Patent ID: 8588883

Claim:
Apparatus for monitoring muscle activity related to bruxism, said apparatus comprising: an electrode assembly for providing signals indicative of said muscle activity, means for processing said signals in order to detect said bruxism, and means for providing a feedback signal to said electrode assembly in response to detecting said bruxism; wherein said electrode assembly comprises three electrodes in a fixed spatial relationship one to another, each electrode having a contact area for electrical connection with the skin which is spaced from the contact area of each other electrode in the electrode assembly by at least 2 mm, the maximum distance from an edge of one electrode contact area to the furthest edge of the furthest away of the other electrode contact areas being not greater than 60 mm, wherein the electrodes are arranged such that centres of said electrodes lie on a line which is an arc of a circle having a radius of from 60-200 mm, wherein the contact areas of the electrodes extend along or on said line a distance of from 3 to 7 mm from one side to an opposite side of the electrode contact area, and wherein the contact areas of the electrodes extend transversely of said line by a distance of from 3 to 7 mm from one side to an opposite side of the electrode contact area.