Naslov
Reliability of parameters frequently used for the evaluation of arm motor function

Autori
Trošt Bobić, Tatjana ; Zavoreo, Iris ; Šimić, Goran

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Dan doktorata 2016. Knjiga sažetaka. PhD Day 2016. Abstract book / - , 2016, 37-37

Skup
Dan doktorata

Mjesto i datum
Zagreb, Hrvatska, 20.05.2016

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
upper extremity motor function, dynamometry, reliability, stroke recovery

Sažetak
Introduction: A wide number of stroke survivors never fully recover the function of the affected arm. The use of objective kinetic measures to quantify hand function may facilitate the clinical adoption of behavioral interventions for stroke, such as constraint-induced movement therapy and other bimanual task practice-based interventions. The aim of this study was to evaluate the intra- and inter-session reliability of numerous dynamometric parameters that are frequently used for the evaluation of arm motor function. Materials and methods: A new custom-made measurement system was designed and built. One hundred fifty healthy active individuals (20.5±1.7 years) where included in the validation study. They were asked to perform three maximal voluntary wrist flexion and extension stressing explosive force production. Signals were recorded by means of load cells and electrogoniometers. Altogether sixteen parameters, which are frequently used to evaluate arm motor function where computed from the recorded signals. Three components of reliability were calculated: systematic bias, within-individual variation, and retest correlation. Results: Intra-session reliability - Within individual variation (coefficient of variance - CV) varied from 13.8% to 19.2% for almost all the parameters (i.e. max. average force, rate of force development) established in the time intervals of 30 and 50 ms. When the same parameters where extracted for 100 and 200 ms CV remained in the range of 6.4-11.9%. The majority of parameters had a high intra-session reliability (intraclass correlation coefficient – ICC=0.84- 0.91). Inter-session reliability - CV ranged 4.8%-17.5%. High ICC were obtained for almost all the parameters (ICC=0.81-0.9). Discussion: The main finding of this study is that the extracted variables had better inter- and intra-session reliability when calculated for the time interval of 100 and 200 ms of maximal voluntary contraction (MVC), rather than for 30 and 50 ms respectively. Such data suggests that the indices of arm motor function should be calculated in wider time windows of MVC. The obtained results will be implemented in the upcoming investigation of the doctoral thesis, which is about the effectiveness of different exercise therapy modalities on hand motor function recovery after stroke. Using the most reliable variables will allow greater security in drawing conclusions on the fact that an eventually registered motor recovery is due to the implemented therapy, rather than just an accidental error of measurement.

Izvorni jezik
Engleski

Znanstvena područja
Temeljne medicinske znanosti, Kliničke medicinske znanosti, Kineziologija

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