NFL concussions more common on colder game days
The study also found ankle injuries were more common at colder temperatures
Concussion
NFL demands retraction of New York Times story on concussions
League makes veiled threat of legal action over story that called concussion research flawed; paper stands by report
NFL says concussions were way up in 2015
League says it will study what might have caused head injuries to rise by 58 percent this season
New technology offers on-field head injury reporting
Experts hope system will help get student athletes the speedy treatment they need after a head injury or concussion
Could helmet-free football practice prevent concussions?
Experts say the approach may encourage football players to avoid using their heads as weapons
Here's to your health: Medical news that mattered in 2015
New mammogram advice, vaccine controversies, and a little pink pill were among the top health stories of the year
Cheerleading injuries less common, more severe
Supporters say that when cheerleading is not considered an official sport, there can be dangerous consequences
Doctor: "Clear signs of a concussion" after Rams QB hit
NFL to hold mandatory conference call with athletic trainers after quarterback Case Keenum remained in game despite suffering concussion
NFL investigating why QB kept playing after concussion
St. Louis Rams quarterback Case Keenum remained in the game after a hard hit slammed his head into the ground
Case Keenum concussion challenges NFL protocol
Rams quarterback was obviously woozy after his head slammed the ground, but he never missed a play, leading to many questions for NFL
Will a ban on headers keep young soccer players safe?
Limits are set for older children, too, after U.S. Soccer Federation faced a safety lawsuit from some parents
Blood test may help diagnose concussions in kids
Researchers say the simple test could one day help coaches and parents make decisions about children's care on the field
New guidelines for youth football follow injuries, deaths
The American Academy of Pediatrics' recommendations come as a Tennessee high school football player is in critical condition and a high school in Chicago mourns the death of a student athlete
Chris Nowinski: The NFL needs to "evolve" to protect players
The co-founder of the Sports Legacy Institute, which focuses on traumatic brain injury research, talks to CBS News about how football rules need to be changed to address concussion and chronic traumatic encephalopathy issues
Concussions linked to Alzheimer's disease plaques
Daily health headlines: Concussions may trigger another neurological disease, plus more top stories
James Brown: Fear Favre describes felt by other former players
Brett Favre revealed this week that he suffers from memory loss, an admission that comes after the NFL's recent $775 million concussion settlement
Favre: Memory loss "a little bit scary to me"
The only quarterback to have won three consecutive NFL MVP awards said he suffers from memory loss and believes it may be the result of concussions
Brain disease found in 87 deceased NFL players
Researchers say data provides more evidence of the link between head trauma in football and long-term brain deterioration
"Concussion" director says no compromises made for the NFL
A day after its trailer debuted online, the Will Smith football head-trauma film is already sparking controversy
Memory loss takes toll on former NFL players
Study looks at the long-term damage from concussions in professional football
Kids' concussions cause problems at school
Students often have a hard time with academics after a head injury, researchers say
Judge OKs $1 billion deal over NFL concussions lawsuit
Awards for players who suffer from Alzheimer's disease or moderate dementia average out to $190,000 per person
Brain scans may spot concussion-related condition
New technique may help diagnose football players and others suffering from lingering damage
Chris Borland on retirement: "The best decision for me"
The star NFL rookie linebacker answers critics on "Face the Nation" who accused him of making a cash grab by playing just one year
Why NFL rookie Chris Borland decided to retire after one season
The 24-year-old linebacker's announcement is bringing the risks of long-term head trauma back into the spotlight
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