|Budget Amount *help
¥1,500,000 (Direct Cost : ¥1,500,000)
Fiscal Year 1996 : ¥1,500,000 (Direct Cost : ¥1,500,000)
The objective of this research is to introduce new paradigms to test patients with brain damage in the association cortices. Paradigms were designed based on the results of animal experiments using monkeys. Since invasive techniques are impossible for human subjects, the functions of the association cortices have been studied in detail in monkeys. In these 25 years, data of such experiment were accumulated. It is now possible to refer such results to disign paradigms for human subjects. Five paradigms were introduced. (1) Simple visual reaching task : With pressing a button, a target cue was presented and a subject touched that target location. (2) Visual delayd reaching task : With pressing a button, a cue stimulus was presented for 1s. Then, after 5s of delay period, target stimuli appeared at all 8 locations. Subject's task is to select and touch the position where the cue stimulus was presented. (3) Attention shift task : With pressing a button two stimuli were presented. One stimulus is positive and the other is negative. The subject's task is to select positive stimulus. After 5 successive correct trials, the other stimulus became positive. After next 5 successive correct trials, a new stimulus set was introduced and reversal of this set was tested. and this process was repeated. (4) Oddity task : With pressing a button, eight stimuli were presented (7 same and 1 different stimuli) and a subject was asked to select different stimulus. (5) Delayd Matching to Sample task : With pressing a button, sample stimulus presented for 1s. After 5s of delay period, 8 stimuli were presented. The subject was asked to select the same stimulus as the sample stimulus. Using these paradigms, it became possible to test the functions of the association cortices more accurately.