Age-related changes in the electrophysiological response to visual stimulus novelty: A topographical approach
30 Age-related changes in the electrophysical response to visual stimulus novelty a topographical approach.pdf (1.273Mb)
Access StatusFull text of the requested work is not available in DASH at this time ("restricted access"). For more information on restricted deposits, see our FAQ.
Thomas, Kathleen M.
MetadataShow full item record
CitationThomas, Kathleen M., and Charles A. Nelson. 1996. “Age-Related Changes in the Electrophysiological Response to Visual Stimulus Novelty: A Topographical Approach.” Electroencephalography and Clinical Neurophysiology 98 (4) (April): 294–308. doi:10.1016/0013-4694(95)00280-4.
AbstractThe relationship of task relevance and stimulus probability to P300 morphology, latency and distribution was assessed. Eight year olds and adults completed visual oddball tasks of recognition memory with frequent non-target (60%), infrequent target (20%), and infrequent novel (20%) stimuli. Stimuli consisted of 2 female faces posing neutral expressions, and 40 trial unique novel photographs depicting scenes, animals, objects or abstract patterns. Event-related potentials were recorded from 17 electrodes over frontal, central and parietal scalp, including lateral temporal sites. All stimuli elicited P300 responses at parietal electrodes, with the largest responses to the target stimuli (relevant and infrequent). The P300 responses of adults and children were morphologically dissimilar, with children showing broader peaks and latency shifts across electrodes. In addition, the eight year olds displayed a frontal negativity to novel stimuli which was absent in the responses of adult participants. Results suggest that different anatomical or functional circuitry may be involved in the processing of novelty for adults as compared to eight year olds.
Citable link to this pagehttp://nrs.harvard.edu/urn-3:HUL.InstRepos:34865299
- HMS Scholarly Articles 
Contact administrator regarding this item (to report mistakes or request changes)