 Damage to both these areas in people with ADHD seems to illustrate why they exhibit inattentiveness and impulsiveness.Nucleus accumbens neurons are bistable and thus can be selectively gated to either an "up" – depolarized state or a "down" – hyperpolarized state.Nucleus accumbens neurons are gated by hippocampal and amygdala input and this creates a depolarized accumbens neuron that is more receptive to innervation from input from the prefrontal cortex.