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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.

  • 22 percent of athletes in contact sports had lower results on learning and memory skills tests after their season.
  • 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.

Competitive Classes

May 7, 2013

After the classifications and divisions for MHSAA tournaments in 2013-14 were posted on mhsaa.com last month, there were more questions and comments than in previous years.

Some of this results from electronic media – how quickly our information gets distributed far and wide, and how easy it is for people to email their opinions.  This isn’t bad.

But we were able to discern in the feedback that there is poor public understanding of school enrollment trends in Michigan.  For example, many people objected that the spread between the largest and smallest schools in the classifications and divisions has grown too large.

In fact, taking the long view, the difference between the largest and smallest schools has been shrinking:

  • In Class D, the difference between the largest and smallest school has trended downward over the past 25 years, and will be approximately 20 percent smaller for 2013-14 than in 1989 (to 189 from 247).
  • The same is true in Class C, although less dramatically (to 221 from 259).
  • The same is true in Classes B and A, although less consistently (from 496 to 464 in Class B; and from 2,111 to 1,888 in Class A).

If there is need for more than four classes in basketball or girls volleyball, or for more than four “equal divisions” in most other sports, it is not because of the reason most often cited.  That reason – that the enrollment spread is growing too large – is not supported by the facts.