Experts react to new findings on CTE in former NFL players

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A new survey from Boston University estimating that astir 75% of NFL players who died implicit a 15-year play had signs of CTE successful their brains is raising concern, and experts accidental it demonstrates the request to cod much information connected the condition.

CTE, oregon chronic traumatic encephalopathy, is simply a degenerative encephalon disease recovered successful radical who person suffered repeated blows to the head. It tin lone beryllium definitively diagnosed aft death. It has besides been recovered successful the brains of other athletes, archetypal responders and subject members, but is seldom seen successful the wide population.

The Boston University probe builds connected information published successful The British Medical Journal successful August. That information estimated that anyplace from 25% to 98% of ex-NFL players who died betwixt 2016 and 2021 had CTE. The wide estimation reflected uncertainty astir however typical encephalon donors studied were of the wide NFL population, since encephalon donors are much apt to person symptoms believed to beryllium related to CTE.

The Boston researchers looked for signs of the information successful brains donated by 387 players who died betwixt 2008 and 2023 — a subset of the 2,362 erstwhile NFL players who died during that period. Ninety-four percent of the donors had immoderate signifier of CTE. The researchers estimated that erstwhile NFL players with cognitive symptoms were 5 times much apt to person their brains donated to subject than others, and estimated from determination that 74.5% of players had immoderate signifier of CTE. The probe is published successful JAMA Network Open.

CBS News main aesculapian analogous Dr. Jon LaPook cautioned that that fig whitethorn beryllium an overestimate. He noted that the probe looked astatine however galore erstwhile players had signs of CTE successful their encephalon — not however galore showed existent symptoms of CTE.

Dr. Kristen Dams-O'Connor, manager of the Brain Injury Research Center astatine Mount Sinai, said the results of the insubstantial "cannot and should not beryllium interpreted arsenic being typical of existent surviving athletes." She pointed retired that of those whose brains were studied, "many ... ended their careers agelong ago." In caller years, the NFL has implemented regularisation changes that are designed to trim concussions connected the field, and introduced much protective equipment, including Guardian Caps.

"This should construe to little CTE hazard successful caller generations of players, compared to those who played decades ago," Dams-O'Connor said.

The NFL told CBS News successful a connection that it "continuously strives to marque the crippled of shot safer, including by implementing strategies to trim concussions and caput impacts."

Dams-O'Connor said that portion Boston University utilized "strong methods" to set for enactment bias successful the data, determination are inactive different gaps, specified arsenic accounting for the astir 20,000 NFL players who could person died during the study's 15-year timeframe but did not. She besides said the results could not beryllium applied to the "vast bulk of radical who played younker football" oregon different non-professional interaction sports.

"It's a adjuvant survey successful trying to look astatine the bigger picture, recognizing that those who donate their encephalon are much apt to person cognitive symptoms, and often are much apt to person had changes," said Dr. Jeremy Tanner, adjunct prof of neurology astatine The Glenn Biggs Institute for Alzheimer's and Neurological Diseases astatine the UT San Antonio Health Science Center. "Even taking that enactment bias into account, erstwhile you look much broadly, it's astatine a minimum 20 to 25%, which is eye-opening and truly shows the request to some beforehand the research."

Searching for CTE successful its "silent phase"

Dr. Jay Alberts, manager of the Cleveland Clinic Concussion Center, said the information shows the request to look for aboriginal informing signs of CTE.

"We often deliberation astir neurological disease, including CTE, arsenic having a soundless phase. These things are changing, and we can't observe them," Alberts said. "But I don't deliberation it's silent, per se. I deliberation what we request to bash is perceive much cautiously and usage amended measurements to recognize what those changes are."

Those measurements could see studying a person's "instrumental activities of regular living," oregon IADLs, Alberts said. That includes skills similar driving a car oregon balancing a checkbook, wherever a idiosyncratic indispensable usage some cognitive relation and centrifugal relation simultaneously. In patients with Alzheimer's oregon Parkinson's disease, IADLs commencement to alteration betwixt 5 and 7 years earlier a diagnosis is made. He said CTE whitethorn beryllium similar.

"Those types of activities are truly insights into encephalon function, and I would reason those are things that would assistance america to perceive much effectively," helium said.

Finding different signs of CTE

Understanding however a person's encephalon relation whitethorn alteration during the aboriginal stages of CTE could marque it easier to diagnose, Alberts said. That could besides pb to interventions that mightiness "slow it oregon adjacent perchance reverse it."

Alberts and Tanner besides highlighted probe focused connected determining if determination are biomarker changes that could beryllium connected to CTE. Ongoing studies, including one that has a survey tract astatine UT Health San Antonio, travel existent oregon erstwhile players passim their beingness to spot if determination are immoderate abnormal changes to the assemblage oregon encephalon implicit the years. Alberts called for adjacent much semipermanent research, and Tanner said that specified studies tin payment much than conscionable erstwhile NFL players.

"This has truly been a accelerated country of technological advancement implicit the past 10 to 20 years, and has led to breakthroughs successful the caller therapies for Alzheimer's disease, and hopefully (will) for galore different neurodegenerative diseases similar CTE, Lewy assemblage disease, and others successful the years to come," Tanner said.

"Hopefully we tin make tools and biomarkers to observe these encephalon changes during life, which volition alteration america to survey these diseases during life, and successful the champion case, larn ways to amended forestall oregon dainty these diseases."

Edited by Paula Cohen

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