国际康复论坛脑力锻炼可以预防失用肌肉

Canmentalexercisepreventunusedmusclesfromgettingweaker?

Patientswhoareunabletousetheirmusclesforextendedperiodsoftime-suchasthosewhohavesufferedastroke-oftenexperienceweakenedmusclesfromlackofuse.Butnow,anewstudysuggeststhatperformingmentalimageryexercisescanpreventtheunusedmusclesfromgettingweaker.

Patientsundergoingneurorehabilitation-suchasthosewhohaveexperiencedastroke-maybenefitfrommentalimageryexercisetopreventweaknessinunusedmuscles,accordingtothelateststudy.

Theresearchers,fromtheOhioUniversityHeritageCollegeofOsteopathicMedicine,publishtheirfindingsintheJournalofNeurophysiology.

Usingmentalimageryforphysicalperformanceisnotnecessarilyanewconcept;professionalathletesoftenusesuchtechniquestoimprovetheirathleticperformance.However,theteamsaystheirsisthefirststudytodemonstratethatimagerycanstoporslowmusclestrengthlossafterlongperiodsofdisuse.

Thefindingshaveimplicationsforindividualsundergoingneurorehabilitationandprovideamajorbreakthroughforscientists,inthattheyoffernewevidenceabouthowthenervoussystemaffectsmuscleweakness.

Thoughmedicalscientistshaveknownthatthebrainscortexcoordinatesandcontrolsmusclemovement,untilnow,thelinkbetweenthecortexandmusclestrengthhasbeenupfordebate.

Wewantedtoteaseouttheunderlyingphysiologybetweenthenervoussystemandmusclestobetterunderstandthebrainsroleinmuscleweakness,saysProf.BrianClark,studyauthoranddirectoroftheOhioMusculoskeletalandNeurologicalInstitute.

Hereferstomusclesasthenervoussystemspuppets,withthebrainactingasthestringpromptingthemusclestomove.

Findingsunveilimportanceofbraininregulatingmusclestrength

Toconducttheirstudy,theteamhadagroupofhealthyindividualsundergo4weeksofwrist-handimmobilization-achievedbywearingacast-toencouragemuscleweakness.Meanwhile,anothergroupalsounderwent4weeksofimmobilization,buttheyperformedmentalimageryofstrongmusclecontractions5daysperweek.

Inaddition,acontrolgroupunderwentnointerventions.MedicalNewsTodaydidnothaveaccesstothenumberoftotalsubjectswhoparticipatedinthestudy.Before,immediatelyafterand1weekfollowingtheimmobilizationinterventions,theresearchersmeasuredwristflexorstrength.

Asthefirstgroupimaginedcontractingtheirmusclesandflexingtheirwrist,theresearchersrecordedtheirmuscleactivityusinganelectromyogram(EMG).

Overall,theresultsshowedthatthementalimagerytrainingattenuatedthelossofstrength.Explainingtheirfindingsfurther,Prof.Clarksays:

Whatourstudysuggestsisthatimageryexercisescouldbeavaluabletooltopreventorslowmusclesfrombe







































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