A deep investigation of proprioceptive processes is necessary to understand the relationship between sensory afferent inputs and motor outcomes. In this work, we investigate whether and how perception of wrist position is influenced by the direction along which the movement occurs. Most previous studies have tested Joint Position Sense (JPS) through 1 degree of freedom (DoF) wrist movements, such as flexion/extension (FE) or radial/ulnar deviation (RUD). However, the wrist joint has 3-DoF and many activities of daily living produce combined movements, requiring at least 2-DoF wrist coordination. For this reason, in this study, target positions involved movement directions that combined wrist flexion or extension with radial or ulnar deviation. The chosen task was a robot-aided Joint Position Matching (JPM), in which blindfolded participants actively reproduced a previously passively assumed target joint configuration. The JPM performance of 20 healthy participants was quantified through measures of accuracy and precision, in terms of both perceived target direction and distance along each direction of movement. Twelve different directions of movement were selected and both hands tested. The left and right hand led to comparable results, both target extents and directions were differently perceived according to the target direction on the FE/RUD space. Moreover, during 2-DoF combined movements, subjects’ perception of directions was impaired when compared to 1-DoF target movements. In summary, our results showed that human perception of wrist position on the FE/RUD space is symmetric between hands but not isotropic among movement directions.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Wrist Position Sense in Two Dimensions: Between-Hand Symmetry and Anisotropic Accuracy Across the Space



    Erscheinungsdatum :

    2021-01-01



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Klassifikation :

    DDC:    629 / 796



    Automatic segmentation of hand-wrist radiographs

    Manos, G. / Cairns, A. Y. / Ricketts, I. W. et al. | British Library Online Contents | 1993


    solid hand oar with finger ear and wrist rest

    HOU JING | Europäisches Patentamt | 2016

    Freier Zugriff

    Sensing Hand Interactions with Everyday Objects by Profiling Wrist Topography

    Rudolph, Julius Cosmo Romeo / Holman, David / De Araujo, Bruno et al. | BASE | 2022

    Freier Zugriff


    Columnists - Why Fiats make second-hand sense

    Coates, John | Online Contents | 2003