Patent ID: 7054680

Claim:
An apparatus for detecting brain electrical potentials on a patient, comprising: a breathing mask; a stiff tubular nonround member extending upwardly from said breathing mask and for supplying gas to said breathing mask; an electrode device which can be applied in the forehead region of the patient on said tubular member, the electrode device being arranged on a forehead support element of an elastomeric material which co-operates with the breathing mask in such a way that an application position of the electrode device is established in conjunction with the application position of the breathing mask, said forehead support element being transverse to said tubular member and having free ends on opposite sides of a central portion, said electrode device including at least one electrode element on each of said ends adapted to bear on the forehead region of the patient when said breathing mask is on the face of the patient and another electrode element on said central portion bearing on the forehead region, said breathing mask having a seal engaging the face of the patient around a nose and mouth region, a cavity surrounded by said seal and a drawn-in region receiving the nose of the patient and attached to the seal, the electrode elements being coupled to a signal processing device for processing brain signals.