The statistics of natural hand movements

Ingram, James N.; Körding, Konrad P.; Howard, Ian S.; Wolpert, Daniel M.

doi:10.1007/s00221-008-1355-3

Cited by 294 publications

(313 citation statements)

References 39 publications

(68 reference statements)

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“…Previous mental rotation studies have only paid little attention to the role of the thumb as a special digit of the human hand. This is surprising, given the special role of the thumb in human hand anatomy and hand function [e.g., 6,7,8,15]. Several studies pointed towards the significance of the thumb as asymmetry marker in handedness tasks if visual strategies are applied [e.g., 19,20].…”

Section: Introductionmentioning

confidence: 99%

Does thumb posture influence the mental rotation of hands?

Bläsing

Brugger

Weigelt

et al. 2013

Neuroscience Letters

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The function of thumb posture in mental rotation has not yet been studied intensely, despite its special role in manual action. To investigate if thumb posture modifies relative visual and proprioceptive contributions, we conducted two experiments comprising hand laterality judgement tasks with identical stimuli (left and right hands in palmar and dorsal views presented at four orientations). In half of the stimuli, all digits were extended, whereas in the other half the thumb was flexed into the palm of the hand. In the second experiment, participants' thumbs were taped in the same flexed posture that was displayed in half of the stimuli one hour previous to and throughout the experiment. Results of both experiments revealed effects of orientation, side and view on reaction time, but an effect of stimulus thumb posture occurred only in the second experiment in which participants' thumbs were fixed. In palmar view, stimuli rotated by 90°with fingers pointing toward the participant's midline had shorter reaction times than stimuli rotated (evidentially less comfortably) in the opposite direction. This finding suggests that participants applied motor imagery strategies for palmar but not for dorsal views of the hand, indicating a difference in visual and sensorimotor familiarity. AbstractThe function of thumb posture in mental rotation has not yet been regarded intensely, despite of the specific role of the thumb in manual action. To investigate whether thumb posture would modify the relative visual and proprioceptive contributions, we conducted two experiments with identical stimuli (left and right hands in palmar and dorsal views presented at four orientations) in which participants were asked to give handedness judgements. In half of the stimuli, the thumb was extended like the other digits, in the other half the thumb was flexed into the palm of the hand. In the second experiment, the participant's thumbs were fixed in the same posture as displayed in half of the stimulus pictures; thumbs were taped to the palm of the hands one hour previous to and throughout the experiment. Results of both experiments revealed effects of orientation, side and view on reaction time, but an effect of stimulus thumb posture occurred only in the second experiment in which the participants' thumbs were fixed. Medial-over-lateral advantage as indicator of motor imagery was found only for palmar stimuli, suggesting that participants applied different strategies for the different views of the hand, probably based on different visual and sensorimotor familiarity. IntroductionMental rotation of human body parts, especially hands, has been found to differ essentially from mental rotation of abstract objects [13,17]. Using a handedness paradigm in which participants had to decide if a displayed hand was a right or left one, Parsons [13,14] showed that RTs were not only influenced by the rotation angle of the hand stimulus but also by the implicit awkwardness of the displayed hand position. He concluded that movements performed...

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Section: Introductionmentioning

confidence: 99%

Does thumb posture influence the mental rotation of hands?

Bläsing

Brugger

Weigelt

et al. 2013

Neuroscience Letters

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“…They found a strong relationship between the two structures with better performance when both match. While it has been shown that human fingers have separable DOF [6], 3D manipulation is inherently an integral task [7]. The thumb, index and middle fingers can be moved e-mail: anthony.martinet@lifl.fr e-mail: gery.casiez@lifl.fr e-mail: laurent.grisoni@lifl.fr separately from one another while users perceive the attributes of 3D objects (position and orientation) as a whole.…”

Section: Introductionmentioning

confidence: 99%

“…Considering the separable structure of fingers [6], it appears impossible to exactly match the perceptual structure of the task with the control structure of multi-touch displays. The previous work above shows there is no clear answer to this problem.…”

Section: Introducing Ds3mentioning

confidence: 99%

Integrality and Separability of Multitouch Interaction Techniques in 3D Manipulation Tasks

Martinet¹,

Casiez²,

Grisoni³

2012

IEEE Trans. Visual. Comput. Graphics

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Abstract-Multi-touch displays represent a promising technology for the display and manipulation of data. While the manipulation of 2D data has been widely explored, 3D manipulation with multi-touch displays remains largely unexplored. Based on an analysis of the integration and separation of degrees of freedom, we propose a taxonomy for 3D manipulation techniques with multi-touch displays. Using that taxonomy, we introduce DS3 (Depth-Separated Screen-Space), a new 3D manipulation technique based on the separation of translation and rotation. In a controlled experiment, we compared DS3 with Sticky Tools and Screen-Space. Results show that separating the control of translation and rotation significantly affects performance for 3D manipulation, with DS3 performing faster than the two other techniques.

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“…Adopting the representation used in [10], the articulation of the human hand can be described by 20 parameters encoding the angles of the human hand joints and thus forming a 20-dimensional space. However, only a fraction of this space contains valid hand configurations [6,17]. For example, if no external forces are applied, the range of motions that can be performed by each finger joint is limited [9].…”

Section: Introductionmentioning

confidence: 99%

Dimensionality Reduction for Efficient Single Frame Hand Pose Estimation

Douvantzis

Oikonomidis

Kyriazis

et al. 2013

Lecture Notes in Computer Science

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Abstract. Model based approaches for the recovery of the 3D position, orientation and full articulation of the human hand have a number of attractive properties. One bottleneck towards their practical exploitation is their computational cost. To a large extent, this is determined by the large dimensionality of the problem to be solved. In this work we exploit the fact that the parametric joints space representing hand configurations is highly redundant. Thus, we employ Principal Component Analysis (PCA) to learn a lower dimensional space that describes compactly and effectively the human hand articulation. The reduced dimensionality of the resulting space leads to a simpler optimization problem, so model-based approaches require less computational effort to solve it. Experiments demonstrate that the proposed approach achieves better accuracy in hand pose recovery compared to a state of the art baseline method using only 1/4 of the latter's computational budget.

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The statistics of natural hand movements

Cited by 294 publications

References 39 publications

Does thumb posture influence the mental rotation of hands?

Does thumb posture influence the mental rotation of hands?

Integrality and Separability of Multitouch Interaction Techniques in 3D Manipulation Tasks

Dimensionality Reduction for Efficient Single Frame Hand Pose Estimation

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