Navigation Links
Primates' brains make visual maps using triangular grids
Date:10/28/2012

ical Engineering at Georgia Tech and Emory University. "This is an exciting way of thinking about memory that may lead to novel treatments for neurodegenerative diseases."

In the experiments in which rats' grid cells were identified, the cells fired whenever the rats crossed lines on an invisible triangular grid.

"The surprising thing was that we could identify cells that behaved in the same way when the monkeys were simply moving their eyes," Buffalo says. "It suggests that primates don't have to actually visit a place to construct the same kind of mental map."

Another aspect of grid cells not previously seen with rodents is that the cells' responses change when monkeys are seeing an image for the second time. Specifically, the grid cells reduce their firing rate when a repeat image is seen. Moving from the posterior (rear) toward the anterior (front) of the entorhinal cortex, more neurons show memory responses.

"These results demonstrate that grid cells are involved in memory, not just mapping the visual field," Killian says.

Consistent with previous reports on grid cells in rats, Killian and Buffalo observed "theta-band" oscillations, where grid cells fire in a rhythmic way, from 3 to 12 times per second. Some scientists have proposed that theta oscillations are important for grid cell networks to be generated in development, and also for the brain to put together information from the grid cells. In the monkeys, populations of neurons exhibited theta oscillations that occurred in intermittent bouts, but these bouts did not appear to be critical for formation of the spatial representation.

Vision is thought to be a more prominent sense for primates (monkeys and humans) compared with rodents, for whom touch and smell are more important. While grid cells in rodents and primates were detected in different types of experiments, Buffalo says that it doesn't mean grid cells necessarily have a different nature in pri
'/>"/>

Contact: Quinn Eastman
qeastma@emory.edu
404-727-7829
Emory University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. The old primates club: Even male monkeys ride their fathers coattails to success
2. Transgenic technique to eliminate a specific neural circuit of the brain in primates
3. Out of the mouths of primates, facial mechanics of human speech may have evolved
4. Manipulation of a specific neural circuit buried in complicated brain networks in primates
5. Good news for nanomedicine: Quantum dots appear safe in pioneering study on primates
6. Preemies brains reap long-term benefits from Kangaroo Mother Care
7. Mice with big brains provide insight into brain regeneration and developmental disorders
8. University of Alberta led research may have discovered how memories are encoded in our brains
9. Military vision research symposium focuses on visual fallout from war
10. Stealthy microscopy method visualizes E. coli sub-cellular structure in 3-D
11. 2 NASA visualizations selected for computers graphics showcase
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/24/2014)...  Since its launch in December 2014, the ... eliminate the pain of trying to remember their usernames ... own biometrics fused to their smartphones. To assist people ... Hoyos Labs , the company that created 1U and ... offering the app for free. 1U is ...
(Date:12/22/2014)... Conn. , Dec. 22, 2014  NXT-ID, Inc. ... the "Company"), a biometric authentication company focused on the ... pickpocket, entertainer and security consultant, Apollo Robbins ... biometric smart wallet.  Apollo Robbins ... and 7 th , 2015, demonstrating some of his ...
(Date:12/22/2014)... 2014 Research and Markets ... of the "The Global Watermarking and ... http://photos.prnewswire.com/prnh/20130307/600769 ... of the global digital media watermarking and ... monitor piracy by securely and invisibly embedding ...
Breaking Biology News(10 mins):1U Offers Best Solution to the Username / Password Dilemma: For FREE! 21U Offers Best Solution to the Username / Password Dilemma: For FREE! 3NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 2NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 3NXT-ID Hires Master Pickpocket and Security Consultant Apollo Robbins for Wocket Smart Wallet CES 2015 Debut 4The Global Watermarking and Fingerprinting Markets 2
... Calif. Each year, dengue fever infects as many as ... 30,000 deaths worldwide. Both diseases are spread by infected ... to produce eggs. The blood feeding and the egg development ... virus. Now a team of entomologists at the University ...
... a jetliner act and feel one way when crammed together ... different mindset when the middle seat is empty and they ... that exists among the proteins involved in health and disease ... of Chemical & Engineering News (C&EN), ACS, weekly newsmagazine, focuses ...
... 2, 2010) SAGE has extended its suite of ... two titles: Therapeutic Advances in Drug Safety , ... Therapeutic Advances in Drug Safety covers novel ... drugs in different age and ethnic patient groups, drug ...
Cached Biology News:Discovery by UC Riverside entomologists could shrink dengue-spreading mosquito population 2
(Date:12/22/2014)... Dec. 22, 2014  ( www.competitivehealth.com ) — Competitive ... medical bill review and advocacy service, has signed an ... WellCard Savings discount health services marketplace. 63% ... more than they expected to pay. As part of ... costs, WellCard Savings is pleased to offer medical bill ...
(Date:12/22/2014)... 22, 2014 Fertility Associates of Memphis ... Bank USA , a network of more than 20 ... partnership, patients have fast access to a national pool ... IVF . Fertility Associates of Memphis is the only ... treatment option. , Dr. William Kutteh , director ...
(Date:12/19/2014)... BioPlus Specialty Pharmacy (BioPlus), one ... of Nick Maroulis, Pharm.D. to the newly created position ... In this position, Dr. Maroulis will continue to manage ... of our multi-site pharmacies as the company expands. Dr. ... that time he has served in many different capacities ...
(Date:12/19/2014)... Dec. 19, 2014 Bina Technologies, Inc. (Bina, ... that they have been acquired by Roche (SIX: RO, ... privately held company that provides a big data platform ... (NGS) data for the academic and translational research markets. ... and will continue to focus on development of their ...
Breaking Biology Technology:WellCard Savings Announces CoPatient Medical Bill Review Service for Members 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 3BioPlus Specialty Pharmacy Promotes Dr. Nick Maroulis to Vice President of Specialty Pharmacy Services 2Bina Technologies is acquired by Roche. 2Bina Technologies is acquired by Roche. 3
... ... to provide online tutorial suite, Quick Reference Cards, and other training and outreach programs. ... Seattle, WA (PRWEB) April 13, ... has partnered with OpenHelixTM to provide comprehensive training and outreach programs for its ...
... Researchers at Uppsala University have developed a new method ... Hopes are strong that the method represents an important ... new diagnostic tests. The new method, which ... should enable studies of the effects of genetic variation ...
... ... Deliver Results Faster with New User Interface and Improved Support for Complex Experiments. ... (PRWEB) April 12, ... life science research, today announced Genedata Screener® 8. Developed over the past year to ...
Cached Biology Technology:RCSB PDB Teams with OpenHelix to Announce Free Tutorial and Training Materials 2RCSB PDB Teams with OpenHelix to Announce Free Tutorial and Training Materials 3Mutations directly identifiable in active genes 2Genedata Screener 8 Advancing Analysis of HCS, HTS and Time Series Data Debuts at SBS 16th Annual Conference 2Genedata Screener 8 Advancing Analysis of HCS, HTS and Time Series Data Debuts at SBS 16th Annual Conference 3Genedata Screener 8 Advancing Analysis of HCS, HTS and Time Series Data Debuts at SBS 16th Annual Conference 4