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:7/31/2015)... Chicago, IL (PRWEB) , ... July 31, 2015 , ... ... which is currently going on in Chicago at Grant Park. The festival ... every corner of North America to Chicago for the annual Lollapalooza. This unique ...
(Date:7/31/2015)... ... July 31, 2015 , ... ... run by GoodThreads. The store can be accessed by visiting http://www.curemeso.org/store . ... which are customizable. The best part: whenever a product is purchased, the Meso ...
(Date:7/31/2015)... ... July 31, 2015 , ... There’s no better way to enjoy ... comes time to cook the next meal, making July the most appropriate to be ... grilling tips and recipes. , Make the next cookout different than the ones in ...
(Date:7/31/2015)... ... , ... Coco Libre announced today that their flagship Organic Coconut Water will ... US Open of Surfing, July 25 through August 2 in Huntington Beach, California. Coco ... market, is a natural choice given the Open’s commitment to sustainable practices. , ...
(Date:7/31/2015)... ... 31, 2015 , ... According to the article published July 27 on My News ... contained and extinguished by the city’s fire department before it caused major damage throughout the ... of the fire, and it was a fire alarm system that tipped off fire fighters ...
Breaking Medicine News(10 mins):Health News:Cheap 2015 Lollapalooza Tickets: Ticket Down Slashes Ticket Prices on Lollapalooza Tickets at Grant Park in Chicago for Saturday, August 1st and Sunday, August 2nd 2Health News:Mesothelioma Organization Launches New Store 2Health News:Mesothelioma Organization Launches New Store 3Health News:King Kullen Honors National Hot Dog and Blueberry Month 2Health News:King Kullen Honors National Hot Dog and Blueberry Month 3Health News:Coco Libre Brings Eco-conscious Hydration to Vans US Open of Surfing 2Health News:Article on Recent Pasadena Courtroom Fire Highlights the Effectiveness of Fire Alarm Systems, Says Fire Protection Group Inc 2Health News:Article on Recent Pasadena Courtroom Fire Highlights the Effectiveness of Fire Alarm Systems, Says Fire Protection Group Inc 3
(Date:7/31/2015)... SAN DIEGO , July 31, 2015  Eisai ... Ltd. (Headquarters: Tokyo , President and ... Inc. (Headquarters: San Diego, California , ... HALO") have signed a clinical collaboration agreement to evaluate ... in combination with Halozyme,s investigational drug PEGPH20 (PEGylated recombinant ...
(Date:7/31/2015)... According to a new market ... Analyzers (BIA), Dual-Energy X-ray Absorptiometry (DEXA), Skinfold Calipers, Air ... & Forecast to 2019", published by MarketsandMarkets, the global ... 2014 and is estimated to grow to $1,425.7 Million ... 2014 to 2019. Browse 41 market ...
(Date:7/30/2015)... , July 30, 2015 Edwards Lifesciences Corporation (NYSE: ... heart valves and hemodynamic monitoring, today announced that Robert ... Directors. "Bob is an ardent champion for innovation ... privilege to have him on Edwards, board as we pursue ... Edwards, chairman and CEO.  "Bob has provided a valuable perspective ...
Breaking Medicine Technology:Eisai and Halozyme Sign Collaboration Agreement to Investigate Eribulin and PEGPH20 in Metastatic Breast Cancer 2Eisai and Halozyme Sign Collaboration Agreement to Investigate Eribulin and PEGPH20 in Metastatic Breast Cancer 3Eisai and Halozyme Sign Collaboration Agreement to Investigate Eribulin and PEGPH20 in Metastatic Breast Cancer 4Eisai and Halozyme Sign Collaboration Agreement to Investigate Eribulin and PEGPH20 in Metastatic Breast Cancer 5Eisai and Halozyme Sign Collaboration Agreement to Investigate Eribulin and PEGPH20 in Metastatic Breast Cancer 6Body Composition Analyzers Market Worth $1,425.7 Million by 2019 2Body Composition Analyzers Market Worth $1,425.7 Million by 2019 3Body Composition Analyzers Market Worth $1,425.7 Million by 2019 4
Cached News: