Authors
Jörg Trojan, Dieter Kleinböhl, Annette M Stolle, Ole K Andersen, Rupert Hölzl, Lars Arendt-Nielsen
Publication date
2006/11/20
Journal
Brain research
Volume
1120
Issue
1
Pages
106-113
Publisher
Elsevier
Description
Brain activation patterns derived from neurofunctional methods are often implicitly regarded as being directly related to subjective perceptual experience in an iso- or at least homomorph manner, neglecting the operational differences between these two dimensions. This paper (a) introduces a method for assessing ‘perceptual maps’ of stimulation patterns presented to the body surface, providing a means to parametrically relate neural representation and subjective percept, and (b) applies this method to demonstrate the existence of ‘somatotopic maps’ of hot and painful stimulus patterns independent from mechanoceptive co-activation. Brief (90ms) CO2 laser pulses were presented in an array of multiple stimulation sites on the dorsal forearms (N. radialis area, C7 dermatome) of healthy subjects. Perceived locations were indicated with a 3D tracker without touching the skin, and (mis-)localizations in distal …
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