A comparison of the emitted late positive potential in older and young adults.
A comparison of the emitted late positive potential in older and young adults.
复制标题
老年人和年轻人发出的晚期正电位的比较。
DOI：
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发表时间：
1982
期刊：
影响因子：
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通讯作者：
L. Thompson
中科院分区：
文献类型：
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作者：
H. Michalewski;J. Patterson;T. E. Bowman;D. K. Litzleman;L. Thompson
一个发射的电位范例被用来调查P3头皮电位在一组老年人（M = 66.8岁）和一组年轻人（M = 22.0岁）。由于没有物理刺激是必要的，以引起一个发射的潜力，年龄比较P3可以不依赖于正常的感觉传输通道。传统的和延迟校正的平均缺失的听觉点击分析电极放置在中线额叶，中央和顶叶的位置。结果表明，虽然头皮分布的发射电位是相似的两个年龄组，振幅在Pz和Cz显着较小的老年组。潜伏期校正电位显示类似的趋势，但没有达到显着水平。对于传统或校正的平均值，N2或P3潜伏期均未观察到组间差异。研究结果支持P3成分的振幅的年龄差异，并表明，当P3不同步的感觉事件，在这个组成部分的lavidine可能不敏感的年龄差异。
An emitted potential paradigm was used to investigate P3 scalp potentials in a group of older individuals (M = 66.8 years) and a group of younger persons (M = 22.0 years). Since no physical stimulus is necessary to elicit an emitted potential, an age comparison of P3 can be made which does not depend on normal sensory transmission channels. Both traditional and latency corrected averages to missing auditory clicks were analyzed from electrodes placed over midline frontal, central, and parietal locations. Results indicated that while the scalp distribution of emitted potentials was similar for both age groups, amplitudes at Pz and Cz were significantly smaller in the older group. Latency corrected potentials indicated similar trends but did not reach significant levels. No group differences were seen for N2 or P3 latencies for either traditional or corrected averages. The findings support age differences in the amplitudes of the P3 component and suggest that when P3 is not synchronized with a sensory event, latencies in this component may not be sensitive to age differences.