Selective visual dimension weighting deficit after left lateral frontopolar lesions.
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.
Pollmann
S
S
University of Magdeburg, Germany. stefan.pollmann@nat.uni-magdeburg.de
Mahn
K
K
Reimann
B
B
Weidner
R
R
Tittgemeyer
M
M
Preul
C
C
Müller
H J
HJ
von Cramon
D Y
DY
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*