Riddoch syndrome

Riddoch syndrome (also known as the Riddoch phenomenon) is a form of visual impairment often caused by lesions in the occipital lobe which limit the sufferer's ability to distinguish objects. Only moving objects in a blind field are visible, static ones being invisible to the patient.[1] The moving objects are not perceived to have color or detail. The subject may only have awareness of the movement without visual perception of it (gnosanopsia),[2] or the general shape of a moving object may be perceivable as a shadow like outline.[3]

Riddoch syndrome
SpecialtyOphthalmology

At least one patient was able to use a rocking chair—putting non-moving surroundings in relative motion to her head—to improve her motion perception. She eventually was able to do the same with just voluntary movement of her head.[3]

See also

References
  1. Riddoch, George (1917). "Dissociation of visual perceptions due to occipital injuries, with especial reference to appreciation of movement". Brain. Oxford University Press. 40 (1): 15–57. doi:10.1093/brain/40.1.15.
  2. Zeki, Semir; ffytche, Dominic H. (1998). "The Riddoch syndrome: insights into the neurobiology of conscious vision". Brain. Oxford University Press. 121 (1): 25–45. doi:10.1093/brain/121.1.25. Retrieved 26 May 2014.
  3. All Things Considered. 26 May 2014. NPR. WAMU.


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