Etiology and Pathomechanism病因与病机学说.pptx

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1、EtiologyandPathomechanism病因与病机学说1TCMholdsthatthereisnosyndromewithoutcause.Anysyndromeisadisharmoniousreflectionofthebodyundertheinfluenceandactionofsomefactors.EtiologyinTCMnotonlystudiesthenatureandpathogeniccharactersofpathogenicfactors,butalsoprobesintoclinicalmanifestationstheycause.Etiolog

2、y2Thecausesaredividedintofourcategoriesofexogenouspathogens外感病因,endogenouspathogens内伤病因,pathogensfrompathologicalproducts病理产物andmiscellaneouspathogensaccordingtothewaysofattackandthedevelopmentofdisease.其他病因Etiology3Thepathogensthatinvadethehumanbodytocausediseasefromtheoutsideviathesurfaceofthe

3、body,or/andmouthandnose.Theyincludesixclimaticpathogensandpestilentpathogens.ExogenousPathogens4Theyareacollectivetermusedforsixkindsofexogenouspathogensofwind风,cold寒,summer-heat暑,dampness湿,dryness燥andfire火.Theyarenormalclimaticchangesinnatureanddonotcausedisease.Whentheclimaticchangeissharporth

4、eresistanceofthebodybecomesweak,thesixclimaticfactorswillbecomepathogens,causingthebodytofallill.Theyarealsorefertoasthe“sixevils六淫”.TheSixClimaticPathogens（六气）5Oftenconnectedwithseasonsandenvironmentalconditions.Wind-diseaseoftenoccursinspring;Summer-heatinsummer;Dampness-diseaseinlatersummer;D

5、ryness-diseaseinautumnandcold-diseaseinwinter.Prolongedstayinadampenvironmentmaycontributetotheinvasionofdampness;ahigh-temperaturecontributestotheinvasionofdrynessheatorfire.Pathogeniccharactersofthe6climaticpathogens6Eachofthesixclimaticpathogensmaycausediseasealoneorinmixturewithanother.Egwin

6、dandcoldcaninvadethebodyandcauseacommoncold,dampnessandheatcancausediarrhea,coldanddampnesscancause“Bi痹”(arthralgia)syndrome。Pathogeniccharactersofthe6climaticpathogens7Inthepathologicalprocess,thenatureofasyndromecausedbythesixclimaticpathogensmaychangeundercertainconditions.Egcoldmayturnintohe

7、atafterenteringtheinteriorofthebody.Accumulatedsummer-heat–dampnessinthebodymaychangeintodrynesstoaffectthebody’slevelofyin.Pathogeniccharactersofthe6climaticpathogens8Thesixclimaticpathogensusuallyinvadethebodythroughthebod