APPARATUS TO DERIVE ACOUSTICALLY EVENTED BRAIN POTENTIALS.

摘要

Apparatus for deriving acoustically evoked brain potentials in the audiometry of the spinal bulb, with a number of electrodes (21,22) placed on the subject's head comprising at least one bypass electrode (21) and a reference electrode (22 ) placed on the most distanced side of it, as well as an electroacoustic transducer (30,35) as a stimulus emitter for acoustic stimulation of the ear, where the electrodes and the transducer are connected to a signal emitter / analyzer unit ( 1) that drives the transducer with electrical signals of stimuli and that analyzes the potentials derived from the electrodes, characterized in that the electrodes (21,22) are grouped in an electrode unit (2) that shows a frame (10,11,12 ) relatively rigid, which keeps the electrodes in a spatial orientation defined relative to each other and makes it possible to hold the electrode unit on the head of the subject mi At the same time, all the electrodes are arranged at the corresponding drop points, because an electro-acoustic transducer (30, 35) also serves as a free-field speaker, an earpiece for insertion, a probe for otoacoustic emissions that contains a loudspeaker or a headset with conductance by bones