Open Accesssegmentary mechanical work as a new instrument to postural control evaluation
Author(s) -
Pedro Cláudio Gonsales de Castro,
Daniel Gustavo Goroso,
Daniel Boari Coelho,
José Augusto Fernandes Lopes,
Denise Vianna Machado Ayres,
Linamara Rizzo Battistella
Publication year - 2019
Publication title -
acta fisiátrica
Language(s) - English
Resource type - Journals
eISSN - 2317-0190
pISSN - 0104-7795
DOI - 10.11606/issn.2317-0190.v26i4a168984
Subject(s) - kinematics , trunk , perturbation (astronomy) , mathematics , significant difference , mechanical energy , work (physics) , physical medicine and rehabilitation , audiology , statistics , physics , medicine , classical mechanics , ecology , power (physics) , quantum mechanics , biology , thermodynamics
Objectie: Calculate the mechanical work (W), applying the total mechanical work (Wtot) and segmental work (Wseg) as a new complementary evaluation resource of the postural control mechanisms in subjects undergoing motor and visual disturbance. Methods: Ten healthy adult male volunteers were selected with ages 25.6 (±2.26) years, whose height was 1.69 (± 0.25) m and body weight was 68.22 (± 0.25) kg. Kinematic data of trunk extension with eyes open and blindfolded were captured with a frequency of 200 Hz. This way the post perturbation interval has been selected and the Wseg (i.e. trunk, head, etc) and the total mechanical work (Wtot) calculated, which were obtained by means of total integral mechanical energy. Results: The statistical analyzing of information was done by paired-data Student's t test. There has been no significant difference (p<0,08) for the Wtot during the post perturbation interval. On the other hand, there has been a significant difference (p<0.05) in the post perturbation interval of Wseg. However, there were significant differences in interval (p<0.05). This difference is related to Wseg of head (Whead) and lower limbs (Wleg and Wthigh ) in the post-perturbation interval with early range of [0. 60] ms and [0. 100] ms after the self-perturbation. Conclusion: These differences that were found in Whead between the two conditions can be associated with modulations of the vestibulo-ocular-motor system. On the other hand, the differences that were found in Wleg and Wthigh can be associated with somato-sensory adjustment mechanisms.