Abstract: A sensor (30) for measuring a biological potential of an individual, comprising: a measurement electrode (31) comprising a base (32), at least one leg intended to come into contact with an anatomical zone of the individual and at least one electrical connection member (38), at least one locking member (45) configured to cooperate in a reversible manner with at least one complementary locking member (25) on an external support (10) so as to removably fasten the sensor (30) to the external support (10), the locking member (45) being separate from the electrical connection member (38), a protection element (40) made from a resilient material and delimiting a recess (41) in which the leg extends.

Abstract: The invention relates to a system for characterising the sleep of an individual, the characterisation system comprising: a measuring device for measuring a brain activity signal representing the brain waves; a central electronic unit for identifying, in a range of frequencies of between 9 and 16 Hz, a smaller range of sleep spindles of the individual, the smaller range of sleep spindles comprising the brain wave frequencies of the sleeping individual, having an amplitude higher than 15 ?V and a duration of between 0.5 seconds and 2 seconds, and comparing, with a threshold, at least one parameter of the brain activity signal of the awake individual in the range of frequencies corresponding to the smaller range of sleep spindles; and a communication interface connected to the central unit and used to emit a warning signal perceptible by the individual when the parameter of the brain activity signal in the range of frequencies corresponding to the smaller range of sleep spindles exceeds the threshold.

Abstract: The present disclosure relates to an acquisition device intended to be positioned on the head of a user in order to perform an encephalogram. The device comprises at least one acquisition electrode (32, 34, 33) configured in order to be positioned in contact with the head of the user at at least any one of the positions of the international 10-20 system, so as to acquire at least one brain activity signal representative of the brain waves of the user and at least one first and one second means of adjusting the position of the acquisition electrode in a first and a second plane, respectively.