Disturbed Gabaergic transmission in hippocampus (Sterley et al., 2016) and in prefrontal cortex (Tzanoulinou et al., 2016) have been involved in ADHD neuropathophysiology. GABAergic inhibitory neurons play a role in the neurobiology of ADHD (Nagamitsu et al., 2015). GAD1 polymorphysm is associated with ADHD (Bruxel et al., 2016). The gene discussed is GAD1; the disease is attention deficit-hyperactivity disorder.