Blows To The Head Lead To Vision Loss

Blows To The Head Lead To Vision Loss.


As more scrutiny focuses on the wound concussions can cause, scientists now report that even mild blows to the source might affect memory and thinking. In this latest study, special helmets were used on football and ice hockey players during their seasons of play. None of the players were diagnosed with a concussion during the think over period, but the momentous helmets recorded key data whenever the players received milder blows to the head website here. "The accelerometers in the helmets allowed us to deem and quantify the intensity and frequency of impacts," said chew over author Dr Tom McAllister.



And "We thought it might issue in some interesting insights". The researchers found that the extent of change in the brain's white matter was greater in those who performed worse than expected on tests of remembrance and learning. White matter transports messages between unique parts of the brain read full article. "This suggests that concussion is not the only thing we need to pay notice to," said McAllister, chairman of the department of psychiatry at the Indiana University School of Medicine.



So "These athletes didn't have a concussion diagnosis in the year we intentional them and there is a subsample of them who are perhaps more weak to impact. We need to learn more about how long these changes last and whether the changes are permanent". The about was published online Dec 11, 2003 in the journal Neurology. Concussions are meek traumatic brain injuries that occur from a sudden blow to the head or body.



Symptoms include headache, blurry ghost and difficulty sleeping or thinking clearly. Research on repetitive brain impacts not associated with diagnosed concussions is sparing and contradictory, the researchers said. McAllister, who conducted the experiment with while affiliated with Dartmouth College, compared 80 concussion-free varsity football and ice hockey players wearing specialized helmets to 79 athletes in noncontact sports.



He evaluated them before and after the period with intellect scans and learning and memory tests. A total of 20 percent of the contact-sport players and 11 percent of the noncontact athletes performed worse on a assay of verbal culture and memory at the end of the season, a decline expected in less than 7 percent of a normal population. Those performing worse exhibited more changes in the corpus callosum territory of the brain - a bundle of nerves connecting the sinistral and right sides of the brain - than athletes who scored as predicted.



Dr Howard Derman, co-director of the Methodist Concussion Center in Houston, said he wasn't surprised by the findings. He said blows to the administrator without a reported concussion might cause imagination damage that doesn't put out symptoms.



Derman said future research on this topic would be illuminating if, with specially equipped helmets, blood begin and pressure changes in the brain could be measured during repetitive head blows. "If you can verify that there are changes to the brain and there haven't been significant blows, it would be even more of a concern. We have to assume there is some cumulative effect, with multiple blows causing the problem. It's as though bending a piece of plastic once - nothing happens homepage here. But if you do it 40 times, you rupture the plastic".

tag : brain blows concussion changes players helmets athletes mcallister concussions

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ivankuleshov

Author:ivankuleshov
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