akinetopsia
   Also referred to as cerebral akinetopsia and visual motion blindness. The term akinetopsia comes from the Greek words akinesia (absence of motion) and opsis (seeing). It was introduced in or shortly before 1991 by the British neurobiologist Semir Zeki to denote a selective deficit in the ability to perceive motion. Akinetopsia is an extremely rare condition attributed to bilateral cortical lesions in the vicinity of striate cortex. The first full description of visual motion blindness was formulated by the German neurologist Josef Zihl and colleagues, who in 1983 reported a case in which the individual affected was unable to see motion. As rendered by Zihl et al., streaming fluids were described as frozen, and people who were moving about as popping up here and there. Akinetopsia is generally classified as a * sensory distortion. Pathophysiolog-ically, it is associated with bilateral damage to the occipito-temporal area V5, the so-called specialized motion area of the visual cortex. Transient forms of akinetopsia can be induced by the use of psychotomimetic substances such as LSD and mescaline. When occurring as an *aura in the context of a paroxysmal neurological disorder such as migraine, transient forms of akinetopsia are referred to as * cinematographic vision. Conceptually as well as phenomenologically, akine-topsia constitutes the counterpart of *Riddoch's phenomenon (i.e. the inability to see stationary light stimuli, whereas the conscious perception of moving light stimuli remains intact). The term akinetopsia is used in opposition to the term kinetopsia. It should not be confused with the slide show format characteristic of some types of visual hallucinations or with the *quick-motion phenomenon, in which time appears to pass too quickly.
   References
   Zihl, J., Cramon, D., Mai, N. (1983). Selective disturbance of movement vision after bilateral brain damage. Brain, 106, 313-340.
   Zeki, S. (1991). Cerebral akinetopsia (visual motion blindness). Brain, 114, 811-824.

Dictionary of Hallucinations. . 2010.

Look at other dictionaries:

  • Akinetopsia — Akinetopsia, also known as cerebral akinetopsia or motion blindness, is an extremely rare neuropsychological disorder in which a patient cannot perceive motion in their visual field, despite being able to see stationary objects without issue. For …   Wikipedia

  • Akinetopsia — Saltar a navegación, búsqueda La akinetopsia es un desorden neurológico extraño relacionado con el sistema nervioso y las funciones mentales (en este caso con el cerebro y la percepción). Para tener una idea de cómo perciben el movimiento las… …   Wikipedia Español

  • akinetopsia — noun (motion blindness) is an inability to perceive motion, despite stationary objects remaining more or less visible, due to brain damage disrupting input to the dorsal pathway …   Wiktionary

  • cerebral akinetopsia —    see akinetopsia …   Dictionary of Hallucinations

  • Visual modularity — In cognitive neuroscience, visual modularity is an organizational concept concerning how vision works. The way in which the primate visual system operates is currently under intense scientific scrutiny. One dominant thesis is that different… …   Wikipedia

  • Mary's room — (also known as Mary the super scientist) is a philosophical thought experiment proposed by Frank Jackson in his article Epiphenomenal Qualia (1982) and extended in What Mary Didn t Know (1986). The argument is intended to motivate what is often… …   Wikipedia

  • Motion perception — The dorsal stream (green) and ventral stream (purple) are shown. They originate from a common source in visual cortex. The dorsal stream is responsible for detection of location and motion. Motion perception is the process of inferring the speed… …   Wikipedia

  • cinematographic vision —    The term cinematographic vision is indebted to the Greek words kinèma (movement) and graphein (to draw, to write, to etch, to paint). It was introduced in or shortly before 1970 by the British neurologist Oliver Wolf Sacks (b. 1933) to denote… …   Dictionary of Hallucinations

  • slide show format of visual hallucinations —    Also referred to as movie format of visual hallucinations. Both terms are used to convey the speed and recurrent discontinuities which characterize * visual hallucinations in some individuals. A rapid flow of images, as well as jumps from one… …   Dictionary of Hallucinations

  • Agnosia — For the Spanish film, see Agnosía. Agnosia Classification and external resources ICD 10 R48.1 ICD 9 …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”