Sex Differences in Gamma Band Functional Connectivity Between the Frontal Lobe and Cortical Areas During an Auditory Oddball Task, as Revealed by Imaginary Coherence Assessment

Q4 Medicine
T. Fujimoto, E. Okumura, A. Kodabashi, K. Takeuchi, T. Otsubo, Katsumi Nakamura, K. Yatsushiro, M. Sekine, Shinichiro Kamiya, S. Shimooki, T. Tamura
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引用次数: 4

Abstract

We studied sex-related differences in gamma oscillation during an auditory oddball task, using magnetoencephalography and electroencephalography assessment of imaginary coherence (IC). We obtained a statistical source map of event-related desynchronization (ERD) / event-related synchronization (ERS), and compared females and males regarding ERD / ERS. Based on the results, we chose respectively seed regions for IC determinations in low (30-50 Hz), mid (50-100 Hz) and high gamma (100-150 Hz) bands. In males, ERD was increased in the left posterior cingulate cortex (CGp) at 500 ms in the low gamma band, and in the right caudal anterior cingulate cortex (cACC) at 125 ms in the mid-gamma band. ERS was increased in the left rostral anterior cingulate cortex (rACC) at 375 ms in the high gamma band. We chose the CGp, cACC and rACC as seeds, and examined IC between the seed and certain target regions using the IC map. IC changes depended on the height of the gamma frequency and the time window in the gamma band. Although IC in the mid and high gamma bands did not show sex-specific differences, IC at 30-50 Hz in males was increased between the left rACC and the frontal, orbitofrontal, inferior temporal and fusiform target regions. Increased IC in males suggested that males may acomplish the task constructively, analysingly, emotionally, and by perfoming analysis, and that information processing was more complicated in the cortico-cortical circuit. On the other hand, females showed few differences in IC. Females planned the task with general attention and economical well-balanced processing, which was explained by the higher overall functional cortical connectivity. CGp, cACC and rACC were involved in sex differences in information processing and were likely related to differences in neuroanatomy, hormones and neurotransmitter systems.
脑皮层和额叶伽马带功能连通性的性别差异——基于想象连贯性评估
我们利用脑磁图和脑电图对想象连贯性(IC)进行评估,研究了听觉怪球任务中伽马振荡的性别差异。我们获得了事件相关去同步(ERD) /事件相关同步(ERS)的统计源图,并比较了女性和男性在ERD / ERS方面的差异。根据结果,我们分别选择了低(30-50 Hz)、中(50-100 Hz)和高(100-150 Hz)频段的IC测定种子区域。在男性中,低伽马带500 ms时左扣带后皮层(CGp)的ERD增加,中伽马带125 ms时右扣带前尾皮层(cACC)的ERD增加。在高伽马波段375 ms时,左吻侧前扣带皮层(rACC)的ERS增加。我们选择了CGp、cACC和rACC作为种子,并使用IC图检测了种子与特定目标区域之间的IC。IC的变化取决于伽马频率的高度和伽马波段的时间窗。虽然中、高伽马波段的IC没有性别差异,但男性左rACC与额、眶额、下颞和梭状回靶区之间30-50 Hz的IC增加。男性IC的增加表明,男性可以建设性地、分析性地、情绪化地、通过分析来完成任务,并且皮质-皮质回路中的信息处理更为复杂。另一方面,女性在IC方面的差异不大。女性以一般的注意力和经济均衡的加工计划任务,这可以解释为更高的整体功能皮质连通性。CGp、cACC和rACC参与了信息处理的性别差异,可能与神经解剖学、激素和神经递质系统的差异有关。
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来源期刊
Open Neuroimaging Journal
Open Neuroimaging Journal Medicine-Radiology, Nuclear Medicine and Imaging
CiteScore
0.70
自引率
0.00%
发文量
3
期刊介绍: The Open Neuroimaging Journal is an Open Access online journal, which publishes research articles, reviews/mini-reviews, and letters in all important areas of brain function, structure and organization including neuroimaging, neuroradiology, analysis methods, functional MRI acquisition and physics, brain mapping, macroscopic level of brain organization, computational modeling and analysis, structure-function and brain-behavior relationships, anatomy and physiology, psychiatric diseases and disorders of the nervous system, use of imaging to the understanding of brain pathology and brain abnormalities, cognition and aging, social neuroscience, sensorimotor processing, communication and learning.
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