Misjudging where you felt a light switch in a dark room

Maij, Femke; Grave, Denise D. J. de; Brenner, Eli; Smeets, Jeroen B. J.

doi:10.1007/s00221-011-2680-5

Cited by 11 publications

(12 citation statements)

References 19 publications

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“…Dassonville (1995) was the first to study tactile localization during arm movements. Interestingly, he reported more pronounced errors than in the present and other related studies (Maij et al 2011b;Watanabe et al 2009). One possible reason could be differences in arm velocity.…”

Section: Discussionsupporting

confidence: 50%

“…When the arm is moving, the tactile input in the brain needs to be combined with dynamic information (i.e., proprioceptive feedback or efferent motor commands) about the ongoing arm movement to provide veridical spatial information in external coordinates. The present report addresses how the brain combines these signals in dynamic tactile localization.The few previous studies on dynamic tactile localization have shown that subjects systematically misperceive the location of tactile stimuli presented near the time of an arm movement (Dassonville 1995;Maij et al 2011b; Watanabe et al. 2009).…”

mentioning

confidence: 99%

“…The few previous studies on dynamic tactile localization have shown that subjects systematically misperceive the location of tactile stimuli presented near the time of an arm movement (Dassonville 1995;Maij et al 2011b; Watanabe et al. 2009).…”

mentioning

confidence: 99%

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Spatiotemporal integration for tactile localization during arm movements: a probabilistic approach

Maij

Wing

Medendorp

2013

Journal of Neurophysiology

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-It has been shown that people make systematic errors in the localization of a brief tactile stimulus that is delivered to the index finger while they are making an arm movement. Here we modeled these spatial errors with a probabilistic approach, assuming that they follow from temporal uncertainty about the occurrence of the stimulus. In the model, this temporal uncertainty converts into a spatial likelihood about the external stimulus location, depending on arm velocity. We tested the prediction of the model that the localization errors depend on arm velocity. Participants (n ϭ 8) were instructed to localize a tactile stimulus that was presented to their index finger while they were making either slow-or fast-targeted arm movements. Our results confirm the model's prediction that participants make larger localization errors when making faster arm movements. The model, which was used to fit the errors for both slow and fast arm movements simultaneously, accounted very well for all the characteristics of these data with temporal uncertainty in stimulus processing as the only free parameter. We conclude that spatial errors in dynamic tactile perception stem from the temporal precision with which tactile inputs are processed.haptics; mislocalization; human; movement; perception TACTILE STIMULI, e.g., a touch stimulus applied to the arm, are initially encoded in a somatotopic reference frame. To localize these tactile stimuli in external space a coordinate transformation is required, which must take postural information about the arm into account. Previous behavioral and neurophysiological studies have shown that this transformation process takes time (Azanon and Soto-Faraco 2008;Heed and Roder 2010).Under normal conditions the arm is typically not stationary at the time of a tactile stimulus. This provides additional complexity to tactile localization. When the arm is moving, the tactile input in the brain needs to be combined with dynamic information (i.e., proprioceptive feedback or efferent motor commands) about the ongoing arm movement to provide veridical spatial information in external coordinates. The present report addresses how the brain combines these signals in dynamic tactile localization.The few previous studies on dynamic tactile localization have shown that subjects systematically misperceive the location of tactile stimuli presented near the time of an arm movement (Dassonville 1995;Maij et al. 2011b; Watanabe et al. 2009). Until now, however, few explanations for these tactile localization errors have been provided. For example, Dassonville (1995) suggested that the localization errors relate to a temporal delay in the perception of the tactile stimulus, probably due to a combination of somatosensory delays and the internal misrepresentation of the movement trajectory. But how such delays cause the subsequent misrepresentation in a biological system is not straightforward, and requires a modeling approach. Here we consider the effects of temporal delay as well as temporal and spatial variability t...

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Section: Discussionsupporting

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confidence: 99%

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Spatiotemporal integration for tactile localization during arm movements: a probabilistic approach

Maij

Wing

Medendorp

2013

Journal of Neurophysiology

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“…As efferent information leads a movement, and afferent information is delayed with respect to the movement, the two might be in conflict during the movement (e.g. [28]). This conflict in position judgment during a movement might be one of the reasons why the movement paths are disturbed, without effects on the proprioceptive position sense at the endpoints.…”

Section: Discussionmentioning

confidence: 99%

Proprioception Is Robust under External Forces

2013

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Information from cutaneous, muscle and joint receptors is combined with efferent information to create a reliable percept of the configuration of our body (proprioception). We exposed the hand to several horizontal force fields to examine whether external forces influence this percept. In an end-point task subjects reached visually presented positions with their unseen hand. In a vector reproduction task, subjects had to judge a distance and direction visually and reproduce the corresponding vector by moving the unseen hand. We found systematic individual errors in the reproduction of the end-points and vectors, but these errors did not vary systematically with the force fields. This suggests that human proprioception accounts for external forces applied to the hand when sensing the position of the hand in the horizontal plane.

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“…Interestingly, some data suggest that similar phenomena also occur around the time of hand movements, when tactile stimuli are systematically mislocalized in the direction of the movement (Dassonville, 1995;Watanabe et al, 2009;Maij et al, 2011) and perceptually delayed with respect to the subjective onset time of the movement (Dassonville, 1995;Jackson et al, 2011). This suggests that similar strategies may be exploited by different sensorimotor systems during the active exploration of the environment.…”

Section: Introductionmentioning

confidence: 94%

Motor commands induce time compression for tactile stimuli

et al. 2013

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Saccades cause compression of visual space around the saccadic target, and also a compression of time, both phenomena thought to be related to the problem of maintaining saccadic stability (Morrone et al., 2005;Burr and Morrone, 2011). Interestingly, similar phenomena occur at the time of hand movements, when tactile stimuli are systematically mislocalized in the direction of the movement (Dassonville, 1995;Watanabe et al., 2009). In this study, we measured whether hand movements also cause an alteration of the perceived timing of tactile signals. Human participants compared the temporal separation between two pairs of tactile taps while moving their right hand in response to an auditory cue. The first pair of tactile taps was presented at variable times with respect to movement with a fixed onset asynchrony of 150 ms. Two seconds after test presentation, when the hand was stationary, the second pair of taps was delivered with a variable temporal separation. Tactile stimuli could be delivered to either the right moving or left stationary hand. When the tactile stimuli were presented to the motor effector just before and during movement, their perceived temporal separation was reduced. The time compression was effectorspecific, as perceived time was veridical for the left stationary hand. The results indicate that time intervals are compressed around the time of hand movements. As for vision, the mislocalizations of time and space for touch stimuli may be consequences of a mechanism attempting to achieve perceptual stability during tactile exploration of objects, suggesting common strategies within different sensorimotor systems.

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Misjudging where you felt a light switch in a dark room

Cited by 11 publications

References 19 publications

Spatiotemporal integration for tactile localization during arm movements: a probabilistic approach

Spatiotemporal integration for tactile localization during arm movements: a probabilistic approach

Proprioception Is Robust under External Forces

Motor commands induce time compression for tactile stimuli

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