Apparatus for stimulation with optical stimuli

Details Apparatus for stimulation with optical stimuli Apparatus for stimulation with optical stimuli

1988-07-22

1990-09-11

Green, Randall L.

Surgery

Truss

Pad

351243, 128745, A61B 504

Patent

active

049553895

ABSTRACT:
The apparatus serves for triggering optically evoked responses in the patient, and the response is acquired by means of a measuring equipment. The apparatus comprises a stimulation signal generator having a surface on which an optical stimulation signal is displayed, a waveguide having a first end and a second end, a first lens system for imaging the signal on the surface into the first end of the waveguide, a second lens system arranged at the second end for imaging the image at the second end onto a presentation surface and a mount for mounting the second lens system and presentation surface a fixed distance from the patient's eyes. In order to reduce possible magnetic interference with the measuring equipment, at least the mount, the second lens system and the waveguide are formed of non-magnetic material.

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Ehnholm et al., "A Seven Channel SQUID Magnetometer for Brain Research" Physica 107B, pp. 29-30, 1981.
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Von Ralph Norman Haber "Flugsimulation" Spektrum der Wissenschaft, Sep. 1986, pp. 56-64.
Stefan et al. "Biomagnetic Multichannel Measurements in the Pre-Operative Diagnostic Evaluation of Epilepsy" Electro Medica, vol. 57 4/89, pp. 129-133.
Stok, The Inverse Problem in EEG and MEG with Application of Visual Evoked Responses, Druk:Krips Repro Meppel, 1986, pp. 41-47.

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