| Abstrakt: |
Objective: To study memory span precisely in visual system, iconic memory after five minutes distraction was studied with a Necker's cube for senile dementia. Design: Clinical trial. Materials and Methods: One hundred and seven volunteers aged 69 to 97 years, 28 males and 79 females, participated in this study, after informed consent. One model figure of a Necker's cube was presented to subjects asking them to keep it in mind for a while. After the revised Hasegawa's dementia scale in around 5 minutes, subjects were asked to draw the figure in mind. In case who could not recall at all, after brief presentation of the model figure again, subjects were asked to draw it in mind after putting it out of sight. In case who drew incomplete cube, subjects were asked to draw it in observing the model figure. Then, an executive function (Trail Making Task) and a clock drawing task were tested, and subjects were asked to make their hands following examiner's hands figuring. Results: Scores of figures drew correlated better to the revised Hasegawa's dementia scale after 5 minutes distraction than those just after presentation and those observing the model figure. Conclusion: Recall test with a Necker's cube might be a quick and simple test for senile dementia, especially recall test after 5 minutes distraction was best sensitive. [ABSTRACT FROM AUTHOR] |
