SPATIOTEMPORAL SOURCE MODELING OF EVOKED-POTENTIALS TO ACOUSTIC AND COCHLEAR IMPLANT STIMULATION

被引:30
作者
PONTON, CW [1 ]
DON, M [1 ]
WARING, MD [1 ]
EGGERMONT, JJ [1 ]
MASUDA, A [1 ]
机构
[1] UNIV CALGARY,DEPT PSYCHOL,BEHAV NEUROSCI RES GRP,CALGARY T2N 1N4,AB,CANADA
来源
ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY | 1993年 / 88卷 / 06期
关键词
AUDITORY EVOKED POTENTIALS (AEPS); DIPOLE SOURCE POTENTIALS; SPATIOTEMPORAL DIPOLE MODEL; AUDITORY CORTEX;
D O I
10.1016/0168-5597(93)90037-P
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
Spatio-temporal source modeling (STSM) of event-related potentials was used to estimate the loci and characteristics of cortical activity evoked by acoustic stimulation in normal hearing subjects and by electrical stimulation in cochlear implant (CI) subjects. In both groups of subjects, source solutions obtained for the N-1/P-2 complex were located in the superior half of the temporal lobe in the head model. Results indicate that it may be possible to determine whether stimulation of different implant channels activates different regions of cochleotopically organized auditory cortex. Auditory system activation can be assessed further by examining the characteristics of the source wave forms. For example, subjects whose cochlear implants provided auditory sensations and normal bearing subjects had similar source activity. In contrast, a subject in whom implant activation evoked eyelid movements exhibited different source wave forms. STSM analysis may provide an electrophysiological technique for guiding rehabilitation programs based on the capabilities of the individual implant user and for disentangling the complex response patterns to electrical stimulation of the brain.
引用
收藏
页码:478 / 493
页数:16
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