Fig. 4
From: Peripheral electrical stimulation to reduce pathological tremor: a review
a The tremorgenic input is generated by a central brain oscillator and projected to the motor neuron pools monosynaptically via the corticospinal tract and disynaptically via interneurons. Several strategies to reduce tremors have been proposed: b functional electrical stimulation on the nerve or the muscle belly to elicit antagonist muscle forces and increase the joint impedance, c stimulation of Ia afferent fibers to decrease the excitability of the antagonist pool of motor neurons and alter the transmission of the tremorgenic input, and d stimulation of cutaneous afferent fibers to inhibit the interneurons and alter the disynaptic transmission of the tremorgenic input