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Grasp corrections do not reliably affect size perception

When grasping an object, the opening of the fingers is proportional to the size of the object. When an object changes in size, the fingertip opening has to be corrected. In this study I demonstrate that such a corrective movement does not seem to affect the perceived size of the object.

Study on ‘action observation of assymetric objects’ published.

A new paper in collaboration with Guy Rens, Jean-Jacques Orban de Xivry, and Marco Davare has been published. In it, we show that if one observes someone lifting an object with an asymmetric weight distribution, this modulates activity in the motor cortex. Results indicated that this motor resonance is drived by observed and planned digit positioning.

Size perception and grasping corrections: new preprint

When grasping an object, the opening of the fingers is proportional to the size of the object. When an object changes in size, the fingertip opening has to be corrected. In this study I demonstrate that such a corrective movement does not seem to affect the perceived size of the object.

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My Research

What I do in the Laboratory

In my research I am interested in the interaction between action and perception. The ‘actions’ I investigate are hand movements. Our hands are very important to interact with our environment: we use them all the time to manipulate objects.

The manipulation of an object starts with grasping and lifting it. This might seem easy, but if we don’t want to squeeze a fragile object such as an egg, for example, we have to scale our fingertip forces and grip to the object properties. At the same time, we receive information about these properties by getting feedback from sensors in the skin. This is very useful if we have never touched the object before as it allows us to learn how to handle it.

To investigate how hand movements and fingertip forces are planned and controlled during grasping and lifting objects of different sizes and weights, I use precise motion tracking and force sensors. Furthermore, I examine how humans adjust their movements to new sensory information or multi-sensory conflicts. I also investigate the perception of objects by using psychophysical techniques, for instance, by asking participants how large or how heavy they think objects are. By comparing these measures, I study how these perceptual and motor effects are related to each other.

In addition, I am looking at which brain areas are involved in the control of these action and perceptual systems. I use transcranial magnetic stimulation to stimulate the brain and evaluate how this affects the control of movements and the perception of objects.

Curriculum Vitæ

A brief overview of what I did before

I have a background in Human Movement Sciences and in psychophysics (the study of perception). After I finished my bachelor Human Movement Sciences at VU Amsterdam in the Netherlands, I continued to master Human Movement Sciences at the same university. As part of my master, I performed a research internship in at the Manchester Metropolitan University in the United Kingdom. In this project, I studied the eye–hand coordination in pointing tasks.

After graduating, I started a PhD on haptic perception at Utrecht University and continued this position after two years at the VU Amsterdam. During these four years, I investigated the haptic saliency of object properties with haptic search tasks. If a property is salient, this means it is processed very efficiently. Therefore, it can be felt very easily and quickly. In addition, I looked at the exploration movements that are made when haptically searching for object properties.

I currently work at the KU Leuven in Belgium, where I explore the relations between action and perception in grasping movements. At the Motor Control and Neuroplasticity lab, I have the opportunity to also investigate the brain areas that are important in controlling action and perception systems. Since 2017, my research is funded by an FWO post-doctoral fellowship.

Since 2017, I am a member of the junior board of the Belgian Society for Neuroscience.

Publications

The articles that I have published

2021

  1. Van Polanen, V. (2021). Grasp aperture corrections in reach-to-grasp movements do not reliably alter size perception. PLOS ONE 16(9): e0248084.
    doi: https://doi.org/10.1371/journal.pone.0248084
  2. Rens, G., Orban de Xivry, J., Davare, M.,* & Van Polanen, V.* (2021). Motor resonance is modulated by an object's weight distribution. Neuropsychologia 156, 107836.
    doi: https://doi.org/10.1016/j.neuropsychologia.2021.107836 | Preprint
  3. Rens, G., Orban de Xivry, J., Davare, M.,* & Van Polanen, V.* (2021). Lift observation conveys object weight distribution but partly enhances predictive lift planning. Journal of Neurophysiology .
    doi: https://doi.org/10.1152/jn.00374.2020

2020

  1. Merken, L., & van Polanen, V. (2020). Density estimation is influenced more by mass when objects are denser. In: Haptics: Science, Technology, Applications. EuroHaptics 2020. Lecture Notes in Computer Science vol. 12272. Springer, Cham.
    doi: https://doi.org/10.1007/978-3-030-58147-3_10
  2. van Polanen, V., Rens, G., & Davare, M. (2020). The role of the anterior intraparietal sulcus and the lateral occipital cortex in fingertip force scaling and weight perception during object lifting. Journal of Neurophysiology 124, 557–573.
    doi: https://doi.org/10.1152/jn.00771.2019
  3. Van Polanen, V., Buckingham, G., & Davare, M. (2020). Effects of TMS over the anterior intraparietal area on anticipatory fingertip force scaling and the size-weight illusion. BioRxiv 2020.05.18.101675.
    doi: https://doi.org/10.1101/2020.05.18.101675
  4. Rens, G., van Polanen, V., Botta, A., Gann, M.A., Orban de Xivry, J., & Davare, M. (2020). Sensorimotor expectations bias motor resonance during observation of object lifting: the causal role of pSTS. Journal of Neuroscience 40, 3995–4009.
    doi: https://doi.org/10.1523/JNEUROSCI.2672-19.2020

2019

  1. van Polanen, V., & Davare, M. (2019). Dynamic size-weight changes after object lifting reduce the size-weight illusion. Scientific Reports 9, 15697 (2019).
    doi: https://doi.org/10.1038/s41598-019-52102-y
  2. van Polanen, V., & Davare, M. (2019). Sensorimotor memory for object weight is based on previous experience during lifting, not holding. Neuropsychologia 131, 306–315.
    doi: https://doi.org/10.1016/j.neuropsychologia.2019.05.025 | Preprint | Postprint
  3. van Polanen, V., Tibold, R., Nuruki, A., & Davare, M. (2019). Visual delay affects force scaling and weight perception when lifting objects in virtual reality. Journal of Neurophysiology .
    doi: https://doi.org/10.1152/jn.00396.2018

2018

  1. Rounis, E., van Polanen, V., & Davare, M. (2018). A direct effect of perception on action when grasping a cup. Scientific Reports 8, 171.
    doi: https://doi.org/10.1038/s41598-017-18591-5

2017

  1. Plaisier, M.A., van Polanen, V., & Kappers, A.M.L. (2017). The role of connectedness in haptic object perception. Scientific Reports 7, 43868.
    doi: https://doi.org/10.1038/srep43868

2016

  1. van Polanen, V., Bergmann Tiest, W.M., & Kappers, A.M.L. (2016). A simple model of the hand for the analysis of object exploration. In: Human and Robot Hands 235–258. Springer International Publishing.
    doi: https://doi.org/10.1007/978-3-319-26706-7_14

2015

  1. van Polanen, V., & Davare, M. (2015). Sensorimotor memory biases weight perception during object lifting. Frontiers in Human Neuroscience 9, 700.
    doi: https://doi.org/10.3389/fnhum.2015.00700
  2. van Polanen, V., & Davare, M. (2015). Interactions between dorsal and ventral streams for controlling skilled grasp. Neuropsychologia 79, Part B, 186–191.
    doi: https://doi.org/10.1016/j.neuropsychologia.2015.07.010

2014

  1. van Polanen, V., Bergmann Tiest, W.M., Creemers, N., Verbeek, M.J., & Kappers, A.M.L. (2014). Optimal exploration strategies in haptic search. Eurohaptics 2014 Part I, LNCS 8618 (pp. 185–191). Berlin Heidelberg: Springer-Verlag
    doi: https://doi.org/10.1007/978-3-662-44193-0_24
  2. van Polanen, V., Bergmann Tiest, W.M., & Kappers, A.M.L. (2014). Target contact and exploration strategies in haptic search. Scientific Reports 4, 6254.
    doi: https://doi.org/10.1038/srep06254
  3. van Polanen, V., Bergmann Tiest, W.M., & Kappers, A.M.L. (2014). Parallel processing of shape and texture in haptic search. Acta Psychologica 150, 35–40.
    doi: https://doi.org/10.1016/j.actpsy.2014.04.004.
  4. van Polanen, V. (2014). Findings in haptic (re)search (Doctoral dissertation). VU University, Amsterdam
    Read this publication

2013

  1. van Polanen, V., Bergmann Tiest, W.M., & Kappers, A.M.L. (2013). Integration and disruption effects of shape and texture in haptic search. PLoS ONE 8(7), e70255.
    doi: https://doi.org/10.1371/journal.pone.0070255

2012

  1. van Polanen, V., Bergmann Tiest, W.M., & Kappers, A.M.L. (2012). Haptic search for hard and soft spheres. PLoS ONE 7(10), e45298.
    doi: https://doi.org/10.1371/journal.pone.0045298
  2. van Polanen, V., Bergmann Tiest, W.M., & Kappers, A.M.L. (2012). Haptic pop-out of movable stimuli. Attention, Perception & Psychophysics 74(1), 204–215.
    doi: https://doi.org/10.3758/s13414-011-0216-5

2011

  1. van Polanen, V., Bergmann Tiest, W.M., & Kappers, A.M.L. (2011). Movement strategies in a haptic search task. IEEE World Haptics Conference (WHC) 2011, (pp. 275–280). IEEE.
    doi: https://doi.org/10.1109/WHC.2011.5945498
  2. Deconinck, F., van Polanen, V., Savelsbergh, G.J.P., & Bennett, S. (2011). The relative timing between eye and hand rapid sequential pointing is affected by time pressure, but not by advance knowledge. Experimental Brain Research 213, 99–109.
    doi: https://doi.org/10.1007/s00221-011-2782-0

* indicates an equal contribution from authors.