When people recollect these past experiences, a distributed set of brain areas is engaged, including the hippocampus, parahippocampal, retrosplenial, parietal, and ventromedial prefrontal cortices ( Maguire, 2001 Svoboda et al., 2006 Cabeza and St Jacques, 2007 Spreng et al., 2009). Functional MRI (fMRI) has helped delineate the brain areas involved in supporting event processing ( Zacks et al., 2001 Hasson et al., 2008 Lehn et al., 2009 Summerfield et al., 2010 Reagh et al., 2020), a salient example being the events captured in autobiographical memories. Here, we defined an event as a dynamic, unfolding sequence of actions that could be described in a story-like narrative.
These dynamic events are central to our lived experience, be that during “online” perception, or when we recall the past or imagine the future.
#Stykz image movie#
With parallels in terms of how the individual frames of a movie appear to be continuous ( Tan, 2018), somehow these separate images become linked together, such that we have a sense of the seamless unfolding of life and events ( Cutting, 2005 Magliano and Zacks, 2011).
#Stykz image series#
We generally perceive the world as a series of visual snapshots punctuated by eye blinks and saccades. The hippocampus, therefore, may help to set the scene for events very early on. Hippocampal engagement during the first image frame of scene-based events could reflect its role in registering a recognizable context perhaps based on templates or schemas. Further probing of this difference using source reconstruction revealed greater engagement of a set of brain regions across parietal, frontal, premotor, and cerebellar cortices, with the largest change in broadband (1–30 Hz) power in the hippocampus during scene-based movie events. Only one difference between the two conditions was evident, and that was during the viewing of the first image frame of events, detectable across frontotemporal sensors. We examined the evoked neuronal responses to each image frame along the time course of the movie events. Consequently, during magnetoencephalography (MEG), we had female and male humans watch highly matched unfolding movie events composed of either scene image frames that reflected the real world, or frames depicting abstract patterns. Addressing this issue could provide insights into the nature of its contribution to event processing, with relevance for theories of hippocampal function. It is unclear, however, whether the hippocampus would be similarly responsive to unfolding events that involve abstract imagery. Events typically involve visual imagery from the real world (scenes), and the hippocampus is frequently engaged in this context. We experience these events as seamless, although they are composed of individual images captured in between the interruptions imposed by eye blinks and saccades.
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