concussion


concussion
concussional, concussant /keuhn kus"euhnt/, adj.concussive, adj.
/keuhn kush"euhn/, n.
1. Pathol. injury to the brain or spinal cord due to jarring from a blow, fall, or the like.
2. shock caused by the impact of a collision, blow, etc.
3. the act of violently shaking or jarring.
[1350-1400; ME < L concussion- (s. of concussio) a shaking. See CONCUSS, -ION]

* * *

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.

* * *

      a temporary loss of brain function resulting from a relatively mild injury to the brain, not necessarily associated with unconsciousness. Those with concussions may not remember what happened immediately before or after their injury. Symptoms of a concussion include slurred speech, confusion, impaired muscle coordination, headache, dizziness, and nausea. Professional medical care should be sought to rule out the possibility of bleeding or swelling of the brain.

      Recovery from an uncomplicated concussion is almost always complete; however, sustaining multiple concussions or a moderate or severe concussion has been associated with long-lasting effects on the brain. Studies of retired athletes who sustained concussions in early adulthood have linked these injuries to reduced memory performance and bradykinesia (slowness of movement) in late life. Furthermore, there is some evidence indicating that severe concussion may be associated with the eventual onset of mild cognitive impairment and dementia.

* * *


Universalium. 2010.

Synonyms:

Look at other dictionaries:

  • Concussion — Classification and external resources Acceleration (g forces) can exert rotational forces in the brain, especially the midbrain and diencephalon. ICD 10 …   Wikipedia

  • concussion — [ kɔ̃kysjɔ̃ ] n. f. • 1539; « commotion, secousse » 1440; lat. concussio, de concutere « frapper » ♦ Dr. et didact. Perception illicite par un agent public de sommes qu il sait ne pas être dues. ⇒ exaction , malversation, péculat. Fonctionnaire… …   Encyclopédie Universelle

  • Concussion — Con*cus sion, n. [L. concussio, fr. concutere, concussum, to shake violenty; con + quatere to shake. See {Cashier}, {Quash}.] 1. A shaking or agitation; a shock; caused by the collision of two bodies. [1913 Webster] It is believed that great… …   The Collaborative International Dictionary of English

  • concussion — CONCUSSION. s. f. Vexation, action par laquelle un Magistrat, un Officier public exige au delà de ce qui lui est dû. Horrible, manifeste concussion. Il est accusé, il est convaincu de concussion. Il a commis, il a sait d horribles, d étranges… …   Dictionnaire de l'Académie Française 1798

  • concussion — CONCUSSION. s. f. v. Vexation, Se dit d un Magistrat, ou Officier public, ou de quelque particulier sans authorité, qui leve sur le peuple des deniers qui ne sont pas dûs, ou contre les formes, & qui les oblige à des travaux &c. Horrible,… …   Dictionnaire de l'Académie française

  • Concussion — (Concussio, Erpressung), das Verbrechen der Erzwingung eines rechtswidrigen Vermögensvortheiles durch thätliche Gewalt, durch gefährliche Drohung mit Tödtung od. schwerer Körperverletzung, mit gerichtlicher Anzeige od. anderen Schreckmitteln. Die …   Pierer's Universal-Lexikon

  • concussion — index collision (accident) Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • concussion — c.1400, from L. concussionem (nom. concussio) a shaking, noun of action from pp. stem of concutere shake violently, from com together (see COM (Cf. com )) + quatere to shake (see QUASH (Cf. quash)). Modern brain injury sense is from 1540s …   Etymology dictionary

  • concussion — shock, percussion, *impact, impingement, collision, clash, jar, jolt Analogous words: beating, pounding, buffeting (see BEAT vb): striking, smiting, swatting, slapping (see STRIKE vb) …   New Dictionary of Synonyms

  • concussion — [n] collision, shaking blast, blow, buffeting, bump, clash, clout, crack, crash, hit, impact, injury, jar, jarring, jolt, jolting, jounce, pounding, punch, shock, trauma; concept 189 …   New thesaurus

  • concussion — Concussion, Il est accusé de concussions et deniers mal prins par luy durant le temps de son magistrat, Repetundarum, vel de repetundis pecuniis a prouincialibus accusatur. Il avoit fait plusieurs concussions et prins argent et dons corrompables …   Thresor de la langue françoyse