Normative variation of P3a and P3b from a large sample - Gender, topography, and response time
Normative variation of P3a and P3b from a large sample - Gender, topography, and response time
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DOI：
10.1027/0269-8803.21.1.22
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发表时间：
2007-01-01
影响因子：
1.3
通讯作者：
Polich, John
中科院分区：
文献类型：
--
作者：
Conroy, Matthew A.;Polich, John
P3a和P3b成分被引出在120（60名女性，60名男性）年轻的成年人使用视觉三刺激事件相关脑电位（ERP）oddball范式，其中受试者响应于一个罕见的目标。本文的主要目的是提供一个统计学上强有力的表征这些相关的P300子组件。P3a成分是从不常出现的分心物刺激中获得的，分心物刺激是一个大的蓝色正方形。从目标刺激获得P3b成分，该目标刺激是直径与标准刺激蓝色圆略有不同的蓝色圆。振幅的措施表明，P3a是最大的Cz，P3b是最大的Pz，潜伏期措施增加，从额叶到顶叶记录网站的潜力。P3a和P3b在女性比男性更大和更晚，具有地形和明显的个体差异性。P3a通常与反应时间无关。P3b波幅在右额区与P3b潜伏期呈负相关，在右顶叶区与反应时呈正相关。理论影响进行了讨论。
The P3a and P3b components were elicited in 120 (60 females, 60 males) young adults using a visual three-stimulus event-related brain potential (ERP) oddball paradigm in which subjects responded to an infrequent target. The major purpose of the paper was to provide a statistically strong characterization of these related P300 subcomponents. P3a components were obtained from the infrequently presented distracter stimulus, which was a large blue square. P3b components were obtained from the target stimulus, which was a blue circle that differed slightly in diameter from the standard stimulus blue circle. Amplitude measures demonstrated that P3a was maximum at Cz, and P3b was maximum at Pz; latency measures increased for both potentials from frontal to parietal recording sites. P3a and P3b from females were larger and later than those from male subjects, with topographic and appreciable individual difference variability observed. P3a was generally unrelated to response time. P3b amplitude was negatively correlated over right frontal areas with P3b latency and positively correlated over right parietal areas to response time. Theoretical implications are discussed.