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group_4_presentation_3_-_concussions [2020/03/25 21:54] hunteh2 |
group_4_presentation_3_-_concussions [2020/03/25 23:48] baign [Second impact syndrome] |
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| ===== Second impact syndrome ===== | ===== Second impact syndrome ===== | ||
| - | Second impact syndrome (SIS) occurs when the brain swells rapidly after a person suffers a second concussion before symptoms from an earlier one has subsided. This second blow may occur minutes, days or weeks after an initial concussion, and even the mildest concussion can lead to SIS. The condition is often fatal, and almost everyone who is not killed is severely disabled. The cause of SIS is uncertain, but it is thought that the brain's arterioles lose their ability to regulate their diameter, and therefore lose control over cerebral blood flow, causing massive cerebral edema (Cantu, 2011). | + | Second Impact Syndrome (SIS) occurs when the brain swells rapidly after a person suffers a second concussion before symptoms from an earlier one has subsided. This second blow may occur minutes, days or weeks after an initial concussion, and even the mildest concussion can lead to SIS. The condition is often fatal, and almost everyone who is not killed is severely disabled. The cause of SIS is uncertain, but it is thought that the brain's arterioles lose their ability to regulate their diameter, and therefore lose control over cerebral blood flow, causing massive cerebral edema (Cantu, 2011). |
| ===== Post-concussion syndrome ===== | ===== Post-concussion syndrome ===== | ||
