P50感觉门控与注意力表现。
P50 sensory gating and attentional performance.
作者信息
Wan Li, Friedman Bruce H, Boutros Nash N, Crawford Helen J
机构信息
Department of Psychology, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States.
出版信息
Int J Psychophysiol. 2008 Feb;67(2):91-100. doi: 10.1016/j.ijpsycho.2007.10.008. Epub 2007 Nov 1.
Sensory gating refers to the preattentional filtering of irrelevant sensory stimuli. This process may be impaired in schizotypy, which is a trait also associated with cigarette smoking. This association may in part stem from the positive effects of smoking on sensory gating and attention. The relationship among sensory gating, smoking, schizotypy and attention was examined in 39 undergraduates. Sensory gating was indexed by the P50 suppression paradigm, and attention was measured by the Attention Network Test (ANT) and a Stroop task. Results showed sensory gating to be positively correlated with performances on ANT and Stroop reflected in better alerting, less conflict between stimuli, faster reaction time, and greater accuracy. Smokers showed a pattern of a greater number of significant correlations between sensory gating and attention in comparison to non-smokers, although the relationship between sensory gating and attention was not affected by schizotypy. The majority of significant correlations were found in the region surrounding Cz. These findings are discussed relative to the potential modifying influence of smoking and schizotypy on sensory gating and attention.
感觉门控是指对无关感觉刺激的注意前过滤。这一过程在分裂型人格特质中可能受损，而分裂型人格特质也是一种与吸烟相关的特质。这种关联可能部分源于吸烟对感觉门控和注意力的积极影响。对39名本科生的感觉门控、吸烟、分裂型人格特质和注意力之间的关系进行了研究。感觉门控通过P50抑制范式进行指标化，注意力通过注意力网络测试（ANT）和斯特鲁普任务进行测量。结果显示，感觉门控与ANT和斯特鲁普任务的表现呈正相关，表现为更好的警觉性、刺激之间的冲突更少、反应时间更快和准确性更高。与不吸烟者相比，吸烟者在感觉门控和注意力之间表现出更多显著的相关性模式，尽管感觉门控和注意力之间的关系不受分裂型人格特质的影响。大多数显著相关性出现在Cz周围区域。相对于吸烟和分裂型人格特质对感觉门控和注意力的潜在调节影响，对这些发现进行了讨论。
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