The present invention relates to a magnetic stimulator arrangement for the magnetic stimulation of neuromuscular tissue. Magnetic stimulators of this kind achieve stimulation by the creation of a rapidly changing magnetic field in the vicinity of the tissue. Electric currents thereby induced in the tissue cause stimulation thereof. The present invention comprises a magnetic stimulator apparatus for the magnetic stimulation of neuromuscular tissue comprising a flexible conductor arranged to define a multiple turn coil and a light guide configured to preferentially fail in the event of at least partial failure of the conductor.
