P-2-04-09
Usefullness of Reaction Times in High-Cortical Recognition Tasks
Masaharu Maruishi(Inokuchi Hsp, Higashihiroshima, Japan), Akiteru Takagi(Hiroshima Univ, Hiroshima, Japan), Takeshi Shima (Chugoku Rousai Hsp, Kure, Japan), Yoshikazu Okada (Shimane Medical Univ, Izumo, Japan)
We compared reaction times for high-cortical recognition tasks with kana-searching test in a group of 46 normal individuals aged 21 to 83 who gain a full score in Mini-Mental Scale. The following tasks of reaction time were used; simple reaction time (SRT), choice reaction time (CRT), memory scanning time (MST), and visual searching time (VST). The results were consistent and demonstrated that mean reaction time of 46 individuals increased in difficult tasks such as MST or VST. All reaction times increased depending on aging, which became longer in difficult tasks. Score of kana- searching test was correlated with MST and VST, but did not correlate with SRT and CRT. These findings suggest that reaction times may be useful for mass-screening of high-cortical functions in different ages as well as the kana word searching test.
P-2-04-10
APRAXIA AND CEREBRAL HAEMORRHAGE: THE RELATIONSHIP BETWEEN HAEMATOMA VOLUME AND PROGNOSIS
Shinichiro Maeshima, George Truman, Dennis S. Smith (Rehabilitation Studies, University of Sydney & Royal Rehabilitation Centre), Nobuyuki Dohi (Hiroshima Prefectual College of Health Science and Welfare), Yoshiko Kuno (Fujita Health University), Kunio Nakai, Tom ltakura, Norihiko Komai (Wakayama Medical College)
In this study, we examined twenty-five patients with left putaminal haemorrhage to investigate the relations between ideational apraxia (IA) and intracerebral haemorrhage. Apraxias were determined at 1 and 6 months after the stroke onset. Extension and volume of haematoma were examined with CT scan within 2 days of stroke onset. IA was present in 10 cases at 1 month and disappeared in 6 cases (transient IA) and persisted in 4 cases (persisted IA) at 6 months from the onset. Although the haematoma volume related to the existence of IA, there was no significant difference in the volume between transient and persistent IA. All three patients who has a haematoma volume larger than 40 ml in the transient IA group were younger than 50 years old. All cases with persistent IA were older than 50 years old. Consequently, the existence of IA seems to be partially dependent upon the haematoma volume which may cause organic damage of subcortical white matter. However, patient's age is also important to determine the prognosis of IA. This maybe related to nature of the haemorrhage and this mode of the onset. These factors remain to be determined.
