4 aminopyridine 4-Aminopyridine Animals Attention deficit hyperactivity disorder Bicuculline Cerebral Cortex Convulsants D4 receptor Dopamine Dose-Response Relationship, Drug Drd4 protein, mouse Epilepsy Frontal cortex Glutamate Glutamic Acid Immunohistochemistry Membrane Potentials Mice Mice, Neurologic Mutants Motor Cortex Neural Inhibition Patch-Clamp Techniques Piperazines Presynaptic Terminals Pyramidal Cells Receptors, Dopamine D2 Receptors, Dopamine D4 Seizures Sulfonamides animal