Head Trauma and Learning
November 23, 2012
Researchers at my alma mater have joined their voices to the growing chorus of concerns about the effects of repeated blows to the head.
A study of the cognitive effects of head impacts on members of Dartmouth College football, hockey, track, crew and Nordic ski teams compared before and after season results on learning and memory skills. Participating athletes also came from Brown and Virginia Tech.
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22 percent of athletes in contact sports had lower results on learning and memory skills tests after their season.
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Only 4 percent of athletes in non-contact sports posted lower test results.
The researchers caution that it is unknown at this point how long these negative effects may last, but they also note there is some correlation between test results and how hard the athletes were hitting heads.
This adds to the mounting evidence that rules writers, program sponsors, coaches and officials must look for and implement a variety of measures to reduce the frequency and severity of head impacts in both practice and competition in all sports.
Swimming Lessons
January 19, 2016
I found a place between Christmas and New Year’s Day that was out of Internet reach. For four days and three nights I spent most of the days in the water looking downward into an ocean of coral canyons surrounded by swarms of colorful fish, and much of the nights on the open deck of a catamaran looking up at a nearly full moon moving between stars and swirling clouds. Here is some of what I learned from experiences, rather than from Google, on those days.
First, flying fish really do fly, on average, about the length of a football field.
Second, sea urchins have an edible element, if the spiny critters are smoked in a fire of coconuts and palm fronds and then soaked in saltwater, and if you are either desperately marooned on some remote island or just trying to be nice to the local residents you just met who believe the urchin's slimy, salty core is a delicacy that hospitality requires be shared and graciousness demands be appreciated.
And, more relevant to the work we share that I tried unsuccessfully to tune out for these four days, I learned ...
What you see in the ocean is distorted until you put on your goggles and get beneath the surface of the water. Getting beneath the surface of things is necessary for clear vision.
What you see first is likely to be the flashy fish, while the greater significance is observed more slowly in what appears to be their inanimate habitats, which turn out to be alive with movement if you wait and watch for it. Patience is necessary for clear vision.
The wavy six-inch line of purple coral was really the lips of a large clam that actually separate a fraction of an inch every minute or so to take in the nourishment of the sea. The brown stump below it was really a sea cucumber that actually moves an inch or two a day to vacuum the ocean floor. I saw none of this until I got beneath the surface, and waited.