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The Change Of Attention Blink After Cerebellum Lesions

Posted on:2010-11-13Degree:MasterType:Thesis
Country:ChinaCandidate:Y B JiangFull Text:PDF
GTID:2155360278450226Subject:Neurology
Abstract/Summary:PDF Full Text Request
Attention blink is a deficit to identify a second target following a first target when both appeared in a rapid serial visual presentation (RSVP) task. Repetition blindness is an additional difficulty to recognize the second same target in RSVP task. Attention blink and repetition blindness have many phenomenal similarities, they can be experimental dissociated, and repetition blindness may reflect the visual information processing stage prior to the central limitation stages. Many studies suggested that the cerebellum be involved in cognitive functions, including attention blink. The fMRI studies showed that the cerebellum was activated in RSVP tasks, but it was not clear how the cerebellum involved in the mechanism of the attention blink in detail. In this study, we investigated the attention blink and repetition blindness performance in 10 patients with focal lesions of the cerebellum and 10 healthy controls using RSVP task. There are no differences of the performances of background test between the two groups. When T2 appears at Lag1, the T1 accuracy of the two groups in attention blink condition is lower than that in repetition blindness condition; The T1 accuracy of patients is lower than that of controls in attention blink condition. But when T2 appears at Lag3,Lag5,Lag7, the T1 accuracy between the two groups and two conditions is similar. Patients with cerebellum lesions demonstrated longer attention blink duration as well as larger magnitude compared with controls. The performance of repetition blindness is lower than that of attention blink in the control group, but there is no significant difference between attention blink and repetition blindness conditions of the patients. The performances of repetition blindness between two groups showed no significance. These data indicate that the cerebellum may be related to the central processing stage of the visual temporal attention. Also, we provide new evidence to support the idea that the cerebellum is involved in nonmotor functions.
Keywords/Search Tags:Cerebellum, Attention blink, Repetition blindness, Rapid serial visual presentation
PDF Full Text Request
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