INTRODUCTION AND OBJECTIVES The power spectral density can be used to find a hidden behaviour in a physical system. We studied postural behaviour in a healthy population, by means of power spectral density, and compared it with a situation of complete immobility. METHODS A group of healthy volunteers carried out the modified Clinical Test for Sensory… (More)
In 1905 Barany analyzed the nystagmus that appears during the irrigation of the ear with cold and hot water, justifying the phenomenon due to convectives currents in the horizontal semicircular canal. This hypothesis has been widely accepted until doubt was casted on it by the experiences carried out in the Skylab. Of the various mechanisms that could be… (More)
The recording of auditory brain stem potentials (ABR) with bimastoid leads and bilateral stimulation makes it possible to evaluate relative cochlear function and the type of hearing loss. The theoretical background for this technique and the results obtained in patients with disease of the internal-middle ear, cochlea, and auditory nerve are discussed.