Visual hemispatial inattention: stimulus parameters and exploratory strategies.
AUTOR(ES)
Weintraub, S
RESUMO
Patients with unilateral hemispheric lesions were given visual target cancellation tasks. As expected, marked contralateral and less severe ipsilateral visual inattention were observed in patients with right-sided cerebral lesions whereas those with left-sided lesions showed only mild contralateral neglect. Stimulus material (shapes vs letters) and array (random vs structured) interacted in a complex manner to influence target detection only in patients with right-sided lesions. Furthermore, the search strategy of these patients tended to be erratic, particularly when the stimuli were in an unstructured array. A structured array prompted a more systematic and efficient search. It appears, therefore, that stimulus content and spatial array affect neglect behaviour in patients with right-sided lesions and that a lack of systematic visual exploration within the extrapersonal space is one factor that contributes to visual hemispatial inattention.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1032760Documentos Relacionados
- A note on inattention: Evidence from library services in São Paulo
- Antifungal agents: chemotherapeutic targets and immunologic strategies.
- Observations on alternative health strategies.
- Nursing research: historical background and teaching information strategies.
- Internet connectivity for hospitals and hospital libraries: strategies.