Abstract: A local stimulation method of a predetermined region of brain tissue, the brain tissue including at least GABAergic neuron type. The method includes at least one activation step of a set of bipolar electrodes, according to a predetermined electric intensity and a predetermined biphasic pulse frequency, delivering a predetermined electric field. The predetermined electric field induces an activation of the GABAergic type neurons and a virtual absence of activation of other types of neurons.

Abstract: A system for estimating physical parameter(s) of a medium having electrolyte(s), including at least one working electrode; one counter electrode; a current generator delivering to the electrodes electric current pulses; a computer-readable memory including a predefined analytic model of an electric potential, between the working and counter electrodes, as a function of time, receiving as inputs the current and current pulse duration and including the physical parameter to be estimated; an acquisition unit including a signal amplifier for acquiring and amplifying an electric potential recorded by the electrodes; a processor including a stimulation module controlling the current generator to deliver a biphasic charge-balanced current during a stimulation duration; an acquisition module acquiring an electric potential variation during the stimulation duration; and a calculation module receiving the acquired electric potential variation, fitting the acquired electric potential variation using the predefined analy

Abstract: A local stimulation method of a predetermined region of brain tissue, the brain tissue including at least GABAergic neuron type. The method includes at least one activation step of a set of bipolar electrodes, according to a predetermined electric intensity and a predetermined biphasic pulse frequency, delivering a predetermined electric field. The predetermined electric field induces an activation of the GABAergic type neurons and a virtual absence of activation of other types of neurons.

Abstract: A method for cortex stimulation is disclosed which may include the steps of collecting electric signals by a control system from the cortex through an electrode array; determining signals by a virtual neural field having a virtual array corresponding the electrode array, the virtual array receiving the collected signals as an input and the virtual neural field being adapted to control the frequency spectrum of neural activity in the cortical target, each stimulation signal being determined by a value of the virtual potential at each point of the virtual array; and emitting the stimulation signals in the cortex through the electrode array.

Abstract: A method for cortex stimulation is disclosed which may include the steps of collecting electric signals by a control system from the cortex through an electrode array; determining signals by a virtual neural field having a virtual array corresponding the electrode array, the virtual array receiving the collected signals as an input and the virtual neural field being adapted to control the frequency spectrum of neural activity in the cortical target, each stimulation signal being determined by a value of the virtual potential at each point of the virtual array; and emitting the stimulation signals in the cortex through the electrode array.