Document Type


Publication Date


Publication Title

Frontiers in Human Neuroscience


Department of Psychological and Brain Sciences


Simultanagnosia is a disorder of visual attention that leaves a patient’s world unglued: scenes and objects are perceived in a piecemeal manner. It is generally agreed that simultanagnosia is related to an impairment of attention, but it is unclear whether this impairment is object- or space-based in nature. We first consider the findings that support a concept of simultanagnosia as deficit of object-based attention. We then examine the evidence suggesting that simultanagnosia results from damage to a space-based attentional system, and in particular a model of simultanagnosia as a narrowed spatial window of attention. We ask whether seemingly object-based deficits can be explained by space-based mechanisms, and consider the evidence that object processing influences spatial deficits in this condition. Finally, we discuss limitations of a space-based attentional explanation.



Original Citation

Dalrymple KA, Barton JJ, Kingstone A. A world unglued: simultanagnosia as a spatial restriction of attention. Front Hum Neurosci. 2013 Apr 17;7:145. doi: 10.3389/fnhum.2013.00145. PMID: 23616758; PMCID: PMC3627977.