[Quantification of the gnostic sensitivity via measurement of the vibration threshold and of finger tip sensation]. / Kwantificeren van gnostische sensibiliteit door het meten van de vibratiedrempel en van de vingertopsensatie.

OBJECTIVE: Quantification of vibration perception and fingertip sensation in routine neurological examination. SETTING: Neurological Clinic, University Hospital, Groningen, the Netherlands. DESIGN: Prospective, controlled investigation. METHODS: Vibration perception and fingertip sensation were quantified in a large group of normal control persons of various ages and in neurological patients and compared with the usual sensory tests at routine neurological examination. The vibration perception limit was measured with a biothesiometer without accelerometer, the fingertip sensation with a device for two-point discrimination slightly modified according to Renfrew ('Renfrew meter'). Concordance of the tests was studied by calculating kappa values. RESULTS: The normal values of both sensory qualities had a log-normal distribution and increased with age. The values obtained with the Renfrew meter correlated well with those of the two-point discrimination and stereognosis but were systematically higher than those indicated by Renfrew. CONCLUSION: Both methods appear useful at routine neurological examination if certain measuring precautions are taken.