ECVP 2007 Abstract

Cite as:
Wattam-Bell J, Nyström P, Braddick O, Birtles D, Atkinson J, Rosander K, von Hofsten C, 2007, "High-density VERPs to global form and motion in adults and infants" Perception 36 ECVP Abstract Supplement

High-density VERPs to global form and motion in adults and infants

J Wattam-Bell, P Nyström, O Braddick, D Birtles, J Atkinson, K Rosander, C von Hofsten

Sensitivity to global form and global motion are presumed indicators of ventral- and dorsal-stream processing, respectively. We have studied the development of the two streams with high-density (128 channel) VERPs, to explore topographic differences in the responses to global form and motion. The form stimulus had dots arranged in short concentric arcs giving a static global circular pattern. The motion stimulus dots moved along similar arcs, producing global rotation. These patterns alternated at 2 Hz with randomly arranged dot trajectories with no global structure. Adults showed posterior responses to form and motion with significantly different topographies. Of thirty 3 - 5-month-olds, 60% showed motion responses, while only 20% showed a form response. In infants showing responses to both, there was, as in adults, a significant difference in the topography. Global form and motion responses have distinct scalp distributions, implying distinct neural sources, in both adults and infants. The high-density multichannel method opens the possibility of tracking developmental changes, and the effects of perinatal risk factors, in the relationship between these sources.

[Supported by the UK Medical Research Council grant number G0601007, and the Swedish Research Council.]

These web-based abstracts are provided for ease of seaching and access, but certain aspects (such as as mathematics) may not appear in their optimum form. For the final published version of this abstract, please see
ECVP 2007 Abstract Supplement (complete) size: 2091 Kb