WOBIB: 136 - Chen, et al. (2002) Spatial summation of pa ...
 
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Andrew C. N. Chen; David M. Niddam; Helen J. Crawford; Robert Oostenveld; Lars Arendt-Nielsen. Spatial summation of pain processing in the human brain as assessed by cerebral event related potentials. Neuroscience Letters 328(2):190-194, 2002. PMID: 12133585. FMRIDCID: . WOBIB: 136.

To understand spatial summation of pain processing in the brain, we investigated the cerebral evoked responses to non-painful and painful contact heat stimulation (70 degrees C/s fast onset; intensity 2,4,6, corresponding to the individual's non-, slight and moderate pain) comparing one (1s) vs. two spots (2s) in 11 subjects while electroencephalographic signals were recorded. Significant spatial summation effects were shown only for the pain levels. For moderate pain, global field power examination isolated two peak activations for the vertex (Cz) N550 and P750 components. The single dipole modelling identified as likely the supplementary motor area, SMA area-6 source for N550, and posterior cingulate area-23 for P750. These source components showed a significantly faster (41.2 ms) latency and a shift in location from dorsal to ventral SMA of N550 toward cingulate area-31 between the 1s and 2s conditions. The temporal and spatial shift during spatial summation may reflect speeding up of the limbic affective reaction and prefrontal cognitive preparation in impending aversion and is deemed essential for integration of bodily sensations, such as pain.

Asymmetry: 0.62500 (left: -1, right: +1)

VRML2 file (60 Kb)

1 Hot pain in 1 second for N550 component. Dipole source for the N550 event-related potential component associated with hot pain during 1 second. WOEXP: 420.
2 Hot pain in 2 second for N550 component. Dipole source for the N550 event-related potential component associated with hot pain during 2 seconds. WOEXP: 421.
3 Hot pain in 1 second for P750 component. Dipole source for the P750 event-related potential component associated with hot pain during 1 seconds. WOEXP: 422.
4 Hot pain in 2 second for P750 component. Dipole source for the P750 event-related potential component associated with hot pain during 2 seconds. WOEXP: 423.


corner cube of WOBIB_136

Related - positive correlated volumes

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