Electrotactile stimulation on the tongue: intensity perception, discrimination and cross-modality estimation
Identifieur interne : 001030 ( Pmc/Corpus ); précédent : 001029; suivant : 001031Electrotactile stimulation on the tongue: intensity perception, discrimination and cross-modality estimation
Auteurs : Cecil A. Lozano ; Kurt A. Kaczmarek ; Marco SantelloSource :
- Somatosensory & motor research [ 0899-0220 ] ; 2009.
Abstract
Due to its high sensitivity and conductivity, electrotactile stimulation (ETS) on the tongue has proven to be a useful and technically convenient tool to substitute and/or augment sensory capabilities. However, most of its applications have only provided spatial attributes and little is known about (a) the ability of the tongue's sensory system to process electrical stimuli of varying magnitudes and (b) how modulation of ETS intensity affects subjects' ability to decode stimulus intensity. We addressed these questions by quantifying: (1) the magnitude of the dynamic range (DR; maximal comfortable intensity/perception threshold) and its sensitivity to prolonged exposure; (2) subjects' ability to perceive intensity changes; and (3) subjects' ability to associate intensity with angular excursions of a protractor's handle. We found that the average DR (17 dB) was generally large in comparison with other tactile loci and of a relatively constant magnitude among subjects, even after prolonged exposure, despite a slight but significant upward drift (
Url:
DOI: 10.1080/08990220903158797
PubMed: 19697262
PubMed Central: 2839388
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