Jun Suzurikawa

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Light addressing is an emerging and sophisticated technique that can induce pinpoint and/or patterned neuronal activation in cultured neurons. We previously developed a light-addressable electrode using hydrogenated amorphous silicon (a-Si:H), which was sandwiched between a tin oxide (SnO(2)) substrate and a passivation layer of zinc antimonate(More)
Individual neurons are heterogeneous and have profound impact on population activity in a complex cortical network. Precise experimental control of the firing of multiple neurons would be therefore beneficial to advance our understanding of cell-network interactions. Except for direct intracellular stimulation, however, it is difficult to gain precise(More)
This paper provides a detailed process flow for fabricating an easy-to-prepare, inexpensive, dense array of tungsten microelectrodes. We designed the process flow to minimize routine tasks by separating an initial preparation of a master mold from a routine preparation of substrate replication, array assembly and tip processing. Sandblast processing first(More)
Recently, intrinsic signal optical imaging has been widely used as a routine procedure for visualizing cortical functional maps. We do not, however, have a well-established imaging method for visualizing cortical functional connectivity indicating spatio-temporal patterns of activity propagation in the cerebral cortex. In the present study, we developed a(More)
INTRODUCTION In order to electrochemically and/or electrophysiologically monitor in-situ activities of cultured cells adhering on a substrate, micro-electrode arrays (MEAs) patterned on the substrate have been utilized. MEAs allow non-invasive and multisite monitoring with the fine temporal resolution. However, the spatial resolution of MEAs is limited by(More)
Electrical stimulation that can reorganize our neural system has a potential for promising neurorehabilitation. We previously demonstrated that temporally controlled intracortical microstimulation (ICMS) could induce the spike time-dependant plasticity and modify tuning properties of cortical neurons as desired. A 'pairing' ICMS following tone-induced(More)
Individuals with spinal cord injuries often experience thermoregulation disorders as well as sensory and motor disabilities. In order to prevent such individuals from becoming hyperthermic, we developed a body heat removal system (BHRS) with thermoelectric devices. Our BHRS comprises four Peltier devices mounted on a wheelchair backrest and continuously(More)
To comprehensively evaluate the usability and safety of a power wheelchair (PWC), monitoring multimodal data related to the PWC in a real environment is crucial. In most studies exploring actual wheelchair conditions, modification of PWCs has been required. Especially modification of controlling circuits aiming for measurement of joystick operation may lead(More)
BACKGROUND In answer to the increasing demand for care by the Japanese oldest portion of the population, an extensive programme of life support robots is under development, advocated by the Japanese government. Roboticbed<sup>®</sup> (RB) is developed to facilitate patients in their daily life in making independent transfers from and to the bed. The bed is(More)