An apparatus (10) for testing the sensory system in humans or animals comprising housing parts (12, 14) which are jointed together in volume defining manner to form a housing. The housing has a gap formed by recesses (64, 66) in the housing parts, and encloses a disc (26) having mounted thereon a plurality...http://www.google.de/patents/US4823806?utm_source=gb-gplus-sharePatent US4823806 - Apparatus for testing the sensory system on humans or animals
