Spatio-temporal features of visual exploration in unilaterally brain-damaged subjects with or without neglect: Results from a touchscreen test

Marco Rabuffetti, Elisabetta Farina, Margherita Alberoni, Daniele Pellegatta, Ildebrando Appollonio, Paola Affanni, Marco Forni, Maurizio Ferrarin

Research output: Contribution to journalArticlepeer-review

Abstract

Cognitive assessment in a clinical setting is generally made by pencil-and-paper tests, while computer-based tests enable the measurement and the extraction of additional performance indexes. Previous studies have demonstrated that in a research context exploration deficits occur also in patients without evidence of unilateral neglect at pencil-and-paper tests. The objective of this study is to apply a touchscreen-based cancellation test, feasible also in a clinical context, to large groups of control subjects and unilaterally brain-damaged patients, with and without unilateral spatial neglect (USN), in order to assess disturbances of the exploratory skills. A computerized cancellation test on a touchscreen interface was used for assessing the performance of 119 neurologically unimpaired control subjects and 193 patients with unilateral right or left hemispheric brain damage, either with or without USN. A set of performance indexes were defined including Latency, Proximity, Crossings and their spatial lateral gradients, and Preferred Search Direction. Classic outcome scores were computed as well. Results show statistically significant differences among groups (assumed p

Original languageEnglish
Article numbere31511
JournalPLoS One
Volume7
Issue number2
DOIs
Publication statusPublished - Feb 8 2012

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

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