| 摘要 |
PURPOSE:To measure a fine encephalomagnetism generated with execution of the go/on-go motion subject by using a light emitting element as a visual sense inducing means, wherein the wiring is made so as to cancel the variation of the magnetic field caused by turn-on/turn-off of the light emission, and furnishing a means to sense the encephalomagnetism and also a means to shield against the external magnetic field. CONSTITUTION:A visual sense induction part 1 is composed of a light emitting element part 3, a driver device 5, and leads 4 for them, wherein part of the light emitting element part 3 and leads 4 is located in a shield chamber 13. A encephalomagnetism sensing part 2 is of type incorporating a superconductive quantum interferential element and can sense a fine encephalomagnetic field. The shield chamber 13 shields against the terrestrial magnetism or magnetic fields generated by any electric device used in measuring the encephalomagnetism such as the driver device 5 or a signal processor 20. A constant current circuit makes constant the sum of currents flowing in three leads furnished in the light emitting element part 3. |
