Visual Short-Term Memory for Coherent and Sequential Motion: A rTMS Investigation

We investigated the role of the human medio-temporal complex (hMT+) in the memory encoding and storage of a sequence of four coherently moving random dot kinematograms (RDKs), by applying repetitive transcranial magnetic stimulation (rTMS) during an early or late phase of the retention interval. Mor...

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Autores principales: Andrea Pavan, Filippo Ghin, Gianluca Campana
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Publicado: MDPI AG 2021
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spelling oai:doaj.org-article:7ebca7ba0107451790c92ca9d484c82f2021-11-25T16:57:59ZVisual Short-Term Memory for Coherent and Sequential Motion: A rTMS Investigation10.3390/brainsci111114712076-3425https://doaj.org/article/7ebca7ba0107451790c92ca9d484c82f2021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3425/11/11/1471https://doaj.org/toc/2076-3425We investigated the role of the human medio-temporal complex (hMT+) in the memory encoding and storage of a sequence of four coherently moving random dot kinematograms (RDKs), by applying repetitive transcranial magnetic stimulation (rTMS) during an early or late phase of the retention interval. Moreover, in a second experiment, we also tested whether disrupting the functional integrity of hMT+ during the early phase impaired the precision of the encoded motion directions. Overall, results showed that both recognition accuracy and precision were worse in middle serial positions, suggesting the occurrence of primacy and recency effects. We found that rTMS delivered during the early (but not the late) phase of the retention interval was able to impair not only recognition of RDKs, but also the precision of the retained motion direction. However, such impairment occurred only for RDKs presented in middle positions along the presented sequence, where performance was already closer to chance level. Altogether these findings suggest an involvement of hMT+ in the memory encoding of visual motion direction. Given that both position sequence and rTMS modulated not only recognition but also the precision of the stored information, these findings are in support of a model of visual short-term memory with a variable resolution of each stored item, consistent with the assigned amount of memory resources, and that such item-specific memory resolution is supported by the functional integrity of area hMT+.Andrea PavanFilippo GhinGianluca CampanaMDPI AGarticlevisual short-term memoryrepetitive transcranial magnetic stimulationvisual memory precisionserial memory effectsNeurosciences. Biological psychiatry. NeuropsychiatryRC321-571ENBrain Sciences, Vol 11, Iss 1471, p 1471 (2021)
institution DOAJ
collection DOAJ
language EN
topic visual short-term memory
repetitive transcranial magnetic stimulation
visual memory precision
serial memory effects
Neurosciences. Biological psychiatry. Neuropsychiatry
RC321-571
spellingShingle visual short-term memory
repetitive transcranial magnetic stimulation
visual memory precision
serial memory effects
Neurosciences. Biological psychiatry. Neuropsychiatry
RC321-571
Andrea Pavan
Filippo Ghin
Gianluca Campana
Visual Short-Term Memory for Coherent and Sequential Motion: A rTMS Investigation
description We investigated the role of the human medio-temporal complex (hMT+) in the memory encoding and storage of a sequence of four coherently moving random dot kinematograms (RDKs), by applying repetitive transcranial magnetic stimulation (rTMS) during an early or late phase of the retention interval. Moreover, in a second experiment, we also tested whether disrupting the functional integrity of hMT+ during the early phase impaired the precision of the encoded motion directions. Overall, results showed that both recognition accuracy and precision were worse in middle serial positions, suggesting the occurrence of primacy and recency effects. We found that rTMS delivered during the early (but not the late) phase of the retention interval was able to impair not only recognition of RDKs, but also the precision of the retained motion direction. However, such impairment occurred only for RDKs presented in middle positions along the presented sequence, where performance was already closer to chance level. Altogether these findings suggest an involvement of hMT+ in the memory encoding of visual motion direction. Given that both position sequence and rTMS modulated not only recognition but also the precision of the stored information, these findings are in support of a model of visual short-term memory with a variable resolution of each stored item, consistent with the assigned amount of memory resources, and that such item-specific memory resolution is supported by the functional integrity of area hMT+.
format article
author Andrea Pavan
Filippo Ghin
Gianluca Campana
author_facet Andrea Pavan
Filippo Ghin
Gianluca Campana
author_sort Andrea Pavan
title Visual Short-Term Memory for Coherent and Sequential Motion: A rTMS Investigation
title_short Visual Short-Term Memory for Coherent and Sequential Motion: A rTMS Investigation
title_full Visual Short-Term Memory for Coherent and Sequential Motion: A rTMS Investigation
title_fullStr Visual Short-Term Memory for Coherent and Sequential Motion: A rTMS Investigation
title_full_unstemmed Visual Short-Term Memory for Coherent and Sequential Motion: A rTMS Investigation
title_sort visual short-term memory for coherent and sequential motion: a rtms investigation
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/7ebca7ba0107451790c92ca9d484c82f
work_keys_str_mv AT andreapavan visualshorttermmemoryforcoherentandsequentialmotionartmsinvestigation
AT filippoghin visualshorttermmemoryforcoherentandsequentialmotionartmsinvestigation
AT gianlucacampana visualshorttermmemoryforcoherentandsequentialmotionartmsinvestigation
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