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Delayed onset of symptoms may still be serious and require a medical assessment. [24] Up to one-third of people with concussion experience longer or persisting concussion symptoms, also known as post concussion syndrome or persisting symptoms after concussion, which is defined as concussion symptoms lasting for 4 weeks or longer in children and ...
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 pediatric concussion can lead to an immediate or delayed onset of symptoms. [12] Immediate onset of symptoms includes physical impacts, such as dizziness, headache, anterograde or retrograde amnesia, loss of consciousness, vomiting and more. [1] Delayed onset of symptoms may occur a few hours or days after the injury.
Fatigue is the most frequently affirmed symptom of PCS included on the questionnaire, while double vision is the least affirmed. [7] Some other neuropsychological tests do not include fatigue as a symptom of PCS, giving the Rivermead Post-Concussion Symptoms Questionnaire an advantage in an "accurate" assessment of the condition.
Concussion grading systems are sets of criteria used in sports medicine to determine the severity, or grade, of a concussion, the mildest form of traumatic brain injury. At least 16 such systems exist, [ 1 ] and there is little agreement among professionals about which is the best to use. [ 2 ]
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]