Perceptual closure and object identification: Electrophysiological responses to incomplete pictures

Stuss, Donald T.; Picton, Terence W.; Cerri, Adriano; Leech, E. E.; Stethem, L. L.

doi:10.1016/0278-2626(92)90047-p

Cited by 48 publications

(44 citation statements)

References 40 publications

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“…indexed by the N350, whenever images have most (if not all) of their parts visible or recoverable, as in Pietrowsky et al [37], than when their parts are entirely missing, or not recoverable from the visible contours, as in Stuss et al [55] (Fig. 1); successful object identification from non-recoverable parts is first seen in the LPC.…”

Section: Introductionmentioning

confidence: 97%

“…Two prior ERP studies comparing successful and failed identification reported divergence times that differed by a few 100 ms (600 ms [55] versus less than 300 ms [37]). Stuss et al [55] showed people fragmented line drawings of objects at four levels of completeness and found a broadly-distributed late positive complex (LPC) that diverged as a function of naming accuracy by 550-650 ms. Pietrowsky et al [37] replicated the LPC finding but also observed an earlier effect; identified landscapes first differed from unidentified and scrambled scenes by ∼250-300 ms in a frontal negativity peaking between 325 and 400 ms (N350) [37,45,48].…”

Section: Introductionmentioning

confidence: 99%

“…Stuss et al [55] showed people fragmented line drawings of objects at four levels of completeness and found a broadly-distributed late positive complex (LPC) that diverged as a function of naming accuracy by 550-650 ms. Pietrowsky et al [37] replicated the LPC finding but also observed an earlier effect; identified landscapes first differed from unidentified and scrambled scenes by ∼250-300 ms in a frontal negativity peaking between 325 and 400 ms (N350) [37,45,48]. Presence or absence of the frontal N350, thus, distinguishes the timing of visual identification between these two studies.…”

Section: Introductionmentioning

confidence: 99%

“…Regarding stimulus factors, we hypothesized that identification occurs during an earlier phase of object model selection, [55]. Both Stuss et al [55] types (top) have missing parts and others that are "non-recoverable": most remaining contours cannot be connected (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…[3,11,15,31,51,61]); both prior studies included repeated stimuli but in different ways. In Stuss et al [55], the identification processes were subject to episodic long-term memory(LTM) influences since participants had seen complete versions of the fragmented drawings along with their names before the actual ERP recording. This can be problematic given the known similarity in the time course and ERP componentry associated with identification and some LTM effects.…”

Section: Introductionmentioning

confidence: 99%

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Neurophysiological evidence for two processing times for visual object identification

Schendan

2002

Neuropsychologia

120

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Event-related brain potentials (ERPs) were recorded to fragmented pictures of objects that were named correctly or were not to investigate the time course of visual object identification. The first ERP difference distinguishing identified from unidentified pictures estimates the upper limit of the time by which human brain regions have begun to activate long-term memory (LTM) representations specifying the identity of a visual object. Data from 15 young adults indicate that this time varies with the extent to which object parts are recoverable from the visual input, being ∼200 ms earlier with recoverable than unrecoverable parts. Successful identification is evident by ∼300 ms when object parts and overall structural configuration are readily recoverable but not until ∼550 ms when object parts are difficult or impossible to recover (i.e. too poorly specified by the available contours to be recovered). In both cases, successful identification is associated with greater relative positivity. However, unidentified recoverable pictures are associated with an enhanced frontal negativity (N350), linked to object matching operations, not seen for non-recoverable pictures. Taken together, these results implicate two distinct processing sequences in the successful identification of visual objects.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Neurophysiological evidence for two processing times for visual object identification

Schendan

2002

Neuropsychologia

120

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ERP generator anomalies in presymptomatic carriers of the Alzheimer's disease E280A PS‐1 mutation

Bobes

García

Lopera

et al. 2009

Human Brain Mapping

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Although subtle anatomical anomalies long precede the onset of clinical symptoms in Alzheimer's disease, their impact on the reorganization of brain networks underlying cognitive functions has not been fully explored. A unique window into this reorganization is provided by presymptomatic cases of familial Alzheimer's disease (FAD). Here we studied neural circuitry related to semantic processing in presymptomatic FAD cases by estimating the intracranial sources of the N400 event-related potential (ERP). ERPs were obtained during a semantic-matching task from 24 presymptomatic carriers and 25 symptomatic carriers of the E280A presenilin-1 (PS-1) mutation, as well as 27 noncarriers (from the same families). As expected, the symptomatic-carrier group performed worse in the matching task and had lower N400 amplitudes than both asymptomatic groups, which did not differ from each other on these variables. However, N400 topography differed in mutation carrier groups with respect to the noncarriers. Intracranial source analysis evinced that the presymptomatic-carriers presented a decrease of N400 generator strength in right inferior-temporal and medial cingulate areas and increased generator strength in the left hippocampus and parahippocampus compared to the controls. This represents alterations in neural function without translation into behavioral impairments. Compared to controls, the symptomatic-carriers presented a similar anatomical shift in the distribution of N400 generators to that found in presymptomatic-carriers, albeit with a larger reduction in generator strength. The redistribution of N400 generators in presymptomatic-carriers indicates that early focal degeneration associated with the mutation induces neural reorganization, possibly contributing to a functional compensation that enables normal performance in the semantic task.

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Imaging the spatiotemporal dynamics of cognition with high‐resolution evoked potential methods

Gevins¹,

Cutillo²,

DuRousseau³

et al. 1994

Human Brain Mapping

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Subsecond temporal resolution is necessary to resolve the changes in brain activity that are associated with task-related cognitive processes, Evoked potentials (EPs) provide the requisite millisecondrange temporal resolution, and do so with nonencumbering recordings at a reasonably low cost. These features would seem to make EPs the ideal complement to structural and functional magnetic resonance images (MRIs) and positron emission tomography (PET). However, until recently, the utility of EPs has been limited by their poor spatial resolution. Sufficient spatial correspondence has not existed between EPs and other brain imaging modalities to determine unambiguously the relationship between a sequence of EP components and structures visualized by MRI or PET. We describe progress that has been made toward overcoming this obstacle by registering electrophysiological data with anatomical information from each subject's MRI, by improving the spatial resolution of the EP, and by using analytic methods for measuring the spatiotemporal dynamics of distributed neurocognitive processes. The use of these techniques is illustrated by reviewing several experiments in which sequences of component neural processes were measured during cognitive tasks. D

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Perceptual closure and object identification: Electrophysiological responses to incomplete pictures

Cited by 48 publications

References 40 publications

Neurophysiological evidence for two processing times for visual object identification

Neurophysiological evidence for two processing times for visual object identification

ERP generator anomalies in presymptomatic carriers of the Alzheimer's disease E280A PS‐1 mutation

Imaging the spatiotemporal dynamics of cognition with high‐resolution evoked potential methods

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