Presentation 2006/10/19
Hemodynamic responses corresponding to the stimulated visual field : measurements with 24 channel NIRS
Shuichiro TAYA, Goro MAEHARA, Haruyuki KOJIMA,
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Abstract(in English) We measured the hemodynamic responses in the occipital regions during visual stimulation with near-infrared spectroscopy (NIRS). The stimulus was a radial checker pattern (12 deg in radius) of which contrast reversed at 7.5Hz, and was presented to the whole or one quadrant of the visual field. In each measurement session, a 15s stimulating period and a 30s resting period were repeated five times. Hemodynamic changes at the occipital regions were measured with 4×4 probes which were separated from each other by 3cm. The results of the two-session measurements for each visual field showed that oxy-hemoglobin (Hb) concentration increased whereas deoxy-Hb concentration decreased during the stimulating period. Those changes in the Hbs were corresponding to the stimulated visual field, but only when the lower quadrants were stimulated.
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Keyword(in English) near-infrared spectroscopy / NIRS / hemodynamic responses / visual area / retinotopy
Paper # HIP2006-53
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Conference Date 2006/10/19(1days)
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Language JPN
Title (in Japanese) (See Japanese page)
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Title (in English) Hemodynamic responses corresponding to the stimulated visual field : measurements with 24 channel NIRS
Sub Title (in English)
Keyword(1) near-infrared spectroscopy
Keyword(2) NIRS
Keyword(3) hemodynamic responses
Keyword(4) visual area
Keyword(5) retinotopy
1st Author's Name Shuichiro TAYA
1st Author's Affiliation Graduate school of human and socio-environment studies, Kanazawa University()
2nd Author's Name Goro MAEHARA
2nd Author's Affiliation Graduate school of human and socio-environment studies, Kanazawa University
3rd Author's Name Haruyuki KOJIMA
3rd Author's Affiliation Faculty of letters, Kanazawa University
Date 2006/10/19
Paper # HIP2006-53
Volume (vol) vol.106
Number (no) 328
Page pp.pp.-
#Pages 4
Date of Issue