| 摘要 |
The apparatus is used for testing the observation and reaction capability of a patient. It consists of an annular, symmetrical rotating disc (1), with a track (2) round which a ball bearing thrown onto it, will travel. The ball bearing is contained within the track (2), by a projecting ring (1) mounted on the exterior of the disc, and an annular rib (4) which surrounds central compartments (6) arranged in a circle around the axis of the disc. The track (2) has the form of lateral surface of a frustrum of a cone and presents at least one concentric markek circle (8, 9). The angle of the cone and/or the radius of the marked circle are chosen so that the points of intersection of the ball bearings trajectory with the marked circle and the annular rib, are in an axial plane. |
