Nexstim Oy

Marko Ollikainen

Juha Virtanen

Jarmo Ruohonen

Henri Hannula

Risto Ilmoniemi

Matti Aho

The invention relates to an electrode structure () for attachment to a more extensive measuring structure (), in order to measure electrical responses from the human body. The electrode structure () includes a conductive electrode (). According to the invention, the electrode () is shaped to be thin in the thickness direction of the electrode structure (), and the electrode structure () is equipped with a hole () and the electrode () is located at the edge of the hole (), in such a way that its longitudinal axis is essentially parallel to the plane of the measurement subject.

Electrode structure for measuring electrical responses from the human body

Disclosed is a method for producing a magnetic stimulation effect and/or a fake magnetic stimulation effect in a biological tissue. According to the method, the real magnetic stimulation is effected by virtue of inducing an electromagnetic field in said biological tissue with a sufficiently strong field strength to essentially excite said tissue, and the fake magnetic stimulation is effected by virtue of inducing an electromagnetic field in said biological tissue with a field strength that is weaker than the electromagnetic field required for an essential excitation of said tissue. According to the invention, said electromagnetic field weaker than the electromagnetic field strength required for an essential excitation of the tissue is produced by the steps of inducing at least one first electromagnetic field in said biological tissue and, simultaneously, inducing at least one second electromagnetic field superimposed with said first electromagnetic field but so deviated by its direction from the direction of said first electromagnetic that the sum effect of said electromagnetic fields in the target area of said biological tissue remains weaker than the electromagnetic field required for an essential excitation of said tissue. Also an apparatus is described suited for implementing the method.

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Helsinki, Finland

Marko Ollikainen