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Second-impact syndrome (SIS) occurs when the brain swells rapidly, and catastrophically, after a person has a second concussion before symptoms from an earlier one have subsided. This second blow may occur minutes, days, or weeks after an initial concussion, [ 1 ] and even the mildest grade of concussion can lead to second impact syndrome. [ 2 ]
Second-impact syndrome is a result of a second head injury before the brain has adequate time to heal between concussions. [3] It typically give signs and symptoms of a post-concussion syndrome (visual, motor, or sensory abnormalities and difficulties with cognitive processes).
Physiological and psychological factors present before, during, and after the injury are all thought to be involved in the development of PCS. [13] [needs update] Some experts believe post-concussion symptoms are caused by structural damage to the brain or disruption of neurotransmitter systems, resulting from the impact that caused the concussion.
Miami Dolphins quarterback Tua Tagovailoa (1) suffers a concussion after a play against the Buffalo Bills in the second half of their NFL game at Hard Rock Stadium on Thursday, Sept. 12, 2024, in ...
When it entered into the second half, the B pattern, the first time people laughed, the whole atmosphere in the theatre changed. From there, all of a sudden, it really felt very at home, very ...
Twenty-one athletes had a history of concussion and 22 did not. Concussed athletes had their last injury at least nine months before the MRI scans, and half were 26 months or more post-concussion.
The condition may develop in people who receive a second blow days or weeks after an initial concussion before its symptoms have gone away. [27] No one is certain of the cause of this often fatal complication, but it is commonly thought that the swelling occurs because the brain's arterioles lose the ability to regulate their diameter, causing ...
Figure Skater Amber Glenn Suffered 'Severe' Concussion 1 Year Before Her Historic ISU Grand Prix Final Win. Rachel Flynn. December 29, 2024 at 5:00 AM. International Skating Union via Getty.