Attention deficit hyperactivity disorder 4 aminopyridine 2 4-Aminopyridine 2 Animals 2 Bicuculline 2 Biomedical engineering 2 Cerebral Cortex 2 Convulsants 2 D4 receptor 2 Diseases 2 Dopamine 2 Dose-Response Relationship, Drug 2 Drd4 protein, mouse 2 Epilepsy 2 Frontal cortex 2 Glutamate 2 Glutamic Acid 2 Immunohistochemistry 2 Low resolution brain electromagnetic tomographies 2 Membrane Potentials 2 Mice 2 Mice, Neurologic Mutants 2 Motor Cortex 2 Neural Inhibition 2 Neural activity 2 Neurons 2 Patch-Clamp Techniques 2 Piperazines 2 Presynaptic Terminals 2 Pyramidal Cells 2