Pneumatic evoked potential. Sensory or auditive potential?
Résumé
In this study, evoked potentials (EPs) to a pneumatic, innocuous, and calibrated stimulation of the skin were recorded in 22 volunteers. A reproducible EP was recorded in 18 out of 22 subjects (82% of cases) with a mean latency of about 120-130 ms, and maximal amplitude at Cz. This EP actually consisted of two components, an auditory and a somatosensory one. Indeed, it was significantly decreased in amplitude, but did not disappear, when the noise generated by the air-puff was masked. We also verified that a stimulation close to the skin but not perceived by the subject was not associated with any EP. Conduction velocity between hand and shoulder was calculated around 25 m/s. This preliminary study demonstrates that pneumatic EPs can be recorded in normal volunteers.
Origine : Fichiers produits par l'(les) auteur(s)
Licence : Domaine public
Licence : Domaine public