PSY 2210 Lecture Notes - Lecture 1: Central Nervous System, Myasthenia Gravis, Peripheral Nervous System

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Introduction case study: myasthenia gravis: "grave muscle weakness," trouble breathing, lifting arms above head, extreme fatigue autoimmune disease. The nervous system: an overview: central nervous system (cns): brain and spinal cord, parts encased by bones of the skull and spinal column. Communicates with the rest of the body through nerves, bundles of thousands of individual neurons, all wrapped in a tough, protective membrane. Interneurons lie entirely within the cns, preform tasks such as perceiving, learning, remembering, deciding, and controlling complex behaviors. Local interneurons form circuits with nearby neurons and analyze small pieces of information. Relay interneurons connect circuits of local interneurons in one region of the brain with those in other regions: peripheral nervous system (pns): nerves and most of the sensory organs. Specialized cells of the pns, sensory neurons, gather information in the form of light, sound waves, odors, tastes, or contact with objects.

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