RESUMO
Patients with lesions to the right parietal lobe were tested on their ability to reach to targets, or to respond verbally to targets. The targets occurred at the same two spatial locations--to the left and right of the patient--with the task being cued by the color of the target. Patients were able to perform both tasks separately rapidly and without error. However, when the two tasks were interleaved, they had difficulty making a response in the left (contralesional) field when this was different to a response that they had just made. These results suggest that lesions to the parietal cortex may cause a deficit in the coding for motor intention, as well as attention in the contralesional field.
Assuntos
Transtornos dos Movimentos/etiologia , Transtornos dos Movimentos/psicologia , Lobo Parietal/patologia , Idoso , Arteriopatias Oclusivas/complicações , Arteriopatias Oclusivas/patologia , Arteriopatias Oclusivas/psicologia , Isquemia Encefálica/complicações , Isquemia Encefálica/patologia , Isquemia Encefálica/psicologia , Transtornos Cerebrovasculares/complicações , Transtornos Cerebrovasculares/patologia , Transtornos Cerebrovasculares/psicologia , Feminino , Humanos , Embolia e Trombose Intracraniana/complicações , Embolia e Trombose Intracraniana/patologia , Embolia e Trombose Intracraniana/psicologia , Masculino , Pessoa de Meia-Idade , Artéria Cerebral Média/patologia , Paresia/complicações , Paresia/psicologia , Desempenho Psicomotor/fisiologia , Tempo de Reação/fisiologia , Tomografia Computadorizada por Raios XAssuntos
Responsabilidade Legal , Imperícia/legislação & jurisprudência , Erros Médicos/legislação & jurisprudência , Assistentes Médicos/legislação & jurisprudência , Médicos/legislação & jurisprudência , Humanos , Descrição de Cargo , Licenciamento/legislação & jurisprudência , Área Carente de Assistência Médica , Seleção de Pessoal/legislação & jurisprudência , Assistentes Médicos/educação , Assistentes Médicos/organização & administração , Autonomia Profissional , Estados UnidosRESUMO
Past inconsistencies in the occurrence of differential visual half-field Stroop effects were addressed in two experiments using a visual half-field presentation technique incorporating brief displays (100 ms) and a fixation task designed to ensure proper eye fixation at display onset. Experiment 1 used displays in which distractor words and color targets were presented in contralateral visual fields. Experiment 2 compared contralateral with ipsilateral displays where words and color targets appeared one above the other in the same visual field. Stroop effects were larger whenever a word occupied the right as opposed to the left visual field, regardless of whether the color target was left or right. Results are consistent with the idea that words are processed more efficiently or automatically in right visual field/left hemisphere presentations.
