翻訳と辞書 Words near each other ・ Palindromic prime ・ Palindromic rheumatism ・ Palindromic sequence ・ Paling ・ Paling in 't groen ・ Palinganatham ・ Palingenesis ・ Palingenetic ultranationalism ・ Palingenia longicauda ・ Palingeniidae ・ Palinges ・ Palings Building ・ Palink ・ Palinkopf ・ Palinode ・ Palinopsia ・ Palinovec ・ Palinstrophy ・ Palintropa ・ Palintropa hippica ・ Palintropa peregrina ・ Palintropus ・ Palinuro ・ Palinuro (ship) ・ Palinurus ・ Palinurus (disambiguation) ・ Palinurus (genus) ・ Palinurus barbarae ・ Palinurus charlestoni ・ Palinurus elephas Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Palinopsia ： ウィキペディア英語版 Palinopsia Palinopsia (Greek: ''palin'' for "again" and ''opsia'' for "seeing") is a visual disturbance defined as the persistent or recurrence of a visual image after the stimulus has been removed. Palinopsia is not a diagnosis, but a broad term that describes a heterogeneous group of pathological visual symptoms with a wide variety of etiologies. Visual perseveration is synonymous with palinopsia. In 2014, Gersztenkorn and Lee comprehensively reviewed all cases of palinopsia in the literature and subdivided it into two clinically relevant groups: illusory palinopsia and hallucinatory palinopsia. Hallucinatory palinopsia, usually due to seizures or posterior cortical lesions, describes afterimages that are formed, long-lasting, and high resolution. Illusory palinopsia, usually due to migraines, head trauma, prescription drugs, or hallucinogen persisting perception disorder (HPPD), describes afterimages that are affected by ambient light and motion and are unformed, indistinct, or low resolution. ==Differentiation from physiological afterimages== Palinopsia is a pathological symptom and should be distinguished from physiological afterimages, a common and benign phenomenon.〔 Physiological afterimages appear when viewing a bright stimulus and shifting visual focus. For example, after staring at a computer screen and looking away, a vague afterimage of the screen remains in the visual field. A stimulus consistently produces the same afterimage, which is dependent on the stimulus intensity and contrast, the time of fixation, and the retinal adaptation state. Physiological afterimages are usually the complementary color of the original stimulus (negative afterimage), while palinoptic afterimages are usually the same color as the original stimulus (positive afterimage). There is some ambiguity between illusory palinopsia and physiological afterimages since there are not concrete symptomatic criteria which determines if an afterimage is pathological. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Palinopsia」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.