Electrophysiological correlates of object-repetition effects: sLORETA imaging with 64-channel EEG and individual MRI

Abstract

BackgroundWe investigated the electrophysiological correlates of object-repetition effects using an object categorization task, standardized low-resolution electromagnetic tomography (sLORETA), and individual magnetic resonance imaging. Sixteen healthy adults participated, and a total of 396 line drawings of living and non-living objects were used as stimuli. Of these stimuli, 274 were presented only once, and 122 were repeated after one to five intervening pictures. Participants were asked to categorize the objects as living or non-living things by pressing one of two buttons.ResultsThe old/new effect (i.e., a faster response time and more positive potentials in response to repeated stimuli than to stimuli initially presented) was observed at 350-550 ms post-stimulus. The distributions of cortical sources for the old and new stimuli were very similar at 250-650 ms after stimulus-onset. Activation in the right middle occipital gyrus/cuneus, right fusiform gyrus, left superior temporal gyrus, and right inferior frontal gyrus was significantly reduced in response to old compared with new stimuli at 250-350, 350-450, 450-550, and 550-650 ms after stimulus-onset, respectively. Priming in response time was correlated with the electrophysiological priming at left parietal area and repetition suppression at left superior temporal gyrus in 450-550 ms.ConclusionsThese results suggest processing of repeated objects is facilitated by sharpening perceptual representation and by efficient detection or attentional control of repeated objects.

Repeated Exposure to “meaningless” Pseudowords Modulates LPC, but Not N(FN)400

“…Further to previous studies related to repetition effects of new stimuli, novel and complementary data were obtained by means of topographical and neural source analyses. A covariance map showed changes in LPC caused by the repetition of pseudowords to be compatible with probable neural sources in the left inferior frontal gyrus, left superior temporal gyrus and right superior frontal gyrus, consistent with other studies examining the neural sources of LPC modulations by repetition effects (Kim et al 2006(Kim et al , 2012Taha and Khateb 2013). Interestingly, these regions have traditionally been related to phonological and control processes and are thought to be involved in the use of the grapheme-to-phoneme recoding mechanism (G-P), responsible for reading low-familiarity stimuli like pseudowords (Herbster et al 1997;Joubert et al 2004;Newman and Twieg 2001;Price 1998;Rumsey et al 1997;Levy et al 2009;Juphard et al 2011;Ripamonti et al 2014).…”

Timing of repetition suppression of event‐related potentials to unattended objects

“…Typically, most studies focused the analysis on a preselected set of electrodes and confined amplitude measurements to time windows either based on visual inspection of the data or on previous reports in the literature. Furthermore, previous studies often investigated brain responses only to the first repetition relative to the initial presentation, thus, ignoring the dynamics of brain responses to further repetitions (Andrade, Butler, Mercier, Molholm, & Foxe, 2015; Eddy, Schmid, & Holcomb, 2006; Gilbert, Gotts, Carver, & Martin, 2010; Gosling, Thoma, de Fockert, & Richardson‐Klavehn, 2016; Gruber, Giabbiconi, Trujillo‐Barreto, & Muller, 2006; Gruber & Muller, 2006; Guillaume et al., 2009; Henson, Rylands, Ross, Vuilleumeir, & Rugg, 2004; Kim, Jang, Che, Kim, & Im, 2012; Schendan & Kutas, 2003). The aim of the current study was to determine the time course and scalp distribution of repetition effects without prior hypotheses about the dynamics (RS vs. RE), time course, or scalp distribution of repetition effects.…”

The Modulation of Stimulus Presentation and Lag Length on Repetition Priming of Pictures

“…刺激较先前呈现刺激的正确率更高、反应速度更快，两类刺激反应结果的差异即为启动效应(priming effect) (Kessler & Mosovitch, 2013;Kristjánsson & Campana, 2010)。 根据首次呈现刺激(也称非启动刺激)与再 次呈现刺激(也称启动刺激)的一致程度可将启动分为重复启动(repetition priming)和间接启动(indirect priming) (Kessler & Moscovitch, 2013;McDonald et al, 2010)。其中，当非启动刺激与启动刺激一致时，两 类刺激的结果差异称为重复启动效应(repetition priming effect) (Kessler & Mosovitch, 2013;Schweinberger & Neumann, 2016 (Daelli, 2011;Dörr et al, 2011;Kessler & Mosovitch, 2013;Klaver, Schanaidt, Fell, Ruhlmann, Elger, & Fernández, 2007;Schweinberger & Neumann, 2016; 付乔，张瑞卿，吴苑颖，聂爱情，朱晓磊，张德林，2015)。例如，名 人面孔比非名人面孔的重复启动效应更强 (Dörr et al, 2011;Schweinberger & Neumann, 2016)，词比非词的重复启动效应更强 et al, 2012;Dörr et al, 2011;Heusser et al, 2013;Kessler & Mosovitch, 2013;Schweinberger & Neumann, 2016 …”