Article

Age-sensitivity of P3 in high-functioning adults.

Institute of Psychology, University of Oslo, P.B. 1094 Blindern, 0317 Oslo, Norway.
Neurobiology of Aging (Impact Factor: 6.17). 11/2005; 26(9):1297-9; discussion 1301-6. DOI: 10.1016/j.neurobiolaging.2005.02.018
Source: PubMed

ABSTRACT In their interesting paper, Daffner et al. [Daffner KR, Ryan KK, Williams DM, Budson AE, Rentz DM, Scinto LFM, et al. Age-related differences in novelty and target processing among cognitively healthy high performing adults. Neurobiol Aging 2005;26:1283-95] argue that previous studies have found changes in ERP components in response to novel and target stimuli due to two methodological factors: (1) lack of control for differences in level of cognitive status between age groups, and (2) not controlling for a non-specific age-related processing difference for all stimulus types (standards, targets, and novel). The questions raised by Daffner et al. are interesting, but based on existing literature, their conclusion seems premature. In the following, we will present examples from empirical literature as well as re-analyses of some of our own work to illustrate problematic aspects of Daffner et al.'s position.

0 Bookmarks
 · 
107 Views
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Do person characteristics determine when novel, attention-grabbing stimuli loose their novelty? The aim of the present study was to investigate habituation of the visual event-related potentials (ERP) P3a and P3b in men that (1) were engaged in extreme sports, (2) had extremely high scores on the Impulsivity Sensation Seeking scale of the Zuckerman-Kuhlman Personality Questionnaire (ZKPQ), yet were not engaged in extreme sports, or (3) had extremely low scores on ZKPQ. The results showed that P3a habituated significantly more in extreme sporters than in the other groups. The same was not found in comparison of the high and the low ZKPQ scorers. There were not differences between the groups in overall amplitude. It is concluded that ERP habituation may be more relevant than mere amplitude to the sensation seeking trait in extreme sporters, and that they differ from others in ERPs related to automatic alerting-related processes, not controlled cognitive processing.
    Biological Psychology 05/2007; 75(1):87-94. · 3.40 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The purpose of the study was to assess the relationship between the P3a/P3b brain potentials, cortical thickness, and cognitive function in aging. Thirty-five younger and 37 older healthy participants completed a visual three-stimuli oddball ERP (event-related potential)-paradigm, a battery of neuropsychological tests, and MRI scans. Groups with short vs. long latency, and low vs. high amplitude, were compared on a point by point basis across the entire cortical mantle. In the young, thickness was only weakly related to P3. In the elderly, P3a amplitude effects were found in parietal areas, the temporoparietal junction, and parts of the posterior cingulate cortex. P3b latency was especially related to cortical thickness in large frontal regions. Path models with the whole sample pooled together were constructed, demonstrating that cortical thickness in the temporoparietal cortex predicted P3a amplitude, which in turn predicted executive function, and that thickness in orbitofrontal cortex predicted P3b latency, which in turn predicted fluid function. When age was included in the model, the relationship between P3 and cognitive function vanished, while the relationship between regional cortical thickness and P3 remained. It is concluded that thickness in specific cortical areas correlates with scalp recorded P3a/P3b in elderly, and that these relationships differentially mediate higher cognitive function.
    Human Brain Mapping 12/2007; 28(11):1098-116. · 6.88 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Novelty processing is critical for human survival in a rapidly changing environment. However, how and when the orientation attention reflected by novelty processing is modulated by personality elements such as sensation seeking is still opened. The present study investigated the time course of novelty processing in sensation seeking by recording the event-related potentials (ERPs) in a visual novelty oddball task. High and low sensation seekers performed a visual oddball task, in which participants were instructed to detect an inverted triangle (target) and ignore both upright triangle (standard) and unrepeated line drawings of pseudo-objects deviant from participants' long-term memory (novelty). While there were no group differences in ERPs to standard and target stimuli, ERPs to novel stimuli showed a strong modulation by sensation seeking trait. The low sensation seekers, compared with the high sensation seekers, exhibited an increased N2 to novel stimuli at frontal sites. Moreover, the Pd3 component reflecting purely novelty processing was enhanced and less habituated in the high sensation seeking participants. The current findings implicated that low sensation seekers showed sensitivity to novelty detection, whereas high sensation seekers displayed stronger and more sustained novelty appraisal.
    International journal of psychophysiology: official journal of the International Organization of Psychophysiology 02/2010; 76(2):57-63. · 3.05 Impact Factor

Full-text

View
1 Download
Available from