This course explores how synaptic communication in the brain shapes movement, mood, anxiety, and sleep, with a strong emphasis on pharmacological principles and real-world clinical applications. Learners will examine how specific neurotransmitter systems—including dopamine, GABA, and serotonin—regulate neural circuits and behavior, and how disruptions in these systems contribute to common neurological and psychiatric disorders.

Using Parkinson’s disease as a central example, the course investigates the dopaminergic synapse and how molecular changes in dopamine signaling alter motor control. Learners will explore the mechanism of action of L-DOPA, examine alternative therapeutic strategies, and consider patient perspectives on treatments such as deep brain stimulation. The course then turns to anxiety and insomnia, highlighting inhibitory GABA synapses and explaining how benzodiazepines and Z-drugs enhance the brain’s natural braking systems to reduce symptoms and promote sleep. Finally, learners will examine depression through the amine hypothesis, studying how antidepressants such as tricyclics and selective serotonin reuptake inhibitors modify neurotransmitter signaling, as well as emerging treatments such as ketamine. Throughout the course, molecular mechanisms are linked to neural circuits, behavior, and lived patient experiences. This course provides a strong foundation for learners interested in neuroscience, pharmacology, psychology, medicine, and related health sciences.