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The Manner of Processing Sequential Stimuli in the Early Visual Areas of Human

Author: WangGuoQing
Tutor: LiHong
School: Southwestern University
Course: Basic Psychology
Keywords: Lower viewport Continuous stimulation Information signs
CLC: B842
Type: Master's thesis
Year: 2011
Downloads: 20
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Abstract


How about the low-level visual areas processing visual stimuli continuous input, and now there are two opposing views. The traditional model, it is considered continuous input of the visual information processing by picture by picture (frame-to-frame) low visual manner is processed. This means that the information in the low visual area is a processing place, the information in a very short time (a few milliseconds) to be processed within, and then spread advanced visual area. In the low-level visual areas to stimulate not leave any message traces. From a psychological point of view this has been continued to the present. However, recent animal study challenges the traditional model. Experimenter using multi-electrode recording techniques, recording the cat's visual cortex V1 cortex neurons about 100, is used to analyze the time course of stimulus-related information. Then in 100 ms to 700 ms intervals, to a maximum of three consecutive cat presents different capital letters. By means of this recording, the experimenter that in the cat primary visual cortex stimulation attribute exists distributed transient memory, and thus that the primary visual cortex in the cat visual stimulation for continuous processing of the input using the continuous stimulation of time information. This shows that the primary visual cortex of the cat is not for continuous stimulation to the traditional view that assumed by picture-by-picture approach to be processed. Computer simulation similar to a small number of neurons, and the related circuit connecting a simple (linear) of the processing unit circuit theoretical analysis, has been shown with a circuit trace information computing power because they can integrate different information stimulation time . However, low-level human visual area is how to process continuous stimulation, and until today we do not know. Another issue concerns the aspects of sensory memory. Sensory memory comfortable Sperling proved later, on a physiological basis and there is no experimental proof. If we could have a lower visual area \The problem for our understanding of the way the brain processing is very important, because the information in the low visual areas of the lack of evidence of traces have severely limited the visual cortex of the lower processing methods speculation. We confirm whether there is information in the visual processing traces exist to achieve the above two objectives. We continuously presents the same or different stimuli to examine whether the previous stimulus was presented stimuli rear impact. If the impact of the presence of traces of providing the information will be strong evidence. If you do not have an impact, it is the continuous stimulation by picture-by-picture processing to provide supporting evidence. FMRI experiment to find out first with a low-level visual cortex can activate only the stimulus, and then use two identical continuous stimulation of the ERP waveform information to detect differences in the presence of traces. Our results demonstrate that stimulation of low-level visual areas in the information will be retained traces stimulate approximately 700-800 milliseconds. In other words, lower visual areas of the continuous input of the processing of stimuli in the calculation of the time interval between stimuli. Second experiment, we used the same paradigm that low-level visual areas of the continuous input of the processing of stimuli in the calculation of both the spatial position difference between stimuli and physical properties of the differences. Our results show that low-level visual areas in a very complex processing methods to stimulate the continuous input of the processing, the traditional assumption of continuous stimulation by-frame analysis of the way the model is a challenge. In our experiments, we demonstrate that low-level visual areas retains traces of stimulus information about 700 milliseconds to 800 milliseconds. This sensory memory retention time is very close. Given the impression of memory decline over time in this experiment is similar to the memory and impression for masking sensitive, we can speculate that they belong to one kind of related mechanisms.

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