Zanesljivost modificiranega testa senzorične interakcije na eni nogi na pritiskovni plošči : diplomsko delo

Pavlović, Monika (author), Rugelj, Darja (mentor)

Uvod: Poleg stoje na obeh nogah je za človeka pomembno uspešno vzdrževanje drže in ravnotežja tudi na eni nogi. Ker pri mirni stoji, projekcija težišča ne miruje, omogočajo meritve različnih spremenljivk gibanja središča pritiska vrednotenje sposobnosti zadrževanja položaja stoje na eni nogi brez opore. Namen: Želeli smo ugotoviti kakšna je zanesljivost modificiranega testa senzorične interakcije na eni nogi na pritiskovni plošči pri mladih, zdravih preiskovankah. Metode dela: Pri raziskavi je sodelovalo 12 mladih (18 – 23 let) preiskovank ženskega spola. Testirali smo stojo na dominantni nogi na pritiskovni plošči v treh senzoričnih pogojih: na trdi podlagi z odprtimi očmi, na trdi podlagi z zaprtimi očmi in na mehki podlagi z odprtimi očmi. Vsaka meritev je trajala 60 sekund pri frekvenci vzorčenja 200 Hz. Za ugotavljanje zanesljivosti smo meritve ponovili po sedmih dneh, za analizo pa uporabili 30 sekund vsake meritve. Opazovanih je bilo devet spremenljivk gibanja središča pritiska: odmiki središča pritiska v medio-lateralni in antero-posterorni smeri, pot, hitrost, pot v medio-lateralni in antero-posteriorni smeri, ploščina izračunana z metodo lastnih vrednosti kovariančne matrike, ploščina Fourierjeve analize obrisa, količnik ploščin Fourierjeve analize obrisa in ploščine izračunane z metodo lastnih vrednosti kovariančne matrike. Rezultati: Najzanesljivejša spremenljivka pri stoji na trdi podlagi z odprtimi očmi je bila pot središča pritiska v medio-lateralni smeri (intraklasni korelacijski koeficient = 0,848). Pri stoji na trdi podlagi z zaprtimi očmi je bila najzanesljivejša spremenljivka količnik ploščin Fourierjeve analize obrisa in ploščine izračunane z metodo lasnih vrednosti kovariančne matrike (intraklasni korelacijski koeficient = 0,644). Enako kot pri stoji na trdi podlagi, se je tudi pri stoji na mehki podlagi z odprtimi očmi pokazala pot središča pritiska v medio-lateralni smeri kot najzanesljivejša spremenljivka (intraklasni korelacijski koeficient = 0,877). Razprava in zaključek: Modificirani test senzorične interakcije na eni nogi na pritiskovni plošči pri zdravih, mladih preiskovankah se je pokazal kot odlično, vendar hkrati tudi nezanesljiv. Kljub temu, da so nekatere spremenljivke prikazale slabo zanesljivost, so še vedno lahko tiste z odlično zanesljivostjo uporabljene pri ocenjevanju sposobnosti vzdrževanja drže in ravnotežja. Največ odlično zanesljivih spremenljivk (šest izmed devetih opazovanih) se je pokazalo pri stoji na mehki podlagi z odprtimi očmi.

• Language: Slovenian
• Keywords: test, senzorična interakcija, stoja na eni nogi, stabilometrija, zanesljivost
• Work type: Bachelor thesis/paper
• Organization: ZF - Faculty of Health Sciences
• Year: 2017
• PID: 20.500.12556/RUL-94447
• COBISS.SI-ID: 5301611
• Publication date in RUL: 26.08.2017

Secondary language

• Language: English
• Title: Reliability of modified sensory interaction - single leg stance test using a force platform : final thesis

Abstract

Introduction: In addition to standing on both feet, it is important for people to successfully maintain posture and balance on one leg as well. Since, in quiet stand, the projection of the center of pressure is never still, the measurement of the various variables of center of pressure movement enables the evaluation of the ability for single leg stance without support. Purpose: The purpose of this study was to determine the reliability of the modified sensory interaction single leg stance test using a force platform in young and healthy subjects. Methods: The study involved 12 young (18-23 years old) and healthy females. The test was performed standing on the dominant leg on the force platform for three sensory conditions: standing on a firm surface with eyes open and closed and on compliant surface with eyes open. Each measurement lasted 60 seconds at a sampling frequency of 200 Hz. To determine the reliability, the measurements were repeated after seven days, 30 seconds of each measurement was used for the analysis. Nine variables of the center of pressure movement were observed: medio-lateral and antero-posterior displacements, total path lenght, velocity, medio-lateral and antero-posterior path length, sway area from principal components, sway area calculated by Fourier coefficients and sway area calculated by Fourier coefficients divided by sway area from principal components. Results: The most reliable variable for standing on a firm surface with eyes open was medio-lateral path length (intraclass correlation coefficient = 0,848). For eyes closed, the most reliable variable was sway area calculated by Fourier coefficients divided by sway area from principal components (intraclass correlation coefficient = 0,644). As well as for standing on the firm surface with eyes open, medio-lateral path length was the most reliable variable also for standing on the compliant surface with eyes open (intraclass correlation coefficient = 0,877). Discussion and conclusion: When applied the modified sensory interaction single leg stance test on the force platform with healthy, young subjects the results varied from excellent reliability to not being reliable. Although some variables have shown poor reliability, those with excellent reliability can still be used for evaluating the abilities to maintain posture and balance. The most (six out of nine) observed variables proved excellent reliability during single leg stance on a compliant surface with eyes open.

• Keywords: test, sensory interaction, single leg stance, stabilometry, reliability