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What Factors Mediate Individual Differences in Color Matching?
Atsushi Konno,Kunihiro Hatakeyama,Yuki Kawashima,Tomonori Tashiro,Takehiro Nagai,Yasuki Yamauchi 한국색채학회 2017 AIC 2017 Jeju Vol.2017 No.10
We aimed to specify physiological factors which mediate individual differences in color matching. In previous studies, we found that the deviations of the color matching for the red-green direction is correlated with the macular pigment density. However, the factors causing blue-yellow deviation were not clarified. In this study, we performed a color matching experiment using metamers with the identical tristimulus values and an identical amount of the macular pigment absorption to examine the deviations of the color matching in the blue-yellow direction. As a result, there was a correlation between color matching deviations and the amounts of light absorbed by lens for each metamer, suggesting that the deviations of color matching in blue-yellow direction may be due to the amount absorbed of lens. These results suggest that individual difference in color matching in short wavelength light is strongly mediated by these two physiological properties of the eye.
서동경(Dongkyung Seo),카와시마 쿠니히로(Kunihiro Kawashima),호리우치 카츠미(Katsumi Horiuchi),요시다 테츠노리(Tetsunori Yoshida) 대한두경부종양학회 2021 대한두경부 종양학회지 Vol.37 No.1
Schwannomas are benign tumors of neuroectodermal origin and can be found in any part of the body. Although schwannomas are common in the head and neck region, they are rare in the auricle. Auricular schwannomas are rarely symptomatic but the mass itself or a surgical procedure to remove it may disrupt the complicated structure of the auricle. We report a rare case of auricular schwannoma with a literature review and describe the surgical technique used in this case.
Free Flap Salvage in the Ischemic Foot: A Case Report
Dongkyung Seo,Yutaka Dannnoura,Riku Ishii,Keisuke Tada,Kunihiro Kawashima,Tetsunori Yoshida,Katsumi Horiuchi 대한성형외과학회 2022 Archives of Plastic Surgery Vol.49 No.5
We performed distal bypass and free flap transfer in a single-stage operation to repair an extensive soft tissue defect in an ischemic foot of an 84-year-old woman. The nutrient artery of the free flap was anastomosed to the bypass graft in an end-to-side manner. Subsequently, the bypass graft became occluded on several occasions. Although intravascular and surgical interventions were performed each time, the bypass graft eventually became completely occluded. However, despite late occlusion of the nutrient artery, the free flap has remained viable and the patient is ambulatory. The time required for a transplanted free flap to become completely viable without a nutrient artery is likely longer for an ischemic foot compared with a healthy foot. However, the exact period of time required is not known. A period of month was required in our patient. We report this case to help clarify the process by which a free flap becomes viable when applied to an ischemic foot.