Fig. (1) Scheme of the events in the sensory coding in the vestibular end-organs. Accelerations constitute the input to the system. Mechanical coupling determines the type of effective stimuli (angular or linear accelerations). Cilia deflection activates the mechanoelectrical transduction process and hair cell response in the form of a receptor potential, which determines the neurotransmitter release. subsequently the postsynaptic activation of afferent neurons activates the encoder mechanism and spike discharge pattern in the afferent neuron.