V Nikouline1, J Ruohonen, R J Ilmoniemi. 1. BioMag Laboratory, Medical Engineering Centre, Helsinki University Central Hospital, Finland. vadim@biomag.helsinki.fi
Abstract
OBJECTIVE: We have used EEG to measure effects of air- and bone-conducted sound from the coil in transcranial magnetic stimulation (TMS). METHODS: Auditory-evoked potentials to TMS were recorded in three different experimental conditions: (1) the coil 2 cm above the head, (2) the coil 2 cm above the head but rigidly connected by a plastic piece to the scalp, (3) the coil pressed against the scalp over the motor cortex. RESULTS: The acoustical click from the TMS coil evoked large auditory potentials, whose amplitude depended critically on the mechanical contact of the coil with the head. CONCLUSION: Both air- and bone-conducted sounds have to be taken into account in the design and interpretation of TMS experiments.
OBJECTIVE: We have used EEG to measure effects of air- and bone-conducted sound from the coil in transcranial magnetic stimulation (TMS). METHODS: Auditory-evoked potentials to TMS were recorded in three different experimental conditions: (1) the coil 2 cm above the head, (2) the coil 2 cm above the head but rigidly connected by a plastic piece to the scalp, (3) the coil pressed against the scalp over the motor cortex. RESULTS: The acoustical click from the TMS coil evoked large auditory potentials, whose amplitude depended critically on the mechanical contact of the coil with the head. CONCLUSION: Both air- and bone-conducted sounds have to be taken into account in the design and interpretation of TMS experiments.
Authors: Marcello Massimini; Fabio Ferrarelli; Steve K Esser; Brady A Riedner; Reto Huber; Michael Murphy; Michael J Peterson; Giulio Tononi Journal: Proc Natl Acad Sci U S A Date: 2007-05-04 Impact factor: 11.205
Authors: Xiaoming Du; Fow-Sen Choa; Ann Summerfelt; Laura M Rowland; Joshua Chiappelli; Peter Kochunov; L Elliot Hong Journal: Exp Brain Res Date: 2016-09-14 Impact factor: 1.972