Chapter

The Blind Leading the Mind: Pathological Visual Completion in Hemianopia and Spatial Neglect

Jason B. Mattingley and Robin Walker

in Filling-In

Published in print April 2003 | ISBN: 9780195140132
Published online May 2009 | e-ISBN: 9780199865307 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780195140132.003.0011
 The Blind Leading the Mind: Pathological Visual Completion in Hemianopia and Spatial Neglect

Show Summary Details

Preview

This chapter focuses on a visual anomaly that arises after unilateral damage, in which patients claim to see a complete visual shape even though a substantial portion of the stimulus falls within an objectively blind region of their contralesional visual field. This phenomenon, known as pathological visual completion, was first described by Poppelreuter in 1917, and has been the subject of numerous investigations by psychologists and neuroscientists. Recently, the phenomenon has received renewed attention due to advances in understanding the neurophysiological mechanisms underlying perceptual completion in the normal visual system. The chapter provides a historical account of Poppelreuter's pioneering work and then critically reviews previous studies of pathological visual completion, highlighting some of their methodological and theoretical shortcomings. Finally, it proposes a framework for understanding pathological visual completion and suggests possible avenues for future research.

Keywords: blind spot; visual field; visual completion; unilateral damage; contralesional visual field; Poppelreuter

Chapter.  8178 words.  Illustrated.

Subjects: Neuroscience

Full text: subscription required

How to subscribe Recommend to my Librarian

Buy this work at Oxford University Press »

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.