Ok, lets replace skateboarding with other sports. Here’s a little info on the subject of sports and unnatural brain function. I am sure that sports would fail your two condition Locke. Don’t mind the numbers; they’re for the separation of the sources.
1 “A blow or jolt to the head can disrupt the normal function of the brain. This type of brain injury is often termed a concussion or "closed head injury" because the skull is not pierced by an object. Each year, 40,000 high school football players nationwide suffer concussions, which are usually considered mild traumatic brain injuries (MTBI), but still require medical attention.
Many other sports and recreational activities, including wrestling, hockey, soccer (from head collisions), snowboarding and in-line skating, can also result in concussions. Even whiplash can cause a concussion. Altogether, about 300,000 traumatic brain injuries occur each year in sports and recreation in the United States.”
Sports Concussions a Growing Concern
2
Concussions
Symptoms of a concussion may include:
"seeing stars" and feeling dazed, dizzy, or lightheaded
memory loss, such as trouble remembering things that happened right before and after the injury
nausea or vomiting
headaches
blurred vision and sensitivity to light
slurred speech or saying things that don't make sense
difficulty concentrating, thinking, or making decisions
difficulty with coordination or balance (such as being unable to catch a ball or other easy tasks)
feeling anxious or irritable for no apparent reason
feeling overly tired
3 The study was conducted by the University of North Carolina’s Center for the Study of Retired Athletes and based on a general health survey of 2,552 retired N.F.L. players. It corroborates other findings regarding brain trauma and later-life depression in other subsets of the general population, but runs counter to longtime assertions by the N.F.L. that concussions in football have no long-term effects.
4 ( A doctor who studied pro wrestler Chris Benoit's brain says the brain damage suffered during his years in the ring could help explain why he killed his wife, his son and himself )
5 ( Nowinski didn't know he had suffered a concussion. He didn't know that he shouldn't have been wrestling immediately afterward, and he didn't know that this was probably the sixth concussion of his athletic career. There was a lot Nowinski didn't know about concussions.
Hard hits were nothing new to Nowinski, 28, a tree of a man who had played sports since childhood. Blows to the head punctuated many of the games and matches in his career, he said. Sometimes he blacked out.
"The sky would change colors, or I would see stars, and get really dizzy, and I would just collect myself on the field or in the ring, and continue going, because that's what I thought I was supposed to do," he told CNN in a telephone interview. "I didn't realize that it was a serious brain injury." )