Tactile Localization

Author:

Elithorn Alick1,Piercy Malcolm F.1,Crosskey Margaret A.1

Affiliation:

1. Neurological Research Unit of the Medical Research Council and the Psychological Department, National Hospital, Queen Square, London.

Abstract

Clinical studies suggested that errors of tactile localization made by leucotomized subjects were due to a failure of analysis of a conceptual type. The present experiment examines the normal mechanisms of localizing stimuli to different sites on the hands by measuring the time taken to make a correct response as well as by an analysis of the errors made under conditions of stress (the reaction-time situation). It is demonstrated that healthy subjects of above-average intelligence have appreciable difficulty in determining which of their fingers has been touched. The degree of this difficulty depends on which finger has been stimulated. The results strongly support the hypothesis that normal tactile localization involves the analysis of primary sensory data in terms of a few simple parameters of orientation. It is suggested that some of the errors which occur are due to contamination between different systems of conceptual analysis.

Publisher

SAGE Publications

Subject

General Medicine

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