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publicado em 04/01/2012 às 14h30:00
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Ecstasy alters perception and visual acuity of the user during 24 hours

Changes in the physiology of the retina caused by the use of a single dose of the drug no longer existed at the end of 7 days of study

 
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In a study published in PLoS One, scientists from the Faculty of Medicine, University of Coimbra, Portugal, reported that a single dose of ecstasy, psychoactive drug amphetamine group, mainly composed of NDMA substance, changes the perception and visual acuity user for at least 24 hours.

Results showed that changes in the physiology of the retina caused by drug use no longer existed at the end of 7 days of study, but researchers warn of effects after prolonged use of a greater number of doses for longer.

According to the researchers, the substance that causes euphoria and excitement, causes toxicity in the brain, but science did not know whether it affected the vision, especially retinal function, taking into account that this membrane of the eyeball is part of the central nervous system, that is, an appendage of the brain.

To check whether and how the substance caused changes in the retina, the team led by Francis Ambrose, tested the effects of administering a single dose, but high, the drug in rats.

The researchers used a type of EEG for the brain, called the electroretinogram, which has the function to evaluate the retinal response to light stimuli and analyze their physiology. They found changes suggesting that the photoreceptor cells of the retina responsible for receiving and training, were affected, as its function.

According to Ambrose, the study is important to understand what effect the continued consumption of ecstasy can cause retinal physiology, but notes that despite the end of seven days there had been no signs of drug-induced changes, the study tested only one single dose and long-term effects may persist.

The team now hopes to see the effects derived from continuing use of ecstasy in the retina of animals according to two paradigms: a young user who will spend a week's holiday in the group and makes daily use of drugs, young consumers and end-of-week.

Source: Isaude.net
   Palavras-chave:   Ecstasy    Retina    Visual acuity    Drug    NDMA    University of Coimbra    Francis Ambrose   
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