PATTERN VISUAL-EVOKED POTENTIALS RECORDED FROM HUMAN OCCIPITAL CORTEX WITH CHRONIC SUBDURAL ELECTRODES

被引:42
作者
NOACHTAR, S [1 ]
HASHIMOTO, T [1 ]
LUDERS, H [1 ]
机构
[1] CLEVELAND CLIN FDN, EPILEPSY & SLEEP DISORDERS SECT, CLEVELAND, OH 44106 USA
来源
ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY | 1993年 / 88卷 / 06期
关键词
PATTERN EVOKED POTENTIALS; CORTICAL RECORDINGS; SUBDURAL ELECTRODES;
D O I
10.1016/0168-5597(93)90032-K
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
Pattern evoked potentials to full- and partial-field stimulation were recorded simultaneously from scalp electrodes and from subdural electrodes located over the temporal and occipital cortex, including electrodes placed over or close to the lower lip of the calcarine fissure. High-amplitude pattern evoked potentials were recorded exclusively from electrodes localized in the vicinity of the calcarine fissure and showed a positive-negative deflection in phase with surface recordings, followed by a second negative peak phase reversed with respect to the major surface positive peak (''P100''). The findings suggest that the initial component is an expression of the afferent volley and that the second component (equivalent of the surface ''P100'') is most probably generated as a dipole strictly localized to the visual cortex in close proximity of the calcarine fissure (area 17 and/or area 18).
引用
收藏
页码:435 / 446
页数:12
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