A Novel Length Display Device for Cognitive Experiments and Rehabilitation

A Novel Length Display Device for Cognitive Experiments and Rehabilitation

Naotsugu Kitayama (Graduate School of Natural Science and Technology, Okayama University, Japan), Haibo Wang (Graduate School of Natural Science and Technology, Okayama University, Japan), Satoshi Takahashi (Graduate School of Natural Science and Technology, Okayama University, Japan) and Jinglong Wu (Graduate School of Natural Science and Technology, Okayama University, Japan)
DOI: 10.4018/978-1-60960-559-9.ch039
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Abstract

The purpose of this study was to develop a finger display device that has a four-degree-of-freedom (4DOF) length. This device was designed for rehabilitation and cognitive experimentation. The device can change the finger span between the thumb and four fingers, and the distance between digits is controlled by four motors. The positions of each unit, including the motor, are self-adjusted. Adjustments are made after recording the motion of the individual’s hand and analyzing fingertip movement. Each finger is controlled independently, and rehabilitation is performed on each individual finger. The device can be used for not only rehabilitation but also basic tactile studies. In particular, this device provides a valid method to measure length.
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2Dof Length Display Device

The two-length display device using three fingers is shown in Figure 1. This device is used to determine length perception by the thumb and index finger and the thumb and middle finger. As shown in Figure 1, the electric slider, which is installed vertically, is attached to a wooden board (90×20 cm). The electric slider controller locks onto the wooden board. An acrylic disk, which presents the length stimulus to the fingertips of the index finger and the middle finger, controls the length stimulus between the fingertips by being installed at a fixed distance. An aluminum framework supports the acrylic disk. The pressure sensor, which measures the grip of the fingertip, is installed under the aluminum framework. A portable stand containing two sliders can be used to adjust the distance between three acrylic boards during a continuous presentation of length stimuli.

Figure 1.

Two tactile length perception device for three fingers experiments

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