Featured Research

from universities, journals, and other organizations

Scientists Propose Sweeping Changes To Naming Of Bird Neurosystems

Date:
February 4, 2005
Source:
National Science Foundation
Summary:
Duke University neurobiologist Erich Jarvis and a team of 28 other neuroscientists have proposed sweeping changes to the terminology associated with the brain structures of birds--a century-old nomenclature the researchers consider outdated and irrelevant to birds' true brainpower.

A wide range of studies have recently demonstrated that the so-called "primitive" regions of avian brains are actually sophisticated processing regions homologous to those in mammals. The above illustrations compare the traditional view of the primitive avian brain as a subregion of the human brain (in purple) with the new view that the avian brain has subregions proportional to those in humans (blue, purple and green). Scientists now know that the complexities of avian brain regions allow sensory processing, motor control and sensorimotor learning as in the mammalian neocortex (in green).
Credit: Zina Deretsky, National Science Foundation

ARLINGTON, Va. -- Duke University neurobiologist Erich Jarvis and a team of 28 other neuroscientists have proposed sweeping changes to the terminology associated with the brain structures of birds--a century-old nomenclature the researchers consider outdated and irrelevant to birds' true brainpower.

The international research group concludes in a Feb. 2005, paper published in Nature Reviews Neuroscience that significant discoveries made over time reveal that birds are much closer to mammals in cognitive ability, and therefore, a new consistency in language will enhance studies of both.

In the journal's "Perspectives" column, authors describe a wide range of studies demonstrating that the so-called "primitive" regions of avian brains are actually sophisticated processing regions homologous to those in mammals. Those studies, which included tracing of neural pathways and behavior, showed that such avian brain regions carry out sensory processing, motor control and sensorimotor learning just as the mammalian neocortex. The scientists add that molecular studies reveal the avian and mammalian brain regions are comparable in their genetic and biochemical machinery.

In the same column, Jarvis and members of the Avian Brain Nomenclature Consortium reason that the old view of evolution in birds is no longer valid. Citing technical revisions to the nomenclature that were published in a May 2004, issue of the Journal of Comparative Neurology, consortium members assert in the new article that the old terminology--which implied that the avian brain was more primitive than the mammalian brain--has hindered scientific understanding.

"We believe that names have a powerful influence on the experiments we do and the way in which we think," wrote the authors of the new report. "Our current understanding of the avian brain requires a new terminology that better reflects these functions and the homologies between avian and mammalian brains."

The consortium's efforts were supported by the National Science Foundation (NSF) and the National Institutes of Health (NIH). Lead author Jarvis organized the Duke conference in 2002 that brought together the many researchers in neuroscience and neuroanatomy to undertake discussions of the needed changes.

The group believed the previous terminology and associated concepts of how to define avian brain structure and avian brain evolution stymied efforts to directly link discoveries in the avian brain with those of other mammals. Jarvis, whose seminal work in vocal learning in birds garnered him $500,000 in 2002 as recipient of NSF's Waterman Award, acknowledged that the award came at a critical time in his work with the consortium.

"The impact of this work will go far beyond simple comparative anatomy," Jarvis said. "There is strong interest across neuroscience in using birds as models for learning and development, and migratory and social behavior."

The revision of the nomenclature for avian brains would replace a system developed in the 19th century by Ludwig Edinger, considered the father of comparative neuroanatomy. Edinger's system was based on a then-common practice of combining Darwin's recent theory of evolution and Aristotle's old concept that there exists a natural "scale" of creatures from lowest to highest. The prevailing views became that evolution was progressive from organisms with "lower" intelligence to those with "higher" intelligence and that evolution had a purpose--the generation of humans.

In the new view, the neocortex and related areas in the mammalian brain are derived from a region in the embryonic cerebrum called the pallium, or covering, a very different conclusion from Edinger's, which considered this region in the bird cerebrum part of the basal ganglia.

The consortium's work actually began in 1997, and was organized by Jarvis, Anton Reiner of the University of Tennessee Health Science Center in Memphis, Martin Wild of the University of Auckland in New Zealand, and other neurobiologists, who called themselves the "ThinkTank." Encouraging scientists to adjust their traditions and thinking based on new knowledge coming from the field had a rocky start, so the effort to change avian brain nomenclature turned into a seven-year project, with a steady add-on of new recruits. This effort culminated in the international scientific forum at Duke University in 2002, from which the new nomenclature was developed.

"We knew that we were doing something that may have an impact, not only on the immediate conduct of research in neuroscience, but on neuroscience for the next hundred years," said Jarvis. "And this nomenclature will help people understand that evolution has created more than one way to generate complex behavior--the mammal way and the bird way. And they're comparable to one another. In fact, some birds have evolved cognitive abilities that are far more complex than in many mammals."


Story Source:

The above story is based on materials provided by National Science Foundation. Note: Materials may be edited for content and length.


Cite This Page:

National Science Foundation. "Scientists Propose Sweeping Changes To Naming Of Bird Neurosystems." ScienceDaily. ScienceDaily, 4 February 2005. <www.sciencedaily.com/releases/2005/02/050201193758.htm>.
National Science Foundation. (2005, February 4). Scientists Propose Sweeping Changes To Naming Of Bird Neurosystems. ScienceDaily. Retrieved July 29, 2014 from www.sciencedaily.com/releases/2005/02/050201193758.htm
National Science Foundation. "Scientists Propose Sweeping Changes To Naming Of Bird Neurosystems." ScienceDaily. www.sciencedaily.com/releases/2005/02/050201193758.htm (accessed July 29, 2014).

Share This




More Plants & Animals News

Tuesday, July 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Deadly Ebola Virus Threatens West Africa

Deadly Ebola Virus Threatens West Africa

AP (July 28, 2014) West African nations and international health organizations are working to contain the largest Ebola outbreak in history. It's one of the deadliest diseases known to man, but the CDC says it's unlikely to spread in the U.S. (July 28) Video provided by AP
Powered by NewsLook.com
Traditional African Dishes Teach Healthy Eating

Traditional African Dishes Teach Healthy Eating

AP (July 28, 2014) Classes are being offered nationwide to encourage African Americans to learn about cooking fresh foods based on traditional African cuisine. The program is trying to combat obesity, heart disease and other ailments often linked to diet. (July 28) Video provided by AP
Powered by NewsLook.com
Asteroid's Timing Was 'Colossal Bad Luck' For The Dinosaurs

Asteroid's Timing Was 'Colossal Bad Luck' For The Dinosaurs

Newsy (July 28, 2014) The asteroid that killed the dinosaurs struck at the worst time for them. A new study says that if it hit earlier or later, they might've survived. Video provided by Newsy
Powered by NewsLook.com
Raw: Sea Turtle Hatchlings Emerge from Nest

Raw: Sea Turtle Hatchlings Emerge from Nest

AP (July 27, 2014) A live-streaming webcam catches loggerhead sea turtle hatchlings emerging from a nest in the Florida Keys. (July 27) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins