Theta and alpha oscillations during working-memory maintenance predict successful long-term memory encoding

Khader, Patrick H.; Jost, Kerstin; Ranganath, Charan; Rösler, Frank

doi:10.1016/j.neulet.2009.11.028

Cited by 174 publications

(150 citation statements)

References 39 publications

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“…Related results have been found in an EEG study using letter strings and line drawings as memory items [Khader et al, 2010]. Other studies found a decrease in alpha activity during presentation of the stimuli to correlate with successful encoding in LTM [Hanslmayr et al, 2009;Klimesch et al, 1996b;Sederberg et al, 2007;Weiss and Rappelsberger, 2000].…”

Section: Discussionsupporting

confidence: 69%

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Increase in posterior alpha activity during rehearsal predicts successful long‐term memory formation of word sequences

Meeuwissen

Takashima

Fernández

et al. 2010

Human Brain Mapping

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It is becoming increasingly clear that demanding cognitive tasks rely on an extended network engaging task-relevant areas and, importantly, disengaging task-irrelevant areas. Given that alpha activity (8-12 Hz) has been shown to reflect the disengagement of task-irrelevant regions in attention and working memory tasks, we here ask if alpha activity plays a related role for long-term memory formation. Subjects were instructed to encode and maintain the order of word sequences while the ongoing brain activity was recorded using magnetoencephalography (MEG). In each trial, three words were presented followed by a 3.4 s rehearsal interval. Considering the good temporal resolution of MEG this allowed us to investigate the word presentation and rehearsal interval separately. The sequences were grouped in trials where word order either could be tested immediately (working memory trials; WM) or later (LTM trials) according to instructions. Subjects were tested on their ability to retrieve the order of the three words. The data revealed that alpha power in parieto-occipital regions was lower during word presentation compared to rehearsal. Our key finding was that parieto-occipital alpha power during the rehearsal period was markedly stronger for successfully than unsuccessfully encoded LTM sequences. This subsequent memory effect demonstrates that high posterior alpha activity creates an optimal brain state for successful LTM formation possibly by actively reducing parieto-occipital activity that might interfere with sequence encoding.

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Section: Discussionsupporting

confidence: 69%

“…In particular, increased alpha activity in task-irrelevant regions was related to optimal performance in a somatosensory working memory task [Haegens et al, 2009]. A recent EEG study reported stronger alpha activity associated with LTM encoding of objects and letter strings [Khader et al, 2010].…”

Section: Introductionmentioning

confidence: 95%

Increase in posterior alpha activity during rehearsal predicts successful long‐term memory formation of word sequences

Meeuwissen

Takashima

Fernández

et al. 2010

Human Brain Mapping

View full text Add to dashboard Cite

show abstract

“…Indeed, as Takashima et al (2006) concluded from an MEG study of the encoding of complex scenes, working memory processes associated with deep perceptual and semantic processing appear to act in tandem with top-down modulation of contextually constrained visual perception to promote successful declarative memory formation. This notion of continuously interacting memory systems is also consistent with the role of oscillatory phase synchronization between different brain regions in supporting interactions between working memory and long-term memory storage (Fell and Axmacher, 2011; see also Khader et al, 2010). We propose that these emerging ideas suggest that 'tuning up' perceptual and semantic processing and working memory capacity through implicit learning and/or repetitive practice may be the optimal approach to fixing broken explicit learning and memory systems in neuropsychiatrically impaired brains.…”

Section: Cognitive Training Must Focus On Implicit Learning Mechanismssupporting

confidence: 72%

Cognitive Training for Impaired Neural Systems in Neuropsychiatric Illness

Vinogradov

Fisher

Villers-Sidani

2011

Neuropsychopharmacol

281

209

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Neuropsychiatric illnesses are associated with dysfunction in distributed prefrontal neural systems that underlie perception, cognition, social interactions, emotion regulation, and motivation. The high degree of learning-dependent plasticity in these networksFcombined with the availability of advanced computerized technologyFsuggests that we should be able to engineer very specific training programs that drive meaningful and enduring improvements in impaired neural systems relevant to neuropsychiatric illness. However, cognitive training approaches for mental and addictive disorders must take into account possible inherent limitations in the underlying brain 'learning machinery' due to pathophysiology, must grapple with the presence of complex overlearned maladaptive patterns of neural functioning, and must find a way to ally with developmental and psychosocial factors that influence response to illness and to treatment. In this review, we briefly examine the current state of knowledge from studies of cognitive remediation in psychiatry and we highlight open questions. We then present a systems neuroscience rationale for successful cognitive training for neuropsychiatric illnesses, one that emphasizes the distributed nature of neural assemblies that support cognitive and affective processing, as well as their plasticity. It is based on the notion that, during successful learning, the brain represents the relevant perceptual and cognitive/affective inputs and action outputs with disproportionately larger and more coordinated populations of neurons that are distributed (and that are interacting) across multiple levels of processing and throughout multiple brain regions. This approach allows us to address limitations found in earlier research and to introduce important principles for the design and evaluation of the next generation of cognitive training for impaired neural systems. We summarize work to date using such neuroscience-informed methods and indicate some of the exciting future directions of this field.

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“…The study found statistically significant higher brainwave activity in the beta, delta, and gamma bands for 2D images and in the alpha and theta bands during 3D projection. It has previously been reported that activity in the theta and alpha bands is indicative of global information transfer and relates to memory function, attention, and decisionmaking 15,16 . It may be that the human brain interprets 2D and perspective 3D images similarly, but differently to projected 3D, as they are dependent on stereopsis.…”

Section: Discussionmentioning

confidence: 99%

A study to evaluate the reliability of using two-dimensional photographs, three-dimensional images, and stereoscopic projected three-dimensional images for patient assessment

Zhu

Khambay

2017

International Journal of Oral and Maxillofacial Surgery

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Clinicians are accustomed to viewing conventional two-dimensional (2D) photographs and assume that viewing three-dimensional (3D) images is similar.Facial images captured in 3D are not viewed in true 3D; this may alter clinical judgement. The aim of this study was to evaluate the reliability of using conventional photographs, 3D images, and stereoscopic projected 3D images to rate the severity of the deformity in pre-surgical class III patients. Forty adult patients were recruited.Eight raters assessed facial height, symmetry, and profile using the three different viewing media and a 100-mm visual analogue scale (VAS), and appraised the most informative viewing medium. Inter-rater consistency was above good for all three media. Intra-rater reliability was not significantly different for rating facial height using 2D (P = 0.704), symmetry using 3D (P = 0.056), and profile using projected 3D (P = 0.749). Using projected 3D for rating profile and symmetry resulted in significantly lower median VAS scores than either 3D or 2D images (all P < 0.05).For 75% of the raters, stereoscopic 3D projection was the preferred method for rating.The reliability of assessing specific characteristics was dependent on the viewing medium. Clinicians should be aware that the visual information provided when viewing 3D images is not the same as when viewing 2D photographs, especially for facial depth, and this may change the clinical impression.

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Theta and alpha oscillations during working-memory maintenance predict successful long-term memory encoding

Cited by 174 publications

References 39 publications

Increase in posterior alpha activity during rehearsal predicts successful long‐term memory formation of word sequences

Increase in posterior alpha activity during rehearsal predicts successful long‐term memory formation of word sequences

Cognitive Training for Impaired Neural Systems in Neuropsychiatric Illness

A study to evaluate the reliability of using two-dimensional photographs, three-dimensional images, and stereoscopic projected three-dimensional images for patient assessment

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