Density (1) Treatment (1) Agonists (1) Inhibitors (1) Observations (1) Observations (1) Substantia nigra (1) Calcium channels (1) Tranquilizing drugs (1) Serotonin (1) Radio (1) Possibility (1) Pictures (1) Pharmacology (1) Neurotransmitters (1) Neurons (1) Neural transmission (1) Motion pictures (1) Memory (1) Ligands (1) Hypothesis (1) Hiking (1) Globus pallidus (1) GABA (1) Control theory (1) Clinics (1) Cinematography (1) Central nervous system (1) Carriers (1) Calcium (1)