HOME >> MEDICINE >> NEWS
Triple code

Is there a universal neural code for sensation, similar to the genetic code, in which the complexity of sense and experience can be reduced to a few simple rules? According to Prof. Ehud Ahissar of the Weizmann Institute's Neurobiology Department, the answer might be no. He and his team have been studying how rats use their whiskers to sense their environment, and have found that the seemingly simple act of feeling out a 3-D object requires three different types of code.

Rats' whiskers are highly developed sense organs in the normally nocturnal animals. To get a fix on their surroundings, rats whisk their whiskers back and forth as they move. Researchers had previously shown that whisking is crucial to the act of sensing, but how does the rat's brain map out a three-dimensional object using this movement?

Sensing begins in the neurons at the whiskers' bases, which then fire signals off to the brain. The scientists, Marcin Szwed, Knarik Bagdasarian and Ahissar, found that in perceiving each of the three dimensions in the rat's immediate surroundings the horizontal, the vertical, and the radial (distance from the whisker base) the neurons encode information in a completely different form. To sense the horizontal, for instance, the neurons fire with exact temporal precision and the timing of these signals relative to the whisking motion encodes the horizontal placement of an object. The radial, on the other hand, is encoded in quantity, specifically the number of times the neurons fire. The closer an object was to the rat's snout, the higher the number of neuron-signaling spikes the team recorded. Height seems to be sensed through spacing: Since whisking only takes place in the horizontal plane, the researchers concluded that information about the vertical dimensions of an object is mapped out in the vertical placement of the whiskers, which are arranged grid-like on either side of the snout.

In addition to finding different codes for each d
'"/>

Contact: Elizabeth McCrocklin
EMcCrocklin@jgordonassociates.com
212-871-3020
American Committee for the Weizmann Institute of Science
2-Feb-2006


Page: 1 2

Related medicine news :

1. Minimally invasive procedure restores blood flow to kidneys, research suggests
2. Minimally invasive approach can take the pain out of herniated disks
3. Minimally invasive approach can work for many thyroid patients
4. Minimally invasive surgery may increase options for octogenarians with some lung cancers
5. Minimally invasive solid tumor biopsy may replace surgery to get diagnostic specimens
6. New Mayo Clinic MRI technology enables noninvasive liver diagnoses
7. USC-led study suggests exercise reduces risk of developing invasive breast cancer
8. New data supports a non-invasive approach to routine prenatal genetic testing
9. New research explores limits of non-invasive coronary imaging tests
10. A simple, noninvasive test measures survival time in adult pulmonary hypertension
11. German researchers develop first non-invasive test to measure skin aging

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Triple code

(Date:5/24/2015)... NY (PRWEB) May 24, 2015 The ... Sunday, May 24th in San Diego at Petco Park. ... North America. On May 20th, they had a warmup ... At their preview show in Los Angeles, this beloved band ... they also played fan favorites such as "Jumping Jack Flash," ...
(Date:5/24/2015)... May 24, 2015 For people who ... Chinese Enterokinase Industry, 2009-2019 Market Research Report would be ... an exhaustive study on the present market scenario of ... into the growing Chinese market of this industry. The ... overall status of the manufacturers in this industry. The ...
(Date:5/24/2015)... 24, 2015 Scientists with Cardno ChemRisk, ... air quality compliance issues that may have raised the ... Mesothelioma has just posted an article on the research. ... The group found airborne asbestos levels well above OSHA ... 1984 and 2011. , “Asbestos compliance sampling data associated ...
(Date:5/24/2015)... 24, 2015 The federal court ... ) has scheduled its next monthly Case Management ... litigation. According to court documents filed in the ... Conference will be convened on June 2, 2015, ... Product Liability Litigation - MDL No. 2545) , ...
(Date:5/24/2015)... Indianapolis, Indiana (PRWEB) May 24, 2015 ... network service provider announces Midwest Telecom of America, Inc. ... , According to Cory Childs, IFN Enterprise Sales ... to service providers. “IFN’s fiber transport provides MTA ... Operations Center to their Tier 1 Internet and voice ...
Breaking Medicine News(10 mins):Health News:The Rolling Stones Tickets in San Diego, Orlando, Minneapolis, Dallas, Pittsburgh, Indianapolis, Atlanta, Detroit, Milwaukee, Kansas City, Columbus, Nashville & Raleigh 2Health News:Global and Chinese Enterokinase Industry 2009-2019 Market Research Report Now Available at RnRMarketResearch.com 2Health News:Global and Chinese Enterokinase Industry 2009-2019 Market Research Report Now Available at RnRMarketResearch.com 3Health News:Global and Chinese Enterokinase Industry 2009-2019 Market Research Report Now Available at RnRMarketResearch.com 4Health News:New Analysis Finds Too Many Employers Ignored OSHA Asbestos Guidelines, According to Surviving Mesothelioma 2Health News:Testosterone Lawsuit Attorneys at Bernstein Liebhard LLP Look Ahead to June Conference in Federal Multidistrict Litigation 2Health News:Testosterone Lawsuit Attorneys at Bernstein Liebhard LLP Look Ahead to June Conference in Federal Multidistrict Litigation 3Health News:Indiana Fiber Network, LLC Enables Midwest Telecom of America with Fiber Route Diversity 2
(Date:5/22/2015)... More than fifty years ago, Thalidomide was approved by Health ... Tragically, Thalidomide caused serious and permanent physical and emotional damage ... been provided to survivors over the years from sources including ... in 1991 and settlements from drug companies. ... support, we have a clear moral obligation to help meet ...
(Date:5/22/2015)... ORLANDO, Fla. , May 22, 2015 ... Copay Assistance Program. This program provides financial assistance for ... "We are pleased to announce the addition of the ... programs," stated Mark McGreevy , executive director. "With ... mission and vision of a world where no one ...
(Date:5/22/2015)... , May 22, 2015 The North ... 2014 and is estimated to reach $90.7 million by 2019, ... Browse through the TOC of North America Dental Lasers ... the help of various tables and figures. ... customization on this report.   Dental lasers ...
Breaking Medicine Technology:Statement from Minister Ambrose on Thalidomide 2Statement from Minister Ambrose on Thalidomide 3The Assistance Fund Adds Melanoma Assistance Program 2North America Dental Lasers Market is Expected to Reach $90.7 Million by 2019, at a CAGR of 9.2% From 2014 to 2019 2North America Dental Lasers Market is Expected to Reach $90.7 Million by 2019, at a CAGR of 9.2% From 2014 to 2019 3
Cached News: