- Email: [email protected]
Functional reserve at the trunk of elderly and young females during the sit-to-stand
Abstracts
COMPARISONOFCTANDMRlESMMATESOFlNERTUL
PROPERTJESOFTEEEUMANTRUNK
D.J. PRARSALL and J.G. REID Deputmsllt of Anatomy and cdl Biology, and School of Pbysial aud Health Education, Qwea’s University. King&o, Gatario, Cauada, K7L 3N6 Theplrpasof~drdy~toQttcmiw~diffarracehr~coapltedT~y(cT)md~c Romxwarmagery(MRI)fbrcalculatiooof iwrtiaipropc&6oftbe~tmakinvivo. Twomalsmlbjects MCrPndMRtMnsneinrOgwU~~&uesI~iathetnslL(~~, +lOcmawJ +2Ocm aupe&rly). crdioihlimysr~~~byQlibnthUpixavliluablraown~~~~ofbol#, muscle, tkt and loag tissues. For the MRI. pixels regions were ickntitkl acwnding to difiFacat tiaswa ofiwtiawaecslculatui. llwMRI-crdifkcaceain dC&tiO!l.TXUllklan~,llUssc&OI8udlWOlMl mass, volume aad dmsity e&mates in tbs abdokml reoiop IYII@ from -0.3% to -7.6% while tknacic mgion mramuesvariedffom7.oto-1.8%. MRIandcrcklwoosofcul~ofmMslccatials~fouudtobe withia10mm0feachotber. Tbed&wx?e6betwamcraodMRIteohaiqwsinmommtofiwrtiavaluw ww~$ngt+om-14.9%ro18.9%. AMbougbtbesamplasisewaalimitai,tbawreadtsauggeattbat dcwmi>nmkaBgmtatilleltialpmpartislankeffactive; however,cammlMtbegivca movemmtdiawtionscmatedbythe toidaatiQiagbonerogbnwoftbespiwandribageaswdlasmdwing momeatofiBa&le&mta. Iftba3elimitatiamcanba ow?come. MRI tachniqw hartto‘minimkeRrorin ooulabesaployedtodeterminebody~t~~udpermit~biomschsnicllmodel rejmwatatiw of various population groups. (Supported by NSERC A7154)
TRUNKMUSCULATUREMEA~
OFTEMANDOBESEMALESUSlNGMRI
Wood, S., Peusall. D.J., Ross, R. and Reid, J.G. school of Pbysial md Halth Bducatioa. awl, Dsputmsat of Anatomy and Cell Biology, Queen’s University, Kings&m, Gntario, K7L 3N6 The~of~rhdywsetocompuslrmscle~IttbsIARJlewa~~~~c ReaawawIamgry@ARI)onhvwdiatiactpop&ioagroups:obeaeandtbin&jects. Tcasubjoctawem mlec&cmtbebaaii0ftheirmlativeobcaityandtbinws. Tbemwclewldv&dxalbodyprofilmwers digitiasdfromtbeMRIdata. Themrtomicrlcrww&malarenaandmlativopoaitioatotbewrtebmceatroid of the pmas, parespinals, rectus abdominis, and oblique muscka m c&&ted. No aigaificant difknncea in crocpsectionrluawen,foundbdwesn~;however,~~~mo~~for~pbdominismd [email protected])fwtheobsregroup, Fulthordiffbfawmay hvebssD~edhd~srmplseizsebesacwpusd.M~pomstric~~wraddi~ in moment arms nuy help to ideatify differeat loading mechanisms co tba lumbar spine for specific pop&&ion (supported by NSERC A7154) gwclps*
FUNCTIONAL RESERVE AT THE TRUNK OF ELDERL,Y AND YOUNG FEMALES DURING THE SlT-TO-SMND Thomas M. L\mdin+. Mark D. Grabiicr*, Dennis W. Jabnigm**
The Clewland Clinic Foundation, Clevelaod, OH 44195 Thir~~thesffectoftbeincrauein~R~~~ia~~y~~te~tha~t~(sTs) &uxwexoathefunctionalreaerveofthetnmk. Punctiooalwerveisaqnaatitywbichxeprwatstbediffemncebehvsaatha maximum isonx&ic strcagtb capability at a joint and peak joint mDmeatrequimddwingex~tiwoftbeSTSta&. nvosubjwts groups, a young ~mmn(ad) ages 22.9 (1.0) yearn, n==7Jand an 0lMy [age: 74.3 (4.1) years, n-71 pop&&n p&mwd five trials ofSTSandtwotrialsofmaximum isometric trunk exteusion U tnmk fkmion uqlea of 45,30,15,0 (tnmk otkted vwtially), and -1sdegrcca. Muincumhonkfl~onMgle(rslptiwto~~)radI#ktrunlraJrtcadonmomeatrduringths~wwscrlaylrtsd and timctional lwe#vevalueawerecomputed~vetothu~komdric~v~. Itwashypotbmized~l) rbe functioo;lrraaveattbatnmLoftheadcrlywouldbelsgthPl~of~y~~,Ud2) by+wsing tbstnJnkfbxioa PngledurinOSTS,a~ysubjects~dbesBavatoincraar~functioerlrrmrve~~h,twk. Maxmmmtrunktlexionryla of the elderly po@tioo was, on average, 44.5 degmw, versus:35.6 w for tbs young popuktk. Fwctkmal we for the elderly subjaots was 46 R , while the yooog had a functional mserveof6296. Hadtbeedd&ypopuMionflexcdtoasiodlarextatt astheyolmgpop&ionmvinpSTStheirfimctioaal rwarvewooldbavedacnwcdto37%. neleaultaofthisstudyMppo&tbal eontention~amotorstnteeyimplemcot~g~traalrflsxionmpisgtho~mry~~sdectedtoincrsueRactiaarl~ at the TV&. It is suggested that fuoctiooal reserve is increased by taking advaotage of the le+h-tension mlatioasbip of the tnmk exteosor muscles.
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COMPARISONOFCTANDMRlESMMATESOFlNERTUL
PROPERTJESOFTEEEUMANTRUNK
D.J. PRARSALL and J.G. REID Deputmsllt of Anatomy and cdl Biology, and School of Pbysial aud Health Education, Qwea’s University. King&o, Gatario, Cauada, K7L 3N6 Theplrpasof~drdy~toQttcmiw~diffarracehr~coapltedT~y(cT)md~c Romxwarmagery(MRI)fbrcalculatiooof iwrtiaipropc&6oftbe~tmakinvivo. Twomalsmlbjects MCrPndMRtMnsneinrOgwU~~&uesI~iathetnslL(~~, +lOcmawJ +2Ocm aupe&rly). crdioihlimysr~~~byQlibnthUpixavliluablraown~~~~ofbol#, muscle, tkt and loag tissues. For the MRI. pixels regions were ickntitkl acwnding to difiFacat tiaswa ofiwtiawaecslculatui. llwMRI-crdifkcaceain dC&tiO!l.TXUllklan~,llUssc&OI8udlWOlMl mass, volume aad dmsity e&mates in tbs abdokml reoiop IYII@ from -0.3% to -7.6% while tknacic mgion mramuesvariedffom7.oto-1.8%. MRIandcrcklwoosofcul~ofmMslccatials~fouudtobe withia10mm0feachotber. Tbed&wx?e6betwamcraodMRIteohaiqwsinmommtofiwrtiavaluw ww~$ngt+om-14.9%ro18.9%. AMbougbtbesamplasisewaalimitai,tbawreadtsauggeattbat dcwmi>nmkaBgmtatilleltialpmpartislankeffactive; however,cammlMtbegivca movemmtdiawtionscmatedbythe toidaatiQiagbonerogbnwoftbespiwandribageaswdlasmdwing momeatofiBa&le&mta. Iftba3elimitatiamcanba ow?come. MRI tachniqw hartto‘minimkeRrorin ooulabesaployedtodeterminebody~t~~udpermit~biomschsnicllmodel rejmwatatiw of various population groups. (Supported by NSERC A7154)
TRUNKMUSCULATUREMEA~
OFTEMANDOBESEMALESUSlNGMRI
Wood, S., Peusall. D.J., Ross, R. and Reid, J.G. school of Pbysial md Halth Bducatioa. awl, Dsputmsat of Anatomy and Cell Biology, Queen’s University, Kings&m, Gntario, K7L 3N6 The~of~rhdywsetocompuslrmscle~IttbsIARJlewa~~~~c ReaawawIamgry@ARI)onhvwdiatiactpop&ioagroups:obeaeandtbin&jects. Tcasubjoctawem mlec&cmtbebaaii0ftheirmlativeobcaityandtbinws. Tbemwclewldv&dxalbodyprofilmwers digitiasdfromtbeMRIdata. Themrtomicrlcrww&malarenaandmlativopoaitioatotbewrtebmceatroid of the pmas, parespinals, rectus abdominis, and oblique muscka m c&&ted. No aigaificant difknncea in crocpsectionrluawen,foundbdwesn~;however,~~~mo~~for~pbdominismd [email protected])fwtheobsregroup, Fulthordiffbfawmay hvebssD~edhd~srmplseizsebesacwpusd.M~pomstric~~wraddi~ in moment arms nuy help to ideatify differeat loading mechanisms co tba lumbar spine for specific pop&&ion (supported by NSERC A7154) gwclps*
FUNCTIONAL RESERVE AT THE TRUNK OF ELDERL,Y AND YOUNG FEMALES DURING THE SlT-TO-SMND Thomas M. L\mdin+. Mark D. Grabiicr*, Dennis W. Jabnigm**
The Clewland Clinic Foundation, Clevelaod, OH 44195 Thir~~thesffectoftbeincrauein~R~~~ia~~y~~te~tha~t~(sTs) &uxwexoathefunctionalreaerveofthetnmk. Punctiooalwerveisaqnaatitywbichxeprwatstbediffemncebehvsaatha maximum isonx&ic strcagtb capability at a joint and peak joint mDmeatrequimddwingex~tiwoftbeSTSta&. nvosubjwts groups, a young ~mmn(ad) ages 22.9 (1.0) yearn, n==7Jand an 0lMy [age: 74.3 (4.1) years, n-71 pop&&n p&mwd five trials ofSTSandtwotrialsofmaximum isometric trunk exteusion U tnmk fkmion uqlea of 45,30,15,0 (tnmk otkted vwtially), and -1sdegrcca. Muincumhonkfl~onMgle(rslptiwto~~)radI#ktrunlraJrtcadonmomeatrduringths~wwscrlaylrtsd and timctional lwe#vevalueawerecomputed~vetothu~komdric~v~. Itwashypotbmized~l) rbe functioo;lrraaveattbatnmLoftheadcrlywouldbelsgthPl~of~y~~,Ud2) by+wsing tbstnJnkfbxioa PngledurinOSTS,a~ysubjects~dbesBavatoincraar~functioerlrrmrve~~h,twk. Maxmmmtrunktlexionryla of the elderly po@tioo was, on average, 44.5 degmw, versus:35.6 w for tbs young popuktk. Fwctkmal we for the elderly subjaots was 46 R , while the yooog had a functional mserveof6296. Hadtbeedd&ypopuMionflexcdtoasiodlarextatt astheyolmgpop&ionmvinpSTStheirfimctioaal rwarvewooldbavedacnwcdto37%. neleaultaofthisstudyMppo&tbal eontention~amotorstnteeyimplemcot~g~traalrflsxionmpisgtho~mry~~sdectedtoincrsueRactiaarl~ at the TV&. It is suggested that fuoctiooal reserve is increased by taking advaotage of the le+h-tension mlatioasbip of the tnmk exteosor muscles.
621