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Interaction between motor areas of the right and left hemispheres of the brain is important for generating bilateral coordinated movements. We investigated how bilateral coupling, which results from the interhemispheric interaction, is modulated during coordinated movements. We tried to estimate coupling and stability of bilateral movements during continuous movements of the right and left index fingers...
Humans are remarkable in their ability to adapt to changes in the dynamics of a movement. The mechanisms by which the brain controls body movements are important in the fields of robotics and neurosciences. Robots are largely used to study the adaptive properties of human motor system. If rehabilitation robots are used in conjunction with techniques for functional brain imaging, in principle the motor...
In daily life, humans must compensate for the resultant force arising from interaction with the physical environment. It has been shown that humans can acquire a neural representation of the relation between motor command and movement, i.e. learn an internal model of the environment dynamics. For example, Shadmehr et al have analyzed various reaching movements under velocity-dependent force field...
This paper describes a few examples of small antennas for medical applications particularly for interstitial and intracavitary microwave hyperthermia. We have demonstrated heating patterns around the coaxial-dipole antenna for the treatment of brain tumor. Then we have shown the investigation of heating performances of the coaxial-slot antenna for treatment of bile duct carcinoma. As a further study,...
MR compatible apparatus is essential to design new tasks for fMRI study. This paper described the development of an MR compatible manipulandum actuated by the ultrasonic motors, which was able to work within MRI scanner and to perform fMRI task continuously during finger movements. The prototype of manipulandum was able to produce two discriminable force fields: position dependent and velocity dependent...
Hyperthermia is one of the modalities for cancer treatment, utilizing the difference of thermal sensitivity between tumor and normal tissue. The authors have developed a coaxial-slot antenna for microwave hyperthermia. In this paper, calculated results of temperature distributions around the coaxial-slot antenna for the treatment of brain tumor and bile duct carcinoma are described
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