The Effect of Object Type on Building Scene Imagery—an MEG Study

Monk, Anna M.; Barnes, Gareth R.; Maguire, Eleanor A.

doi:10.3389/fnhum.2020.592175

Cited by 5 publications

(6 citation statements)

References 69 publications

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“…Consistent with the prominent role of space processing for mental construction, SD objects are preferentially chosen as the initial building block to mentally construct a scene, and are picked last to be removed from a mental scene (Mullally & Maguire, 2013). Processing of SD and SA stimuli is associated with different activity in the parahippocampal cortex (Mullally & Maguire, 2011), the superior temporal gyrus, and vmPFC (Monk et al, 2020), in line with the different functional properties of the two classes of items.…”

Section: Implications For Empirical Researchmentioning

confidence: 99%

Computational constraints on the associative recall of spatial scenes

et al. 2023

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We consider a model of associative storage and retrieval of compositional memories in an extended cortical network. Our model network is comprised of Potts units, which represent patches of cortex, interacting through long-range connections. The critical assumption is that a memory, for example of a spatial view, is composed of a limited number of items, each of which has a pre-established representation: storing a new memory only involves acquiring the connections, if novel, among the participating items. The model is shown to have a much lower storage capacity than when it stores simple unitary representations. It is also shown that an input from the hippocampus facilitates associative retrieval. When it is absent, it is advantageous to cue rare rather than frequent items. The implications of these results for emerging trends in empirical research are discussed.

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Section: Implications For Empirical Researchmentioning

confidence: 99%

Computational constraints on the associative recall of spatial scenes

et al. 2023

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“… 2019 ); see also (Monk et al. 2020 , 2021 )], and this region may play a similar role during spontaneous cognition. Indeed, damage (Bertossi and Ciaramelli 2016 ; Philippi et al.…”

Section: Discussionmentioning

confidence: 83%

“…Ciaramelli and Treves (2019) and McCormick et al (2018) have proposed that the prefrontal cortex, especially in its ventral-medial sectors (vmPFC) might support the initiation (internal triggering) of mindwandering events. Indeed, recent MEG findings show that activity in the vmPFC precedes (presumably drives) hippocampal activity during (voluntary) scene construction and autobiographical memory retrieval [ (Barry et al 2019); see also (Monk et al 2020(Monk et al , 2021], and this region may play a similar role during spontaneous cognition. Indeed, damage (Bertossi and Ciaramelli 2016;Philippi et al 2021) or inhibition (Bertossi et al 2017;Giordani et al 2023) of the vmPFC [but not the hippocampus; McCormick et al (2018)] reduce the frequency of mind-wandering.…”

Section: Mind Wandering and Creativitymentioning

confidence: 99%

Taking time to compose thoughts with prefrontal schemata

Ryom,

Basu,

Stendardi

et al. 2024

Exp Brain Res

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Under what conditions can prefrontal cortex direct the composition of brain states, to generate coherent streams of thoughts? Using a simplified Potts model of cortical dynamics, crudely differentiated into two halves, we show that once activity levels are regulated, so as to disambiguate a single temporal sequence, whether the contents of the sequence are mainly determined by the frontal or by the posterior half, or by neither, depends on statistical parameters that describe its microcircuits. The frontal cortex tends to lead if it has more local attractors, longer lasting and stronger ones, in order of increasing importance. Its guidance is particularly effective to the extent that posterior cortices do not tend to transition from state to state on their own. The result may be related to prefrontal cortex enforcing its temporally-oriented schemata driving coherent sequences of brain states, unlike the atemporal “context” contributed by the hippocampus. Modelling a mild prefrontal (vs. posterior) lesion offers an account of mind-wandering and event construction deficits observed in prefrontal patients.

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“…Our SEM revealed mainly recurrent interactions. However, recent MEG studies showed that the vmPFC was the driving influence during scene construction ( Monk et al, 2020 ) and autobiographical memory recall ( McCormick et al, 2020 ). It would be interesting to conduct the paradigm here in MEG to elucidate the temporal dynamics and effective connectivity further.…”

Section: Discussionmentioning

confidence: 99%

“…Another issue concerns functional and effective connectivity between brain areas. For example, recent magnetoencephalography (MEG) studies have shown that the vmPFC drives activity in the hippocampus and lateral temporal cortex during the construction of scene imagery ( Barry et al, 2019 ; Monk et al, 2020 , 2021 ) and also during autobiographical memory recall ( McCormick et al, 2020 ). This has prompted the suggestion that the vmPFC may play a key role in orchestrating scene processing perhaps because of its role in supporting schema ( McCormick et al, 2018 ; Ciaramelli et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

The distinct and overlapping brain networks supporting semantic and spatial constructive scene processing

McCormick

Maguire

2021

Neuropsychologia

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Scene imagery features prominently when we recall autobiographical memories, imagine the future and navigate around in the world. Consequently, in this study we sought to better understand how scene representations are supported by the brain. Processing scenes involves a variety of cognitive processes that in the real world are highly interactive. Here, however, our goal was to separate semantic and spatial constructive scene processes in order to identify the brain areas that were distinct to each process, those they had in common, and the connectivity between regions. To this end, participants searched for either semantic or spatial constructive impossibilities in scenes during functional MRI. We focussed our analyses on only those scenes that were possible, thus removing any error detection that would evoke reactions such as surprise or novelty. Importantly, we also counterbalanced possible scenes across participants, enabling us to examine brain activity and connectivity for the same possible scene images under two different conditions. We found that participants adopted different cognitive strategies, which were reflected in distinct oculomotor behaviour, for each condition. These were in turn associated with increased engagement of lateral temporal and parietal cortices for semantic scene processing, the hippocampus for spatial constructive scene processing, and increased activation of the ventromedial prefrontal cortex (vmPFC) that was common to both. Connectivity analyses showed that the vmPFC switched between semantic and spatial constructive brain networks depending on the task at hand. These findings further highlight the well-known semantic functions of lateral temporal areas, while providing additional support for the previously-asserted contribution of the hippocampus to scene construction, and recent suggestions that the vmPFC may play a key role in orchestrating scene processing.

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The Effect of Object Type on Building Scene Imagery—an MEG Study

Cited by 5 publications

References 69 publications

Computational constraints on the associative recall of spatial scenes

Computational constraints on the associative recall of spatial scenes

Taking time to compose thoughts with prefrontal schemata

The distinct and overlapping brain networks supporting semantic and spatial constructive scene processing

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