[Human's magnetoencephalography and normal value of auditory evoked magnetic field evoked by tone burst].
In magnetic shield room, 9 normal subjects were measured by magnetoencephalography (MEG) and auditory evoked magnetic field (AMF) with superconducting quantum device (SQUID). In our experiment, the magnitudes of MEG were between +100 fT and -100 fT and an AMF evoked with 1 kHz tone burst had 8 stable waves. The main waves were N2, P3, N3 with latencies 65, 118, 175 ms and magnitudes -13, +15, -12 fT. The latencies of waves showed small deviations. The magnitudes of waves were about +/- 15 fT. We also found that the two lateral records of countralateral AMFs have revert waveforms in the last two subjects.
Li
K
K
Department of Otolaryngology, Peking Union Hospital, Beijing.
Wang
Z
Z
Cao
K
K
D000293:Adolescent; D000328:Adult; D001301:Audiometry, Pure-Tone / Q000379:methods; D001931:Brain Mapping; D005260:Female; D006801:Humans; D015225:Magnetoencephalography; D008297:Male; D013702:Temporal Lobe / Q000502:physiology*