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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]
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. [medical citation needed] Others believe that post-concussion symptoms are related to common psychological factors. Most common symptoms like headache ...
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.
A concussion is defined as a "complex pathophysiological process affecting the brain, induced by biomechanical forces". [1] A concussion should be suspected in any person who falls or has a hit to their face or their body and has a visible sign/clue that they may have a concussion or experiences any symptoms of concussion. [2]
“Black eye, orbital bone, passed out. Bad, bad, bad stuff,” Glenn recalled of the 2020 incident. Glenn is positive she endured other concussions as a young skater.
Four symptoms are considered no-gos, meaning that players who exhibit them are considered to have suffered a concussion and may not return to the game: Loss of consciousness, confusion, amnesia ...
Late symptoms can occur days to weeks after the initial injury, although headaches and dizziness can persist well into the "late stage" as well. [7] RPQ-3 symptoms are regarded as the more "physical" symptoms, whereas the RPQ-13 set of symptoms are considered to have a more significant impact on psychic and social function.
Often, patients can only recognize their prodrome symptoms when they get to the pain phase and look back, Singh says. During a prodrome period, the Mayo Clinic and American Migraine Foundation say ...