Gustatory evoked magnetic fields in humans.
Magnetic fields evoked by taste stimuli of the human tongue were measured over the whole head using a helmet-shaped 64 channel magnetoencephalography system in five normal subjects. The stimuli were 10% glucose and 0.3 M NaCl solutions and distilled water. The most prominent peak (N175m) appearing over the bilateral hemispheres had a latency of 150-210 ms. The N175m sources were located using a two-dipole model in a spherical conducting medium based on the individual head dimensions and superimposed on magnetic resonance images. The N175m dipoles due to 10% glucose and 0.3 M NaCl stimuli were located at the operculum and circum-insular areas in both hemispheres, but those due to distilled water could not be located accurately.
Murayama
N
N
Department of Electrical Engineering and Computer Science, Faculty of Engineering, Kumamoto University, Japan. murayama@eecs.kumamoto-u.ac.jp
Nakasato
N
N
Hatanaka
K
K
Fujita
S
S
Igasaki
T
T
Kanno
A
A
Yoshimoto
T
T
D000328:Adult; D001931:Brain Mapping; D002540:Cerebral Cortex / Q000502:physiology*; D005073:Evoked Potentials, Somatosensory / Q000502:physiology*; D006801:Humans; D015225:Magnetoencephalography; D008297:Male; D013649:Taste / Q000502:physiology*; D014059:Tongue / Q000294:innervation / Q000502:physiology