Navigation Links
Scientists explain the neurological process for the recognition of letters and numbers
Date:7/26/2010

"We analyzed the influence of the context given by a word when linking the physical traits of its components to the abstract representations of letters," explains to SINC Nicola Molinaro, main author of the study and researcher of the Basque Research Center on Cognition, Brain and Language (BCBL).

The results, published in Neuropsychologia journal, show that the linguistic context given by a word impacts the way in which single abstract representations of the letters that make it up are accessed, and that such access is partially independent from the physical properties of the stimuli.

"Otherwise, it would not be possible to think that a number can activate the representation of a letter when it is inserted among a string of letters that make up a word (M4T3R14L)," says Molinaro.

"We used numbers that visually resemble letters (1-I, 5-S, 7-T), and we replaced them," states the expert. The words were presented to participants during tenths of milliseconds (imperceptible to consciousness). Then, the correct words where shown so that participants could read them (for example, M4T3R14L - MATERIAL). Control strings including numbers explicitly different to letters (M9T6R26L- MATERIAL) and word identity (MATERIAL- MATERIAL) were also included.

The brain responds in three different ways

While participants read the words in silence, scientists recorded brain potentials associated to events (ERPs), which showed three main effects. The first one is that, over the 150 ms window, identical strings and strings including visually similar numbers, compared to control strings, caused a reduction in positivity, that is, in the ease of recognition.

"This effect shows that in the case of strings with letter-like numbers, the link between the visual physical representations of numbers and the abstract representations of correct letters is made automatically, given the visual overlapping among characters," points out the neuroscientist.

A second effect confirmed, at the 200 ms window, greater negativity for number conditions (M4T3R14L and M9T6R26L). "The brain recognizes that the elements that make up the strings presented unconsciously are in fact numbers, not letters, showing some specificity in the processing despite the initial visual overlapping found in the above component," he assures.

Lastly, 250 ms after the display of strings, the conditions of identity and visually letter-like numbers showed a very similar positive effect, clearly different from the effect caused by the strings with numbers that were visually different from letters (control).

"The global processing of words is very similar for strings that include letters that are properly written and for those including numbers that are visually similar to letters", concludes Molinaro.


'/>"/>

Contact: SINC Team
info@plataformasinc.es
0034-914-251-820
FECYT - Spanish Foundation for Science and Technology
Source:Eurekalert  

Related medicine news :

1. Scientists Pinpoint Area of Brain That Fears Losing Money
2. Scientists Discover How HIV Is Transmitted Between Men
3. Prevention Is Key Research Goal for Premature Babies, Scientists Say
4. Scientists Discover Molecular Pathway for Organ Tissue Regeneration and Repair
5. Scientists find donut-shaped structure of enzyme involved in energy metabolism
6. Neuroscientists reveal new links that regulate brain electrical activity
7. Two UCSF Scientists to Receive Prestigious Dementia Research Honor
8. Johns Hopkins scientists develop personalized blood tests for cancer using whole genome sequencing
9. Scientists Spot Genetic Fingerprints of Individual Cancers
10. Scientists Unravel Mysteries of Intelligence
11. MSU scientists develop more effective method of predicting lead-poisoning risk
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Scientists explain the neurological process for the recognition of letters and numbers
(Date:6/25/2017)... ... ... Month and the focus is on prostate cancer. Second only to skin cancer, prostate ... common cause of cancer related death today; lung cancer remains in the number one spot. ... during his lifetime. Those at highest risk are men who have a family ...
(Date:6/24/2017)... ... ... Doorknobs are for convenience, deadbolts are for security. , There are many ... an alarm system installed. But unless there is a working deadbolt lock that is ... Premier Locksmith in Killeen, TX says: “In the majority of home burglaries, intruders use ...
(Date:6/23/2017)... ... June 24, 2017 , ... Studies show evidence that carotenoids and antioxidants derived ... loss in these patients. , But how often do ophthalmologists and optometrists in Sweden ... at risk of or with early symptoms of AMD? A study published recently ...
(Date:6/23/2017)... ... ... Goodcents Deli Fresh Subs today announced the opening of a new restaurant ... Topeka, Kan. 66604 (near 21st and Gage). It is owned and operated by long-time ... in the Topeka and Bonner Springs, Kan. area. , “Goodcents has such a ...
(Date:6/23/2017)... ... June 23, 2017 , ... MD Now Urgent ... is MD Now’s 28th facility overall and marks the urgent care center's eighth location ... mile North of The Falls shopping mall. The new clinic offers a wide array ...
Breaking Medicine News(10 mins):
(Date:6/7/2017)... 7, 2017  Novavax, Inc., (Nasdaq: NVAX ) ... 2 trials of its RSV F protein recombinant nanoparticle vaccine ... have been published in the journal Vaccine ... in prior scientific conferences). The Company previously announced top ... is developing the RSV F Vaccine with the goal of ...
(Date:6/2/2017)... , June 2, 2017  NxStage Medical, Inc. (Nasdaq:  NXTM), a ... today announced new findings demonstrating positive biochemical outcomes related ... System One™. The data will be presented at the ... Madrid, Spain . The ... Home Dialysis Network in Europe ...
(Date:5/29/2017)... -- Cellect Biotechnology Ltd. (NASDAQ: APOP ; TASE: APOP), ... selection of stem cells, today provided a corporate update ... March 31 st , 2017. "We ... quarter of 2017," said Dr. Shai Yarkoni, Chief Executive ... of the first blood cancer patient in the recently ...
Breaking Medicine Technology: