Abstract:
:The perception of global coherent motion perception in complex motion patterns containing different direction vectors was investigated. Random dot kinematograms (RDK), plaids and fragmented plaid pattern were presented in which direction vectors of the moving elements were varied. In order to elicit coherent motion perception, all elements were displaced in the same direction (delta0 degrees). In a second condition, fifty percent of the elements were moved diagonally downwards to the left, with the remaining elements moving orthogonally (delta 90 degrees). Simultaneously with psychophysical judgements on the perceived motion direction, visual evoked potentials (VEPs) were recorded at occipital electrode positions. Onset of a global coherent motion was associated with a VEP negativity occurring at about 200 ms. The amplitude of this component was clearly reduced when local ambiguous signals could not be integrated to produce the perception of global coherent motion.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Niedeggen M,Wist ERdoi
10.1016/s0304-3940(98)00222-5subject
Has Abstractpub_date
1998-04-24 00:00:00pages
61-4issue
2eissn
0304-3940issn
1872-7972pii
S0304394098002225journal_volume
246pub_type
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