How is akinetopsia caused?

Akinetopsia is an acquired defect of visual motion perception caused by acquired cerebral lesions. A variety of defects can result, including defective smooth pursuit eye movements and identification of objects defined by movement cues (structure-from-motion or kinetic depth).

What does a person with akinetopsia see?

Patients with akinetopsia say that smooth movements of objects appear as a discontinuous freeze frame image [2]. Therefore, patients have difficulty, for example, in pouring tea into a cup because the fluid appears to be frozen, like a glacier [3].

Can akinetopsia be cured?

Due to the rare nature of this condition, there is currently no effective treatment or cure for akinetopsia.

What is akinetopsia psychology?

n. inability to see objects in motion as a result of damage to the V5 area of visual cortex. Individuals with akinetopsia perceive moving stimuli as a series of stationary strobelike images and see visual trails behind moving objects. Also called motion agnosia.

What is damage in optic ataxia?

inability to direct the hand to an object under visual guidance, typically caused by damage to the cortex of the parietal lobe.

What causes Simultagnosia?

Causes. Simultanagnosia results from bilateral lesions to the junction between the parietal and occipital lobes. These lesions could result from a stroke or traumatic brain injury. It is also possible for simultanagnosic symptoms to develop from degenerative disorders.

What part of the brain is damaged in Akinetopsia?

Akinetopsia is thought to be associated with damage to the V5 medial temporal (MT) portion of the brain, involving the tempro-parieto-occipital junction. It is mostly secondary to bilateral disease however has been described in unilateral lesions.

What is the opposite of akinetopsia?

In this case report, we describe the opposite to akinetopsia. This has been variously termed statokinetic dissociation2 or Riddoch’s phenomenon3 and refers to appreciation of objects only once they move, whereas when static they are not seen or appreciated.

Is afterimage permanent?

Palinopsia (Greek: palin for “again” and opsia for “seeing”) is the persistent recurrence of a visual image after the stimulus has been removed. Palinopsia is not a diagnosis, it is a diverse group of pathological visual symptoms with a wide variety of causes….