The influence of imagery vividness and internally-directed attention on the neural mechanisms underlying the encoding of visual mental images into episodic memory

Author:

Gjorgieva Eva12,Geib Benjamin R12,Cabeza Roberto12,Woldorff Marty G132

Affiliation:

1. Department of Psychology and Neuroscience , Duke University, Durham, NC 27708 , United States

2. Center for Cognitive Neuroscience , Duke Institute for Brain Sciences, Duke University, Durham, NC 27708 , United States

3. Department of Psychiatry , Duke University, Durham, NC 27708 , United States

Abstract

Abstract Attention can be directed externally toward sensory information or internally toward self-generated information. Using electroencephalography (EEG), we investigated the attentional processes underlying the formation and encoding of self-generated mental images into episodic memory. Participants viewed flickering words referring to common objects and were tasked with forming visual mental images of the objects and rating their vividness. Subsequent memory for the presented object words was assessed using an old–new recognition task. Internally-directed attention during image generation was indexed as a reduction in steady-state visual evoked potentials (SSVEPs), oscillatory EEG responses at the frequency of a flickering stimulus. The results yielded 3 main findings. First, SSVEP power driven by the flickering word stimuli decreased as subjects directed attention internally to form the corresponding mental image. Second, SSVEP power returned to pre-imagery baseline more slowly for low- than high-vividness later remembered items, suggesting that longer internally-directed attention is required to generate subsequently remembered low-vividness images. Finally, the event-related-potential difference due to memory was more sustained for subsequently remembered low- versus high-vividness items, suggesting that additional conceptual processing may have been needed to remember the low-vividness visual images. Taken together, the results clarify the neural mechanisms supporting the encoding of self-generated information.

Publisher

Oxford University Press (OUP)

Subject

Cellular and Molecular Neuroscience,Cognitive Neuroscience

Reference63 articles.

1. Attention facilitates multiple stimulus features in parallel in human visual cortex;Andersen;Curr Biol,2008

2. Tracking the allocation of attention in visual scenes with steady-state evoked potentials;Andersen;Cogn Neurosci Atten,2011

3. The decoupled mind: mind-wandering disrupts cortical phase-locking to perceptual events;Baird;J Cogn Neurosci,2014

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