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A concussion, also known as a mild traumatic brain injury (mTBI), is a head injury that temporarily affects brain functioning. [8] Symptoms may include headache, dizziness, difficulty with thinking and concentration, sleep disturbances, mood changes, a brief period of memory loss, brief loss of consciousness; problems with balance; nausea; blurred vision; and mood changes.
The NFL's concussion protocols have evolved over the years, and the hit to Tua Tagovailoa on Thursday put the league's rules back in the spotlight.
If the player is diagnosed with a concussion, they are prohibited from re-entering the game or practice that day. According to the league's protocol, signs of a concussion include: loss of consciousness, lack of balance, holding head after contact, absentmindedness, lethargy, confusion or a visible facial injury in combination with any of the ...
[29] [30] In 2000, researchers from the Sports Medicine Research Laboratory at the University of North Carolina at Chapel Hill analyzed 17,549 players from 242 different schools. 888 (5.1%) of the players analyzed have at least one concussion a season, and 131 (14.7%) of them have had another concussion the year later.
The underlying mechanism involves the nervous system slowing the heart rate and dilating blood vessels, resulting in low blood pressure and thus not enough blood flow to the brain. [2] Diagnosis is based on the symptoms after ruling out other possible causes. [3] Recovery from a reflex syncope episode happens without specific treatment. [2]
The majority of symptoms are largely gone in about half of people with concussion one month after the injury, and about two thirds of people with minor head trauma are nearly symptom-free within three months. Persistent, often severe headaches are the longest lingering symptom in most cases and are the most likely symptom to never fully resolve ...