Masao Okura

Sexual intercourse as a precipitating factor of transient global amnesia.

Abstract: A Japanese female case of transient global amnesia (TGA), who developed an amnesic episode after sexual intercourse, is reported. The mechanism of how TGA in the present case is precipitated by sexual intercourse could be explained by the elevated blood pressure during sexual intercourse that drops rapidly, causing a temporal ischemia in the distribution of the basilar artery. Furthermore, the importance of sexual intercourse as a precipitating factor of TGA is stressed.

Electroencephalographic changes during and after water intoxication.

Abstract: A case of water intoxication with remarkable hyponatremia was investigated with a special reference to EEG changes during and after the episode. The patient recovered his EEG as his consciousness disturbance had improved through an intravenous infusion of high osmolality saline, correlating with the serum sodium level. Further, the clinical importance of recording EEG for water intoxication was stressed.

Recovery of high speed memory scanning after transient global amnesia: A case report

Abstract We described the case of a 59 year old female with transient global amnesia (TGA) who had been examined neuropsychologically using Sternbergs paradigm and a random number generation (RNG) task on the following day, 1 week and 4 weeks after a TGA episode. The slope value of the linear function, a measure of cognitive memory scanning speed, decreased with time and showed a marked decrease 1 week after TGA, suggesting that the stage of serial and exhaustive scanning recovered within 1 week. The zero‐intercept value, on the other hand, increased during 1 week but decreased 4 weeks later and was not related directly to recovery from TGA. The performance in RNG task improved 1 week later, but deteriorated 4 weeks after the episode. Such a change in RNG was in accordance with that of the zero‐intercept value, predicting a relationship. It is concluded that the subclinical memory deficit, detected with these tasks, persisted longer than clinical recovery from TGA.

Three year outcome of the residents in a special nursing home

Abstract The 3 year outcome of 48 residents in a special nursing home was investigated, using Hasegawas dementia rating scale (HDS) and activities of daily living (ADL). For all the residents, HDS score correlates well with age (P < 0.01) and ADL score (P < 0.001). Nineteen residents (40.4%) died during the period surveyed. Two‐thirds of the residents with low ADL score died during the period, whereas 70% of the residents with high ADL score are alive. Of these scales, ADL correlated well with the fatal prognosis, suggesting that ADL is a valuable prognostic tool. As for the causes of death, pulmonary disease was prominent (n= 12, 63.2%). Consequently, the prevention of pulmonary disease is needed to achieve a good outcome in the management of nursing home residents.

The Complex Episode of Transient Global Amnesia

Abstract: In most reports, Transient Global Amnesia (TGA) consisted of a single episode of total amnesia. The detailed investigation on the process of recovery from amnesia in the present two cases of TGA indicated the existence of a complex episode of TGA which consisted of a sequence of episodes of total amnesia.