Cortical augmenting in alexithymic subjects after unpleasant acoustic stimulation.

Cortical augmenting in alexithymic subjects after unpleasant acoustic stimulation. Research Abstract Details 

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Cortical augmenting in alexithymic subjects after unpleasant acoustic stimulation. Abstract Text:

Ralf ,Christine Schneider,Wolfgang Tress,Matthias Franz,Ralf Schäfer,Christine Schneider,Wolfgang Tress,Matthias Franz,

OBJECTIVE: Alexithymia has a high prevalence in patients with chronic or somatoform pain disorders. Various investigations demonstrated a hypersensitivity and low tolerance of alexithymics to touch and painful stimulation. It was argued that alexithymic characteristics may lead an individual to augment stimuli in order to prevent ignoring stimuli that might be dangerous. Therefore, there may be a relation to the reducer-augmenter construct. To test this hypothesis, cortical reactivity in response to unpleasant acoustical stimulation was measured. METHODS: Nineteen high alexithymics and 18 low alexithymics were stimulated with five series of acoustic stimuli (white noise) of different intensity levels. Evoked potentials were recorded at electroencephalogram electrodes Fz, Cz, and Pz. RESULTS: With ascending stimulus intensities, both groups showed increasing P1-N1 and N1-P2 peak-to-peak amplitudes. High alexithymics had higher P1-N1 amplitudes and a stronger intensity-dependent slope of P1-N1 amplitude. In contrast to that, N1-P2 amplitude of low alexithymics tended to decrease in response to the highest stimulus intensity level. CONCLUSION: High alexithymic subjects seem to behave like cortical augmenters. This may be due to a disturbed transmarginal inhibition, which may normally serve as a protective physiological mechanism.

Cortical augmenting in alexithymic subjects after unpleasant acoustic stimulation. Publishing Authors By Initials

R ,C Schneider,W Tress,M Franz,R Schäfer,C Schneider,W Tress,M Franz,

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Cortical augmenting in alexithymic subjects after unpleasant acoustic stimulation. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of psychosomatic research

VOLUME: 63

Page Numbers: 357-64

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ISSN: 0022-3999

DAY: 1

MONTH: Oct

YEAR: 2007

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LANGUAGE: eng

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AFFILIATION: University Clinic of Duesseldorf, Clinical Institute of Psychosomatic Medicine and Psychotherapy, Duesseldorf, Germany. schaefra@uni-duesseldorf.de

Country: England

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MEDLINETA: J Psychosom Res

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