A primer on motion visual evoked potentials

Heinrich, Sven

doi:10.1007/s10633-006-9043-8

Cited by 68 publications

(68 citation statements)

References 203 publications

(178 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The latency of these differences is consistent with previous studies showing that processing of coherent motion occurs around 170 ms (Heinrich 2007;Kuba et al 2007;Niedeggen and Wist 1999;Mercier et al 2009). During this time window, stronger activations were found for the coherent motion conditions in the posterior temporal, parieto-occipital and parietal regions (see Fig.…”

Section: Vm Control Tasksupporting

confidence: 91%

Dorsal and ventral stream contributions to form-from-motion perception in a patient with form-from motion deficit: a case report

et al. 2016

View full text Add to dashboard Cite

The main model of visual processing in primates proposes an anatomo-functional distinction between the dorsal stream, specialized in spatio-temporal information, and the ventral stream, processing essentially form information. However, these two pathways also communicate to share much visual information. These dorso-ventral interactions have been studied using form-from-motion (FfM) stimuli, revealing that FfM perception first activates dorsal regions (e.g., MT+/V5), followed by successive activations of ventral regions (e.g., LOC). However, relatively little is known about the implications of focal brain damage of visual areas on these dorso-ventral interactions. In the present case report, we investigated the dynamics of dorsal and ventral activations related to FfM perception (using topographical ERP analysis and electrical source imaging) in a patient suffering from a deficit in FfM perception due to right extrastriate brain damage in the ventral stream. Despite the patient's FfM impairment, both successful (observed for the highest level of FfM signal) and absent/failed FfM perception evoked the same temporal sequence of three processing states observed previously in healthy subjects. During the first period, brain source localization revealed cortical activations along the dorsal stream, currently associated with preserved elementary motion processing. During the latter two periods, the patterns of activity differed from normal subjects: activations were observed in the ventral stream (as reported for normal subjects), but also in the dorsal pathway, with the strongest and most sustained activity localized in the parieto-occipital regions. On the other hand, absent/failed FfM perception was characterized by weaker brain activity, restricted to the more lateral regions. This study shows that in the present case report, successful FfM perception, while following the same temporal sequence of processing steps as in normal subjects, evoked different patterns of brain activity. By revealing a brain circuit involving the most rostral part of the dorsal pathway, this study provides further support for neuro-imaging studies and brain lesion investigations that have suggested the existence of different brain circuits associated with different profiles of interaction between the dorsal and the ventral streams.

show abstract

Section: Vm Control Tasksupporting

confidence: 91%

Dorsal and ventral stream contributions to form-from-motion perception in a patient with form-from motion deficit: a case report

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Our study showed that controls and patients with AD differ in motion processing examined by means of the motion-onset VEPs, the main peak of which-N2-was shown to be rather specific for magnocellular pathway/dorsal stream activity [12,26,30,31]. We found a significantly lower amplitude of N2 peak in motion-onset VEPs to radial stimuli placed in the periphery of the visual field (when central 20 deg was masked) in patients with AD when compared with controls, but we did not get a significant difference for full-field radial stimuli as well as for translational motion stimuli.…”

Section: Visual Evoked Potentialsmentioning

confidence: 61%

Visual evoked potentials to pattern, motion and cognitive stimuli in Alzheimer’s disease

et al. 2010

View full text Add to dashboard Cite

The aim of our study was to verify reported visual dysfunctions of patients with Alzheimer disease with the use of several variants of VEPs and visual ERPs and to learn whether these methods can be useful in diagnostics of AD. We tested 15 patients (6 women and 9 men, aged from 58 to 87) with mild to moderate Alzheimer disease (12-23 points of Mini Mental State Examination) and 15 age, gender and education level matched controls. The examination consisted of VEPs to pattern-reversal and motion-onset stimulation (to translational and radial movement) and of visual ERPs recorded during an odd-ball test. The subjects were instructed to signalize target stimuli by pressing of a button, which enabled to evaluate also the reaction time. While pattern-reversal VEPs were comparable in patients and controls, there were significantly smaller N2 peak amplitudes of motion-onset VEPs in patients with AD (in particular in radial moving stimuli outside the central 20 deg of the visual field), which suggests a dysfunction of the motion-processing (magnocellular) system or the dorsal cortical stream. ERPs, having significantly longer latencies in patients than in controls, distinguished well both groups. However, the individual AD diagnostics based on ERPs seems to be limited by rather high inter-individual variability of the ERP latencies. The ERPs might, however, be useful in disease progress and therapy effect estimation. Electrophysiological parameters did not correlate with neuropsychological ADAS cog test (Alzheimer Disease Assessment Scale--cognitive part).

show abstract

“…N2)/2) of the main P100 peak and in the M-VEPs peak latencies and inter-peak absolute mean amplitudes ((P1 ? P2)/2-N2) of the N2 peak (this peak was shown to represent the main motionspecific component of this VEP type [7,8,11].…”

Section: Methodsmentioning

confidence: 90%

“…Two types of visual stimuli were used to elicit VEPpattern-reversal and motion-onset stimuli-with the aim of testing the function of the two fundamental subsystems of the visual pathway (magnocellular and parvocellular) and their cortical projections (the dorsal and ventral streams) [6][7][8].…”

Section: Methodsmentioning

confidence: 99%

Normal sensory and absent cognitive electrophysiological responses in functional visual loss following chemical eye burn

et al. 2011

View full text Add to dashboard Cite

show abstract

A primer on motion visual evoked potentials

Cited by 68 publications

References 203 publications

Dorsal and ventral stream contributions to form-from-motion perception in a patient with form-from motion deficit: a case report

Dorsal and ventral stream contributions to form-from-motion perception in a patient with form-from motion deficit: a case report

Visual evoked potentials to pattern, motion and cognitive stimuli in Alzheimer’s disease

Normal sensory and absent cognitive electrophysiological responses in functional visual loss following chemical eye burn

Contact Info

Product

Resources

About