“Sun Burst” Appearance and “Wagon Wheel” Signs—Classical Imaging in Calvarial Hemangioma
نویسندگان
چکیده
منابع مشابه
The wagon-wheel illusion in continuous light.
The fact that a perceptual experience akin to the familiar wagon-wheel illusion in movies and on TV can occur in the absence of stroboscopic presentation is intriguing because of its relevance to visuo-temporal parsing. The wagon-wheel effect in continuous light has also been the source of considerable misunderstanding and dispute, as is apparent in a series of recent papers. Here we review thi...
متن کاملPredicting perception of the wagon wheel illusion.
Stroboscopic illumination of a rapidly rotating disk with radial spokes leads to a range of different stationary and moving images as the angular rotation frequency of the disk and the strobe frequency are varied. We compare predictions from the standard correlation model of motion perception with a model based on phase locking observed during periodic stimulation of an integrate-and-fire nonli...
متن کاملThe wagon wheel illusion in movies and reality.
Wheels turning in the movies or in other forms of stroboscopic presentation often appear to be rotating backward. Remarkably, a similar illusion is also seen in continuous light. The occurrence of this perception in the absence of intermittent illumination suggests that we normally see motion, as in movies, by processing a series of visual episodes.
متن کاملA unique case of calvarial hemangioma
BACKGROUND Calvarial hemangiomas are one of the rarest neoplasms affecting the skull, predominantly occurring in parietal and frontal bones. CASE DESCRIPTION We report a parietal hemangioma in a middle-aged female which presented as a painless swelling that was progressively increasing in size and was treated surgically. CONCLUSION Although rare, calvarial hemangioma should be a part of the...
متن کاملThe continuous Wagon Wheel Illusion is object-based
The occurrence of perceived reversed motion while observers view a periodic, continuously moving stimulus (the "continuous Wagon Wheel Illusion") has been taken as evidence that some aspects of motion perception rely on discrete sampling of visual information. The spatial extent of this sampling is currently under debate. When two separate motion stimuli are viewed simultaneously, the illusion ...
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ژورنال
عنوان ژورنال: Journal of Neurosciences in Rural Practice
سال: 2020
ISSN: 0976-3147,0976-3155
DOI: 10.1055/s-0040-1715542