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Difference of fMRI between the Tickling and Sensory Stimulation Using 3.0 Tesla MRI

3.0T 자기공명영상장치를 이용한 사람의 간지럼자극과 감각중추 자극의 활성화 차이

  • 강현수 (을지대학교 보건과학대학 방사선학과) ;
  • 임기선 (을지대학교 보건과학대학 방사선학과) ;
  • 한동균 (을지대학교 보건과학대학 방사선학과)
  • Published : 2010.02.28

Abstract

This study was performed to identify the cerebral network associated with sensation through the tickling stimulation, which is distinctive from the rest of other networks processing normal stimulation and to investigate the difference of laughing mechanism which is closely related to tickling using functional MRI(fMRI). A 16 healthy volunteers (mean age: 28.9) on a 3.0T MR scanner during two sensation conditions. Counterbalanced stimulus were presented across the participants, and the stimulation was used block design. Acquired data was analyzed by the statistical parametric mapping (SPM 99). Subject and group analysis was performed. Individual analysis showed the activation of somatic sensation area in both tasks and the tickling sensation test showed more activated area in the Wernicke's area(BA40) compared to the normal sensation. The group analysis result shows that under normal stimulations, both sides of somatosensory cortices(BA 1,2 and 3) were activated and under tickling stimulation, not only the cortices but also those huge activation on thalamus, cingulate gyrus and insular lobe were detected. When the tickling was stopped, significant activations were shown in right cingulate gyrus, left MFG area and left insular lobe. A cerebral area responsible for recognizing tickling sensation was examined and the primitive stimulation such as tickling is much closely related to laugh, which is an important factor for various social activities.

Keywords

Brain;Functional MRI;Tickling Stimulation;Function

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