ISSN: 1300-0292
İndekslendiği Dizinler: SCIENCE CITATION INDEX EXPANDED
CINAHL, Index Copernicus,
Chemical Abstracts (CA),
Excerpta Medica / EMBASE
Dil: Türkçe, İngilizce
İçerik: Orijinal Araştırma, Derleme, Editöre Mektup, Olgu Sunumu, Tıp Eğitimi, Tıbbi Kitap İncelemeleri
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Hemispheric Asymmetry: Unilateral Stimulation,bilateral Electrodermal Activity
Ferhan ESEN*
*Yrd.Doç.Dr., Osmangazi Üniversitesi Tıp Fakültesi Biyofizik AD, ESKİŞEHİR
Research in cerebral laterality supports the idea of functional differences between the left and right hemispheres and suggest that a component of autonomic nervous system, electrodermal activity (EDA), is also lateralized. To evaluate the bilateral asymmetries in palmar EDA and the usefulness of EDA parameters as indices of relative hemispheric activation, skin resistance level (SRL), skin resistance response (SRR) and the SRR latency (L) were examined in 25 right-handed male subjects. We used bilateral recording with a unilateral stimulation (auditory click/patellar tendon tap) to assess the asymmetries of EDA variables related to the side of stimulation and to handedness. No significant asymmetry in EDA (SRR/SRL) were found but significant differences in latency were observed. Ipsilateral responses were faster than contralateral responses for auditory stimulus and this result suggest that the human bilateral EDA is under ipsilateral control when limbic structures are stimulated. Response latency to motor activation were smaller in dominant hand, regardless of the stimulation site used. This result indicates that the left basal ganglia were more active than the right for right handers. Results underline the importance both of the cortical and peripheral influences on EDA but argue against the existence of single cortical mechanism modulating the asymmetries in the latency of this response.Keywords: Bilateral EDA, Latency, Hemispheric asymmetry.Turkiye Klinikleri J Med Sci 2002, 22:82-86
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