Transfer of the curvature aftereffect in dynamic touch.

TLDR: The existence and intermanual transfer of curvature aftereffects for dynamic touch were investigated and it is concluded that the representation of object information depends on the exploration mode that is used to acquire information.

About: This article is published in Neuropsychologia.The article was published on 2008-10-01 and is currently open access. It has received 21 citations till now. The article focuses on the topics: Curvature.

Figures

Fig. 3. (a) Mean results of the aftereffect for eight subjects. The error bars represent th explored by self-induced exploration with the index finger. In the passive conditions, the the conditions in which the adaptation and test stimuli were touched by the same index fi stimulus was touched by the right index finger and the test stimulus was touched by the active–passive condition, the adaptation stimulus was explored actively, while the test sti the adaptation stimulus was followed by active exploration of the test stimulus.

Fig. 2. Examples of two psychometric curves of one subject in an active, samefinger condition. The response is plotted against the curvature of the test stimulus. The psychometric curves were obtained by fitting cumulative Gaussians to the data. The circular data points represent the response when adaptation was performed with the convex adaptation stimulus; the square data points result from adaptation with the concave adaptation stimulus. The points of subjective equalities are given by PV and PC, respectively. The magnitude of the aftereffect (AE) is defined as the difference between PV and PC.

Fig. 1. Experimental setup. The arms rested on a support that was 19 cm above the tabletop. The stimuli were placed in slits on a platform, which was 14 cm above the tabletop. Thedistancebetween the centresof the slitswas40 cm. In this example, the subject explores the concave adaptation stimulus with the right index finger before touching the test stimulus with the opposite index finger. In the active conditions, the stimuli remained in a fixed position; in the passive conditions, a computer controlled steppingmotormoved the platform. The surface of the stimuli was circularly curved. The length of the stimuliwas 200mm, and thewidthwas 20mm. The height at the side of the stimuli was 40mm.

Fig. 4. (a1) Illustration of convex and concave stimuli in contact with a single finger by st indentation profile on the finger. (a2) Static touch with different parts of the hand that co each contact point must be combined with information about the position of the finger in information sources when there is dynamic contact between the finger and a stimulus. (b1 The deformation depends on the direction of movement contact, as indicated by an arro (rotation), when the finger moves over the stimulus surface. In the example, the finger rem on the finger does not change. Besides, the finger displaces in the vertical direction, but th of the finger with respect to the stimulus surface can change when the finger moves ove finger does not rotate.

Frequently asked questions

Q1. What contributions have the authors mentioned in the paper "Transfer of the curvature aftereffect in dynamic touch" ?

Van der Horst et al. this paper investigated the transfer of curvature aftereffect when curved surfaces were explored dynamically by a single finger. 

Q2. What have the authors stated for future works in "Transfer of the curvature aftereffect in dynamic touch" ?

This finding raises interesting questions about the importance of self-induced movement in dynamic touch, which might be the subject of future studies.