title: Selective visual dimension weighting deficit after left lateral frontopolar lesions.
abstract: The left lateral frontopolar (LFP) cortex showed dimension change-related activation in previous event-related functional magnetic resonance imaging studies of visual singleton feature search with non-brain-lesioned participants. Here, we tested the hypothesis that LFP actively supports changes of attention from the old to the new target-defining dimension in singleton feature search. Singleton detection was selectively slowed in this task when the target-defining dimension changed in patients with left LFP lesions, compared with patients with frontomedian lesions as well as with matched controls without brain lesions. We discuss a potential role of LFP in change detection when the optimal allocation of dimension-based attention is not clearly defined by the task.
authors.affiliation: University of Magdeburg, Germany. stefan.pollmann@nat.uni-magdeburg.de
authors.forename: S
authors.initials: S
authors.lastname: Pollmann
authors.forename: K
authors.initials: K
authors.lastname: Mahn
authors.forename: B
authors.initials: B
authors.lastname: Reimann
authors.forename: R
authors.initials: R
authors.lastname: Weidner
authors.forename: M
authors.initials: M
authors.lastname: Tittgemeyer
authors.forename: C
authors.initials: C
authors.lastname: Preul
authors.forename: H J
authors.initials: HJ
authors.lastname: Müller
authors.forename: D Y
authors.initials: DY
authors.lastname: von Cramon
mesh_terms: D000328:Adult; D000368:Aged; D017542:Aneurysm, Ruptured / Q000523:psychology; D001288:Attention / Q000502:physiology; D001930:Brain Injuries / Q000523:psychology; D001932:Brain Neoplasms / Q000150:complications / Q000523:psychology; D003072:Cognition Disorders / Q000209:etiology* / Q000473:pathology / Q000523:psychology*; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D002532:Intracranial Aneurysm / Q000523:psychology; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010775:Photic Stimulation; D017397:Prefrontal Cortex / Q000293:injuries* / Q000473:pathology; D014796:Visual Perception / Q000502:physiology*