Vision tells us not only what and where objects are but also when they appear and disappear. We have found that patients with right parietal damage have an unusual loss in the ability to differentiate object onset from offset. Specifically, when a single target flickers at the same frequency as five distractors, but out of phase (it is light when they are dark and vice versa), right parietal pa...

Cognitive and neuroscience studies indicate that attentional operations are impaired in Alzheimer's disease (AD). Our goal was to define the anatomical areas of activation associated with visual attention processing and to define deficits or changes that may occur in AD patients compared with control group. Thirteen AD patients and 13 age- and education-matched normal controls were tested in tw...

The aim of the experiment reported in this paper was to establish whether dyslectics have specific attentional problems. To this end the performance between a group of 12 adult dyslectics and 14 adult controls on a Posner task with endogenous attentional cuing was compared. In addition participants also made a number of clinically used pen and paper tasks. During the Posner task, EEG was measur...

BACKGROUND Inattention is a core clinical feature of delirium and yet the particular aspects of attentional impairment associated with this feature are poorly understood. Objective methods for assessing inattention are also lacking. A new set of computerised tests of attentional deficits designed for use in patients with delirium have been developed. Test performances in patients with delirium,...

Prominent deficits in spatial attention evident in patients with hemispatial neglect are often accompanied by equally prominent deficits in non-spatial attention (e.g., poor sustained and selective attention, pronounced vigilance decrement). A number of studies now show that deficits in non-spatial attention influence spatial attention. Treatment strategies focused on improving vigilance or sus...

Although a wealth of literature has examined the role of emotion-related factors in deliberate self-harm (DSH), less is known about neurocognitive factors and DSH. In particular, despite theoretical literature suggesting that deficits in executive attention may contribute to engagement in DSH, studies have not yet examined the functioning of this attentional network among individuals with DSH. ...

Although under some conditions the attention-related late positive event-related potential (ERP) response (LPC) is apparently normal in autism during visual processing, the LPC elicited by visuospatial processing may be compromised. Results from this study provide evidence for abnormalities in autism in two components of the LPC generated during spatial processing. The early frontal distributio...