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:7/28/2014)... (PRWEB) July 28, 2014 The Wireline Services ... market in Europe with analysis and forecast of revenue. The ... around $1.3 billion in 2013 to $2.4 billion by 2019, ... Browse through the TOC of the Wireline Services Market in ... provided. This also provides a glimpse of the segmentation in ...
(Date:7/28/2014)... 2014 The North America Carotenoids & Antioxidants ... in North America with analysis and forecast of revenue. This ... 2012 to $812.7 million by 2018, at a CAGR of ... of the North America Carotenoids & Antioxidants Market report to ... provides a glimpse of the segmentation in the market, and ...
(Date:7/28/2014)... (HealthDay News) -- A common inflammatory muscle disorder ... may increase the risk for heart attack and ... study found that patients with polymyalgia rheumatica are ... that affect the blood vessels. Doctors should carefully ... polymyalgia rheumatica to reduce their risk for complications, ...
(Date:7/28/2014)... The Oneida Indian Nation today announced ... of accompanying PGA TOUR players will be teeing up ... Begay III for the seventh annual Notah Begay III ... Casino ’s Atunyote® Golf Club on Wednesday, August 27, ... Dufner, Jimmy Walker, Jonas Blixt, Angel Cabrera and Louis ...
(Date:7/28/2014)... 2014A two-step decision tree analysis, incorporating Donabedian,s model, ... the many available quality standards, guidelines, recommendations and ... international quality standards for radiation therapy, according to ... of Practical Radiation Oncology (PRO), the ... for Radiation Oncology (ASTRO). , Guidelines, recommendations and ...
Breaking Medicine News(10 mins):Health News:Europe Wireline Services Market is Expected to Reach $2.4 billion in 2019 - New Report by MicroMarket Monitor 2Health News:Europe Wireline Services Market is Expected to Reach $2.4 billion in 2019 - New Report by MicroMarket Monitor 3Health News:Europe Wireline Services Market is Expected to Reach $2.4 billion in 2019 - New Report by MicroMarket Monitor 4Health News:North America Carotenoids & Antioxidants (Nutraceuticals) Market is Expected to Reach $812.7 Million in 2018 - New Report by MicroMarket Monitor 2Health News:North America Carotenoids & Antioxidants (Nutraceuticals) Market is Expected to Reach $812.7 Million in 2018 - New Report by MicroMarket Monitor 3Health News:North America Carotenoids & Antioxidants (Nutraceuticals) Market is Expected to Reach $812.7 Million in 2018 - New Report by MicroMarket Monitor 4Health News:Inflammatory Muscle Disorder May Raise Risk for Heart Attack, Stroke 2Health News:Turning Stone Announces that Tiger Woods and Fellow Golfing Elites Will Play at the Seventh Annual Notah Begay III Foundation Challenge 2Health News:Turning Stone Announces that Tiger Woods and Fellow Golfing Elites Will Play at the Seventh Annual Notah Begay III Foundation Challenge 3Health News:Turning Stone Announces that Tiger Woods and Fellow Golfing Elites Will Play at the Seventh Annual Notah Begay III Foundation Challenge 4Health News:Turning Stone Announces that Tiger Woods and Fellow Golfing Elites Will Play at the Seventh Annual Notah Begay III Foundation Challenge 5Health News:Two-step decision tree analysis helps inform updates of RT best practices, quality standards 2Health News:Two-step decision tree analysis helps inform updates of RT best practices, quality standards 3
(Date:7/28/2014)... 2014   Cardioxyl Pharmaceuticals, Inc. announced today ... CXL-1427, a novel potential treatment for acute decompensated heart ... company has now initiated dosing of hospitalized patients with ... designed to further evaluate the drug,s safety and tolerability ... Phase I clinical trial evaluated the safety and tolerability ...
(Date:7/28/2014)... 28, 2014  ProteinSimple announced today that it has ... new assay allows users to detect all proteins separated ... Western users can analyze proteins without the need for ... changed protein analysis as we know it today. First, the ... - no messy gels, no transfer tanks, no blots, ...
(Date:7/27/2014)... /PRNewswire-iReach/ -- This is a professional and ... Vardenafil (CAS 224785-90-4) industry. The report firstly ... 224785-90-4) including its classification, application and manufacturing ... China,s top manufacturers of Vardenafil (CAS 224785-90-4) ... cost, gross margin and market share etc. ...
Breaking Medicine Technology:Cardioxyl Pharmaceuticals Successfully Completes First Clinical Trial For Heart Failure Drug CXL-1427 2ProteinSimple Says "Never Run a Gel Again!" 2Global and Chinese Vardenafil Industry (CAS 224785-90-4) 2019 Forecasts 2Global and Chinese Vardenafil Industry (CAS 224785-90-4) 2019 Forecasts 3Global and Chinese Vardenafil Industry (CAS 224785-90-4) 2019 Forecasts 4
Cached News: