Author/Editor		Deecke, L; Beisteiner, R
Title		MEG-FMRI in motor function
Type		članek
Source		In: Stalberg EV, de Weerd AW, Zidar J, editors. ECCN 98. 9th European congress of clinical neurophysiology; 1998 Jun 4-7; Ljubljana. Bologna: Monduzzi Editore,
Publication year		1998
Volume		str. 75-80
Language		eng
Abstract		The magnetoencephalographic technique and the functional magnetic resonance imaging technique were employed together in experiments investigating voluntary movement function. The MEG techniqe allows localisation of equivalent current dipoles in an event-related manner, referred to here as the 'neuronal signal' and has been employed by our group since 1982 (Deecke et al. 1982, 1983; Cheyne et al. 1991). The FMRI technique allows the measurement of activation-related cerebral blood flow changes occuring with specific tasks, referred to as the 'cerebrovascular signal.' The same Ss participated in experiments using similar experimental designs, and data from both the MEG and the FMRI have been recorded. Spatialcoincidence between methods was fair but not 100%. The disagrement is perhaps not only of a technicalnature (inaccuracy, etc.) but inherent to the physiological differences between the two signals: Maybe it is a priori not be expected that the neuronal signal and the cerebrovascular signal exactly match in localization.
Descriptors		MAGNETOENCEPHALOGRAPHY MAGNETIC RESONANCE IMAGING BRAIN MAPPING