concussion

Period of nervous-function impairment that results from relatively mild brain injury, often with no bleeding in the cerebral cortex. It causes brief unconsciousness, followed by mental confusion and physical difficulties. These effects usually clear up within hours, but in some cases disturbance of consciousness continues, and there may be residual symptoms. Some level of amnesia often accompanies concussion. Recovery from concussion is almost always complete unless more serious injury, such as skull fracture, accompanies it.

concussion

a jarring of the brain, caused by a blow or a fall, usually resulting in loss of consciousness

concussion [kən′kəsh·ən]

(engineering)

Shock waves in the air caused by an explosion underground or at the surface or by a heavy blow directly to the ground surface during excavation, quarrying, or blasting operations.

(medicine)

A state of shock following traumatic injury, especially cerebral trauma, in which there is temporary functional impairment without physical evidence of damage to impaired tissues.

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No references found	Rarely, and most commonly among adolescent boys, a second concussion can result in a condition called Second Impact Syndrome, which can cause severe brain injury and sometimes death, said Dr. Consequences of repeatblows can be severe for youngsters by The Register-Guard (Eugene, OR) Researchers have identified a serious series of brain injury events they call second impact syndrome (SIS). SECOND IMPACT SYNDROME: Sports Confront Consequences of Concussions by TYLER, JEFFREY H.; NELSON, MICHAEL E. / USA Today (Magazine) He determined that Schultz' brain injury was a classic case of Second Impact Syndrome (SIS), a rare, usually fatal condition which can occur when a second concussion is sustained before a person has healed from a first. High School Football Player Who Sustained Catastrophic Brain Injury ... by Business Wire	second category second chamber second class Second Classical Revival style second coat Second Coming Second Conference of the Russian Social Democratic Labor Party Second Congress of Soviets of the Union of Soviet Socialist Republics, Second Congress of the Russian Social Democratic Labor Party second countable topological space second crop second curvature second derivative second detector Second Empire Second Empire architecture Second Empire style in the United States second fiddle second fixings Second Front second generation second generation computer second generation language Second Growth second hand second impact syndrome Second International second law of motion second law of thermodynamics second level cache Second Life second mean-value theorem second messenger Second messengers second mining second moment of area second normal form Second Period Colonial architecture second pilot Second Pointed style Second Promulgation of Serfdom second quadrant Second Quantization second radiation constant Second Renaissance Second Republic Second Revolution Second Serbian Uprising of 1815 Second Shepherds' Play Second Signaling System Second Sound	second hand second hand second hand Second Hand Building Centre Second Hand Modellbahn Versand Second hand smoke Second hand smoke Second hand smoke Second hand smoke Second Hand Smoke (album) Second hand smoking Second hand smoking Second hand smoking Second hand store second hands second hands Second Harmonic Distortion Second harmonic generation Second Harmonic Generation Microscopy Second Harvest Food Bank Second Harvest Food Bank of Metrolina Second Harvest Heartland Second Heart second heart sound Second Heartbeat Wave Second Highest Level of Division I College Athletics Second home Second Home Market Index Second Iceland Krona Second Iceland Krona second impact syndrome Second Imperial Geothermal Company Second in Command Second In, First Out Second In, Second Out Second inaugural address Second Indochina War Second Indochinese War Second Indochinese War Second Indochinese War Second Infantry Division Second Information on Technology in Education Study Second Injury Board Second Institute of Oceanography Second Intention second intentions Second Intermediate Period Second Internal Transcribed Spacer Second International Second International Second International (political) Second International (political) Second International (politics) Second International (politics) Second International Adult Literacy Survey Second International Conference on Climate Impacts Assessment Second International Conference on Oceanic Linguistics Second International Congress on Tools for Teaching Logic Second International Symposium on Electronic Art Second Internationale Second Internationale

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Rarely, and most commonly among adolescent boys, a second concussion can result in a condition called Second Impact Syndrome, which can cause severe brain injury and sometimes death, said Dr.

Consequences of repeatblows can be severe for youngsters by The Register-Guard (Eugene, OR)

Researchers have identified a serious series of brain injury events they call second impact syndrome (SIS).

SECOND IMPACT SYNDROME: Sports Confront Consequences of Concussions by TYLER, JEFFREY H.; NELSON, MICHAEL E. / USA Today (Magazine)

He determined that Schultz' brain injury was a classic case of Second Impact Syndrome (SIS), a rare, usually fatal condition which can occur when a second concussion is sustained before a person has healed from a first.

High School Football Player Who Sustained Catastrophic Brain Injury ... by Business Wire

second category

second chamber

second class

Second Classical Revival style

second coat

Second Coming

Second Conference of the Russian Social Democratic Labor Party

Second Congress of Soviets of the Union of Soviet Socialist Republics,

Second Congress of the Russian Social Democratic Labor Party

second countable topological space

second crop