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Dissociating the Neural Correlates of Item and Context Memory: An ERP Study of Face Recognition
"... We investigated the neural correlates of item and context retrieval using event-related potentials (ERPs). Particpants studied unfamiliar faces with happy or neutral expressions, and at test, they decided whether test faces were studied in the same or in a different expression, or were new. The pari ..."
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We investigated the neural correlates of item and context retrieval using event-related potentials (ERPs). Particpants studied unfamiliar faces with happy or neutral expressions, and at test, they decided whether test faces were studied in the same or in a different expression, or were new. The parietal ERP effect, which is hypothesized to indirectly reflect medial-temporal lobe (MTL) function, was sensitive to item retrieval, whereas the frontal ERP effect, which is thought to reflect prefrontal cortex (PFC) function, was sensitive to context retrieval. Converging with lesion, functional neuroimaging (PET and fMRI), and ERP evidence, these results support the notion that item retrieval is primarily associated with MTL function whereas context retrieval is primarily associated by PFC function.
Neuromagnetic activity during recognition of emotional pictures
- Brain Topography
, 2008
"... Abstract Recently studied 'old ' stimuli lead to larger frontal and parietal ERP responses than 'new ' stimuli. The present experiment investigated the neuromagnetic corre-lates (MEG) of this 'old-new ' effect and its modulation by emotional stimulus content. Highly aro ..."
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Abstract Recently studied 'old ' stimuli lead to larger frontal and parietal ERP responses than 'new ' stimuli. The present experiment investigated the neuromagnetic corre-lates (MEG) of this 'old-new ' effect and its modulation by emotional stimulus content. Highly arousing pleasant, highly arousing unpleasant and un-arousing neutral pho-tographs were presented to the participants with the instruction to memorize them. They were later re-presented together with new photographs in an old-new decision task. In line with previous ERP studies, a long-lasting old-new effect (350-700 ms) was found. Independently, an emotion effect also occurred, as reflected in a, particularly left temporal, activity increase for emotional pictures between 450 and 580 ms. Moreover, only for the pleasant pictures did the early part of the old-new effect, which is thought to reflect familiarity based recognition processes, interact with picture content: The old-new effect for pleasant pic-tures in frontal regions was larger than the one for neutral or unpleasant pictures between 350 and 450 ms. In parallel, subjects ' responses were accelerated towards and biased in favour of classifying pleasant pictures as old. However, when false alarm rate was taken into account, there was no significant effect of emotional content on recognition accuracy. In sum, this MEG study demonstrates an effect of particularly pleasant emotional content on recognition f!1emory which may be mediated by a familiarity based process.
Younger and Older Adults
"... oti onal M em ory in Younger and O lder A dults Sandra J. E. Langeslag UITNODIGING Graag nodig ik u uit voor het bijwonen van de openbare verdediging van mijn proefschrift Emotional Memory in ..."
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oti onal M em ory in Younger and O lder A dults Sandra J. E. Langeslag UITNODIGING Graag nodig ik u uit voor het bijwonen van de openbare verdediging van mijn proefschrift Emotional Memory in
on attentional scope
"... arousal per se account for the influence of appetitive stimuli ..."
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BRIEF REPORTS Late Positive Potential to Appetitive Stimuli and Local Attentional Bias
"... Predicated on the idea that positive affects high in approach motivation are crucial in goal-directed behaviors, research has found that these positive affects cause narrowed attention. The present research was designed to investigate a possible neurophysiological underpinning of this effect. Previo ..."
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Predicated on the idea that positive affects high in approach motivation are crucial in goal-directed behaviors, research has found that these positive affects cause narrowed attention. The present research was designed to investigate a possible neurophysiological underpinning of this effect. Previous research has suggested that the late positive potential (LPP) of the event-related brain potential is increased by emotionally arousing stimuli because of the attention-grabbing nature of such stimuli. Other research has suggested that left prefrontal cortical regions are associated with narrowed attention and approach-motivated affect. Integrating these two lines of evidence, the present research examined LPPs to appetitive versus neutral pictures and assessed the relationship of these LPPs to local versus global attentional bias following the picture primes. Results revealed that appetitive in comparison with neutral pictures evoked larger LPP amplitudes bilaterally over central and parietal regions and asymmetrically over frontal regions. Moreover, these LPP amplitudes to appetitive pictures predicted greater locally biased attention caused by the appetitive pictures. These results provide the first evidence that LPPs are associated with the local attentional bias induced by appetitive motivation.
Contents lists available at ScienceDirect Biological PsychologyReview
"... The role of asymmetric frontal cortical activity in emotion-related phenomena: ..."
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The role of asymmetric frontal cortical activity in emotion-related phenomena:
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"... Contributions from research on anger and cognitive dissonance to understanding the motivational functions of asymmetrical frontal brain activity ..."
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Contributions from research on anger and cognitive dissonance to understanding the motivational functions of asymmetrical frontal brain activity
Artificial Neural Networks as Analytic Tools in an ERP Study of Face Memory
, 2003
"... Abstract- Despite inquiry, the existence of early event-related potential (ERP) correlates of face memory has yet to be confirmed. We investigated the possibility that such correlates exist but cannot be reliably detected by linear analysis. We compared the abilities of artificial neural networks (A ..."
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Abstract- Despite inquiry, the existence of early event-related potential (ERP) correlates of face memory has yet to be confirmed. We investigated the possibility that such correlates exist but cannot be reliably detected by linear analysis. We compared the abilities of artificial neural networks (ANN’s) and ANOVA in classifying ERP’s from right temporal areas elicited by recognized and novel faces. ANOVA’s were unable to distinguish between ERP types; however, ANN’s were. Results suggest that early ERP’s recorded over right areas do index memory related activity, but that this activity is in the form of higher-order relationships between voltage and time. Wiretapping revealed that classification was achieved through coarse coding in the hidden units and that a subset of timepoints seemed to be driving their activity. Although much remains to be resolved, these preliminary results provide support for early face memory effects and attest to the utility of ANN’s in ERP analysis.
