Neurostimulators and stimulation systems

Abstract

In accordance with the present invention, various embodiments of neurostimulators and stimulation systems are disclosed that provide different shapes and patterns of stimulus pulses and trains of pulses with fixed and no fixed frequencies. The neurostimulator can be configured to provide high frequency stimulation and also be implantable in the head or neck regions in order to stimulate nerves and nerve ganglions in the head and neck regions and also stimulate the brain.

What is claimed is: 
     
         1 . An implantable neurostimulator comprising:
 an electrical circuit capable of delivering, through at least one electrode contact, a train of electrical stimuli that has at least n number of stimuli, wherein n is 3 or a greater whole number, such that each stimulus is represented by N 1 , N 2 , . . . , N-Last in one time window,   wherein the train of stimuli does not have a fixed frequency but the frequency is variable as measured between the time duration between N 1  and N 2  compared to the time duration between N 2  and N 3 ,   wherein the duration between adjacent stimuli is entirely randomized with no fixed frequency, and wherein the total number of stimuli N 1 , N 2 , N-Last occurring in the time window is selected through software programming resident in the neurostimulator.