 There are many ways in which epilepsy occurs . Examples of pathological physiology include : unusual excitatory connections within the neuronal network of the brain ; abnormal neuron structure leading to altered current flow ; decreased inhibitory neurotransmitter synthesis ; ineffective receptors for inhibitory neurotransmitters ; insufficient breakdown of excitatory neurotransmitters leading to excess ; immature synapse development ; and impaired function of ionic channels . 
