T. Tsukiyama

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Electrical potentials within the thalamus associated with the endogenous late positive component (LPC or P300) of cerebral evoked potentials were investigated in humans and cats. Essentially identical discrimination tasks using classical aversive conditioning were employed for recording LPC in both species. In humans, a negative wave within the same latency(More)
To clarify functional neural pathways originating from the thalamic nucleus ventralis posterolateralis (VPL) in humans, the responses of regional CBF (rCBF) and regional CMRO2 (rCMRO2) to VPL stimulation were investigated by positron emission tomography in five patients who had undergone chronic implantation of electrodes into the VPL for therapeutic(More)
Several studies have described a correlation between subjective pain report and late positive components (LPCs) of cerebral evoked potentials occurring with latencies ranging from 150 to 400 msec after the onset of painful stimuli. We report here human subjects with brain lesions who revealed very small LPCs in response to painful electrical skin stimuli(More)
Crown width/length ratios have been considered an important aspect in the esthetic zone. Because previous investigations focused on Caucasian populations, limited information is available on other ethnic groups to propose a comprehensive approach to anterior maxillary teeth. The purpose of this study was to analyze the dimensions of anatomical crowns of(More)
  • T. Tsukiyama
  • 1991
The authors describe a method for finding the 3-D relation between primary plane surfaces in indoor scenes. An indoor scene illuminated by tubular fluorescent lamps and an imaging system like a TV camera were modeled based on lighting engineering knowledge. The 3-D relation between two object surfaces was identified by using the center position of(More)
A case with unilateral symptoms of Parkinson syndrome is presented in which interesting changes in the topographic patterns of cerebral blood flow (CBF) and cerebral metabolic rate for oxygen (CMRO2) were observed by positron emission tomography. This case was associated with severe tremor at rest exclusively in the left extremities. The parietal CBF and(More)
Occurrence of tumor of pineal region in three brothers was presented and previously reported cases of familial occurrence of primary intracranial tumor were reviewed. Two cases were diagnosed as germinoma clinically. The other case was diagnosed as embryonal carcinoma by pathohistological examination. All cases were of germ cell tumor. Reports of pineal(More)
Although the therapeutic effect of spinal cord stimulation (SCS) for spastic movement disorders is still controversial, its effect for multiple sclerosis has been supported by several authors. Among various clinical beneficial effects, reduction of the spasticity may be attractive for physical therapy of post-apoplectic patients. Two patients suffered from(More)