Concussion. Acceleration limits causing concussion.
Identifieur interne : 004B52 ( Main/Exploration ); précédent : 004B51; suivant : 004B53Concussion. Acceleration limits causing concussion.
Auteurs : D. Parkinson [Canada] ; R M JellSource :
- Surgical neurology [ 0090-3019 ] ; 1988.
English descriptors
- KwdEn :
- MESH :
- adverse effects : Acceleration.
- etiology : Brain Concussion, Coma.
- physiopathology : Brain Concussion, Coma, Head.
- Animals, Disease Models, Animal, Gravitation, Rana pipiens, Terminology as Topic, Time Factors.
Abstract
Among the many features common to all species of the animal kingdom is the transient loss of function of the nervous system as the result of a jarring blow, a phenomenon known as concussion. Understanding of concussion has been hampered by the lack of a uniform definition, with many authors including cases with gross, irreversible changes. The phenomenon occurs only with a blow that significantly accelerates and thus is best defined as "a transient disturbance of neuronal function as a result of acceleration." There must be a threshold beneath which no loss of function occurs and a ceiling beyond which changes are not reversible. Experiments with nonanesthetized frogs revealed that at 33 g only the occasional frog would be stunned. From 50 to 230 g, consciousness was always lost but rapidly regained and retained, while beyond, the loss was not always reversible. The time of functional loss was increasingly proportional to acceleration.
PubMed: 3261046
Affiliations:
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Le document en format XML
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Parkinson</name><affiliation wicri:level="4"><nlm:affiliation>Department of Anatomy, University of Manitoba, Winnipeg, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Anatomy, University of Manitoba, Winnipeg</wicri:regionArea><orgName type="university">Université du Manitoba</orgName><placeName><settlement type="city">Winnipeg</settlement><region type="state">Manitoba</region></placeName></affiliation></author><author><name sortKey="Jell, R M" sort="Jell, R M" uniqKey="Jell R" first="R M" last="Jell">R M Jell</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="1988">1988</date><idno type="RBID">pubmed:3261046</idno><idno type="pmid">3261046</idno><idno type="wicri:Area/PubMed/Corpus">001C56</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">001C56</idno><idno type="wicri:Area/PubMed/Curation">001C56</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Curation">001C56</idno><idno type="wicri:Area/PubMed/Checkpoint">001C56</idno><idno type="wicri:explorRef" wicri:stream="Checkpoint" wicri:step="PubMed">001C56</idno><idno type="wicri:Area/Ncbi/Merge">002312</idno><idno type="wicri:Area/Ncbi/Curation">002312</idno><idno type="wicri:Area/Ncbi/Checkpoint">002312</idno><idno type="wicri:doubleKey">0090-3019:1988:Parkinson D:concussion:acceleration:limits</idno><idno type="wicri:Area/Main/Merge">005530</idno><idno type="wicri:Area/Main/Curation">004B52</idno><idno type="wicri:Area/Main/Exploration">004B52</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Concussion. Acceleration limits causing concussion.</title><author><name sortKey="Parkinson, D" sort="Parkinson, D" uniqKey="Parkinson D" first="D" last="Parkinson">D. Parkinson</name><affiliation wicri:level="4"><nlm:affiliation>Department of Anatomy, University of Manitoba, Winnipeg, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Anatomy, University of Manitoba, Winnipeg</wicri:regionArea><orgName type="university">Université du Manitoba</orgName><placeName><settlement type="city">Winnipeg</settlement><region type="state">Manitoba</region></placeName></affiliation></author><author><name sortKey="Jell, R M" sort="Jell, R M" uniqKey="Jell R" first="R M" last="Jell">R M Jell</name></author></analytic><series><title level="j">Surgical neurology</title><idno type="ISSN">0090-3019</idno><imprint><date when="1988" type="published">1988</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Acceleration (adverse effects)</term><term>Animals</term><term>Brain Concussion (etiology)</term><term>Brain Concussion (physiopathology)</term><term>Coma (etiology)</term><term>Coma (physiopathology)</term><term>Disease Models, Animal</term><term>Gravitation</term><term>Head (physiopathology)</term><term>Rana pipiens</term><term>Terminology as Topic</term><term>Time Factors</term></keywords><keywords scheme="MESH" qualifier="adverse effects" xml:lang="en"><term>Acceleration</term></keywords><keywords scheme="MESH" qualifier="etiology" xml:lang="en"><term>Brain Concussion</term><term>Coma</term></keywords><keywords scheme="MESH" qualifier="physiopathology" xml:lang="en"><term>Brain Concussion</term><term>Coma</term><term>Head</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Disease Models, Animal</term><term>Gravitation</term><term>Rana pipiens</term><term>Terminology as Topic</term><term>Time Factors</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Among the many features common to all species of the animal kingdom is the transient loss of function of the nervous system as the result of a jarring blow, a phenomenon known as concussion. Understanding of concussion has been hampered by the lack of a uniform definition, with many authors including cases with gross, irreversible changes. The phenomenon occurs only with a blow that significantly accelerates and thus is best defined as "a transient disturbance of neuronal function as a result of acceleration." There must be a threshold beneath which no loss of function occurs and a ceiling beyond which changes are not reversible. Experiments with nonanesthetized frogs revealed that at 33 g only the occasional frog would be stunned. From 50 to 230 g, consciousness was always lost but rapidly regained and retained, while beyond, the loss was not always reversible. The time of functional loss was increasingly proportional to acceleration.</div></front></TEI><affiliations><list><country><li>Canada</li></country><region><li>Manitoba</li></region><settlement><li>Winnipeg</li></settlement><orgName><li>Université du Manitoba</li></orgName></list><tree><noCountry><name sortKey="Jell, R M" sort="Jell, R M" uniqKey="Jell R" first="R M" last="Jell">R M Jell</name></noCountry><country name="Canada"><region name="Manitoba"><name sortKey="Parkinson, D" sort="Parkinson, D" uniqKey="Parkinson D" first="D" last="Parkinson">D. Parkinson</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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