WOBIB: 19 - Horovitz, et al. (2002) Correlations and di ...
 
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Silvina Horovitz; Pawel Skudlarski; John Gore. Correlations and dissociations between BOLD signal and P300 amplitude in an auditory oddball task: a parametric approach to combining fMRI and ERP. Magnetic Resonance Imaging 20(4):319, 2002. PMID: 12165350. WOBIB: 19.

A parametric method is proposed to examine the relationship between neuronal activity, measured with event related potentials (ERPs), and the hemodynamic response, observed with functional magnetic resonance imaging (fMRI), during an auditory oddball paradigm. After verifying that the amplitude of the evoked response P300 increases as the probability of oddball target presentation decreases, we explored the corresponding effect of target frequency on the fMRI signal. We predicted and confirmed that some regions that showed activation changes following each oddball are affected by the rate of presentation of the oddballs, or the probability of an oddball target. We postulated that those regions that increased activation with decreasing probability might be responsible for the corresponding changes in the P300 amplitude.fMRI regions that correlated with the amplitude of the P300 wave were supramarginal gyri, thalamus, insula and right medial frontal gyrus, and are presumably sources of the P300 wave. Other regions, such as anterior and posterior cingulate cortex, were activated during the oddball paradigm but their fMRI signal changes were not correlated with the P300 amplitudes. This study thus shows how combining fMRI and ERP in a parametric design identifies task-relevant sources of activity and allows separation of regions that have different response properties.

Asymmetry: -0.65625 (left: -1, right: +1)

VRML2 file (70 Kb)

1 Auditory oddball. Frequent 1000Hz tones interrupted by infrequent oddball 1500Hz tones which should result in button press. WOEXP: 53.


corner cube of WOBIB_19

Related - positive correlated volumes

+1: 1.00000 Silvina Horovitz; Pawel Skudlarski; John Gore. Correlations and dissociations between BOLD signal and P300 amplitude in an auditory oddball task: a parametric approach to combining fMRI and ERP. Magnetic Resonance Imaging 20(4):319, 2002. PMID: 12165350. WOBIB: 19.

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+25: 0.42761 K. L. Casey; S. Minoshima; T. J. Morrow; R. A. Koeppe. Comparison of human cerebral activation pattern during cutaneous warmth, heat pain, and deep cold pain. Journal of Neurophysiology 76(1):571-81, 1996. PMID: 8836245. WOBIB: 102.


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-5: 0.00421 A. T. Smith; M. W. Greenlee; K. D. Singh; F. M. Kraemer; J. Hennig. The processing of first- and second-order motion in human visual cortex assessed by functional magnetic resonance imaging (fMRI). Journal of Neuroscience 18(10):3816-30, 1998. PMID: 9570811. WOBIB: 53.

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