brain structures that are unique in humans are anatomically absent in the monkey and there no other brain structures in the monkey that have an analogous function. Our unique brain areas are primarily located high at the back and at the front of the cortex and are probably related to specific human cognitive abilities, such as human-specific intelligence."

The study used fMRI (functional Magnetic Resonance Imaging) scans to visualise brain activity. fMRI scans map functional activity in the brain by detecting changes in blood flow. The oxygen content and the amount of blood in a given brain area vary according to a particular task, thus allowing activity to be tracked.


'/>"/>

Contact: Wim Vanduffel
wim.vanduffel@med.kuleuven.be
32-016-330-666
KU Leuven
Source:Eurekalert

Related medicine news :

1. Males superior spatial ability likely is not an evolutionary adaptation
2. Pulitzer Prize Winner, Chief Experience Officer, to Keynote Patient Safety Solution Evolution
3. Study tracks leukemias genetic evolution, may help predict disease course, tailor care
4. New Sleep Mask for Perfect Sleep: Zeepo, the Revolutionary Strapless Eye Mask that Completely Blocks Out Light
5. Evolution Keratin Strikes Exclusive Deal With Proline Beauty Distributors
6. LifeWings Provides 7 Steps to Revolutionize Patient Safety Management
7. simplifyMD Revolutionizes the EHR Software Trial Process with the introduction of simpleStart™
8. Breakthrough HIV Technology Could Revolutionize Patient Care in Zimbabwe
9. A new mechanism that contributes to the evolution of cancer
10. Rutgers professor recognized for revolutionizing agriculture
11. Economic analysis finds penicillin, not "the pill," may have launched the sexual revolution
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/26/2017)... ... May 26, 2017 , ... Mediaplanet is proud to announce the ... USA Today, which will educate readers on how to take care of all aspects ... focus is placed on melanoma. Dancing with the Stars professional, Witney Carson, shares her ...
(Date:5/26/2017)... ... May 26, 2017 , ... ... a new educational seminar to focus on current legislative activity and the latest ... begin at 1 p.m. Sunday, Sept. 10, and will continue through Monday, Sept. ...
(Date:5/26/2017)... ... May 26, 2017 , ... A new analysis of community ... healthiest seniors are located in the Midwest. With the average cost of healthcare rising ... are concerned with both the quality and affordability of where they live. An annual ...
(Date:5/26/2017)... ... 26, 2017 , ... On May 24, the Congressional Budget Office (CBO) projected ... on May 4, would result in 23 million Americans losing their health insurance by ... Patient Protection and Affordable Care Act (ACA). , “It is clear from the ...
(Date:5/26/2017)... ... May 26, 2017 , ... Silver Birch of Hammond, a new ... on more than four acres of land at 5620 Sohl Avenue in Hammond, serves ... square-foot building includes 125 studio and one-bedroom apartments. Each of the private apartments at ...
Breaking Medicine News(10 mins):
(Date:5/10/2017)... -- Radiology has become the number one diagnostic tool ... to the number one ranking as a result.  More ... as the most complete and reliable method for clinical ... pain an MRI may confirm a suspected herniated disc ... entirely different treatment protocols.  In these circumstances, patients need ...
(Date:5/9/2017)... , May 9, 2017 Zimmer Biomet Holdings, ... musculoskeletal healthcare, today announced it has earned a spot ... 2017" list. The Company was ranked among 500 U.S. ... Employers and Healthcare Equipment and Services. The ... on an anonymous, independent survey of over 30,000 employees ...
(Date:5/9/2017)...  Oramed Pharmaceuticals Inc. (NASDAQ: ORMP ... focused on the development of oral drug delivery ... Office has granted Oramed a patent titled, "Methods ... patent covers Oramed,s invention of an oral glucagon-like ... incretin hormone that stimulates the secretion of insulin ...
Breaking Medicine Technology: