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BEIJING, Nov. 30 (Xinhuanet) -- Heading football frequently may cause brain damage leading to subtle but serious declines in thinking and coordination1 skills, a new study suggested as quoted by media reports Wednesday.
Researchers used an advanced MRI (Magnetic Resonance2 Imaging) technique to analyze3 changes in brain white matter of 32 adult amateur soccer players who head balls 436 times a year on average.
The study found players who head football quite frequently -- with 1,000 or more a year -- showed abnormalities similar to traumatic brain injuries suffered in car accidents.
"This is the first study to look at the effects of heading on the brain using sophisticated diffusion4 tensor imaging," said Dr. Michael Lipton, a leading researcher and associate director of the Gruss Magnetic Resonance Research Center at the Albert Einstein College of Medicine in New York City.
"We found the real implication for players isn't from hitting headers once in a while, but repetitively, which can lead to degeneration of brain cells," he added.
The researchers compared neurological images of study participants, whose average age was 31, and found those with the highest volume of headers had abnormalities in five areas of the brain, responsible for attention, memory, physical mobility5 and high-level visual functions.
The findings come in the wake of mixed reports on the so-called "cognitive6" consequences of frequently heading soccer balls at practice.
Dr. Chris Koutures, a pediatrician and sports medicine specialist in Anaheim Hills, California, said the retrospective imaging study was fascinating, but needs more data to effectively determine safe header limits, especially for younger players.
Dr. Lipton agreed neuropsychological damage from headers would be hard for a coach or physician to notice since cognitive problems develop gradually, and even players might not be aware of mild memory loss.
"We can't tell an individual today not to be heading a ball, but caution is a good thing," Lipton said. "We need more research for definitive7 answers and we have the advanced imaging tools to do it."
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1 coordination | |
n.协调,协作 | |
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2 resonance | |
n.洪亮;共鸣;共振 | |
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3 analyze | |
vt.分析,解析 (=analyse) | |
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4 diffusion | |
n.流布;普及;散漫 | |
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5 mobility | |
n.可动性,变动性,情感不定 | |
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6 cognitive | |
adj.认知的,认识的,有感知的 | |
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7 definitive | |
adj.确切的,权威性的;最后的,决定性的 | |
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