The importance of sustained attention for patients with maculopathies

Altpeter, Elke; MacKeben, Manfred; Trauzettel‐Klosinski, Susanne

doi:10.1016/s0042-6989(00)00059-6

Cited by 120 publications

(108 citation statements)

References 16 publications

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“…A t test (p < .05) performed on the PFs of each frame orientation (horizontal or vertical) revealed larger PF for the frame presented in the horizontal (44 ms) than in the vertical orientation (34 ms, t(7) = 2.581; p = .04). These findings are similar to results of studies that have used RT tasks and have suggested different distributions of attention between the two meridians with greater concentration of attention on the horizontal than on the vertical meridian (Altpeter, Mackeben, & Treuzettel-Klosinski, 2000;Galera et al, 2005;Panagopoulos et al 2004). However, results manipulating visual restrictions and the displacement of attention indicate that such differences can be caused by visual factors, independent of the distribution of attention (Carrasco, Talgar, & Cameron, 2001).…”

Section: Discussionsupporting

confidence: 89%

“…Similar results of RT tasks suggest that the larger advantage found for the horizontal meridian can be the product of a greater distribution of attention along this meridian (Altpeter et al, 2000;Galera et al, 2005;Panagopoulos et al, 2004). But different results for a comparison of the horizontal and vertical meridians were also found by Carrasco et al (2001) who reported no difference between conditions where attention was displaced and those where it was not displaced along different meridians.…”

Section: Discussionmentioning

confidence: 77%

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Distribution of visual attention within a cued area: evidence based on temporal order judgments

Cavallet¹,

Galera²,

Grünau³

et al. 2011

Psicol. Reflex. Crit.

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Three experiments were performed to investigate the distribution of attention across the visual field and the possibility of attentional resources to be more concentrated inside an abrupt onset frame (cue). The participants performed a temporal order judgment task of two letters presented in sequence; one letter presented inside and the other outside the frame. The results showed that the information presented inside the frame had its perceptual latency shortened in relation to the information presented outside the frame in experimental conditions where the frame orientation, the distance between the two letters and the cue onset time were manipulated. The advantage of the information presented inside the frame was attributed to the displacement of attention to the area delimited by the frame. The results contribute to the understanding of visual perception, showing that attentional resources may be redistributed inside the borders of a geometric figure. Keywords: Visual attention; Cue; Border; Temporal Order Judgment Task. ResumoTrês experimentos foram realizados para investigar a distribuição da atenção pelo campo visual e a possibilidade dos recursos de atenção serem mais concentrados no interior de uma moldura (dica) de início abrupto. Os participantes realizaram uma tarefa de julgamento de ordem temporal de duas letras apresentadas em seqüência; uma letra apresentada dentro e a outra fora da moldura. Os resultados mostraram que a informação apresentada dentro da moldura teve a sua latência perceptual encurtada em relação à informação apresentada fora da moldura em condições experimentais onde a orientação da moldura, a distância entre as duas letras e o tempo de exposição da moldura foram manipulados. Esta vantagem para a informação apresentada dentro da moldura foi atribuída ao deslocamento da atenção para a área delimitada pela moldura. Os resultados contribuem para o entendimento da percepção visual, mostrando que recursos de atenção podem ser redistribuídos dentro das bordas de uma figura geométrica. Palavras-chave:

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 77%

Distribution of visual attention within a cued area: evidence based on temporal order judgments

Cavallet¹,

Galera²,

Grünau³

et al. 2011

Psicol. Reflex. Crit.

View full text Add to dashboard Cite

show abstract

“…Such patients may use the functional fovea with a ring scotoma for high-acuity tasks and use an eccentric location outside of the scotoma for other tasks. Finally, as mentioned earlier, PRL placement may relate to visual attention (Altpeter et al, 2000). The multiple PRL phenomenon may have mechanisms in common with switching attention among different peripheral areas in the visual field.…”

Section: Multiple Prlsmentioning

confidence: 77%

“…He et al (1996) found that attentional resolution, the finest separation of objects that allows isolated visual attention, was better in the lower visual field compared to the upper visual field. Altpeter et al (2000) asked 22 patients with macular diseases and 15 normally sighted participants to report the orientation (among 4 choices) of the character E at cued and attended locations in different parts of the visual field. Overall, the horizontal meridians yielded better performance than the vertical meridians.…”

Section: Performance-driven Explanation Of Prlmentioning

confidence: 99%

Functional and cortical adaptations to central vision loss

2005

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Age-related macular degeneration (AMD), affecting the retina, afflicts one out of ten people aged 80 years or older in the United States. AMD often results in vision loss to the central 15-20 deg of the visual field (i.e. central scotoma), and frequently afflicts both eyes. In most cases, when the central scotoma includes the fovea, patients will adopt an eccentric preferred retinal locus (PRL) for fixation. The onset of a central scotoma results in the absence of retinal inputs to corresponding regions of retinotopically mapped visual cortex. Animal studies have shown evidence for reorganization in adult mammals for such cortical areas following experimentally induced central scotomata. However, it is still unknown whether reorganization occurs in primary visual cortex (V1) of AMD patients. Nor is it known whether the adoption of a PRL corresponds to changes to the retinotopic mapping of V1. Two recent advances hold out the promise for addressing these issues and for contributing to the rehabilitation of AMD patients: improved methods for assessing visual function across the fields of AMD patients using the scanning laser ophthalmoscope, and the advent of brain-imaging methods for studying retinotopic mapping in humans. For the most part, specialists in these two areas come from different disciplines and communities, with few opportunities to interact. The purpose of this review is to summarize key findings on both the clinical and neuroscience issues related to questions about visual adaptation in AMD patients.

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“…Previous studies have attributed the HVA (Altpeter et al, 2000;Mackeben, 1999) and VA (Altpeter et al, 2000) to sustained attention. Given that the transient component of attention is considered to operate at an earlier stage of visual processing than the sustained component(e.g., Nakayama & Mackeben, 1989), before an attentional explanation is invoked, it is important to rule out the likely possibility-and more parsimonious explanation-that visual constraints also underlie the performance fields.…”

Section: Discussionmentioning

confidence: 94%