Noachtar S, Hashimoto T, Lüders H
Section of Epilepsy and Sleep Disorders, Cleveland Clinic Foundation, OH 44106.
Electroencephalogr Clin Neurophysiol. 1993 Nov-Dec;88(6):435-46. doi: 10.1016/0168-5597(93)90032-k.
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).
从头皮电极以及位于颞叶和枕叶皮质的硬膜下电极同时记录全视野和半视野刺激诱发的模式电位，这些硬膜下电极包括放置在距状裂下唇上方或附近的电极。高振幅模式诱发电位仅从位于距状裂附近的电极记录到，并且与表面记录同相呈现正 - 负偏转，随后是第二个负峰，其相位相对于主要表面正峰（“P100”）反转。这些发现表明，初始成分是传入冲动的一种表现，而第二个成分（相当于表面的“P100”）很可能是由一个严格局限于距状裂附近视觉皮质（17区和/或18区）的偶极子产生的。
