Key Points

• The nervous system consists of more than 20 billion neurons linked together in motor and sensory pathways with distinctive anatomic, biochemical, and electrophysiologic properties.

• The general anatomic organization of the nervous system evolves at early developmental stages, preceding that of most other organs and providing a mechanism for neuronal control over subsequent developmental events.

• The lumen of the neural tube expands during development to form a series of four interconnected ventricles that circulate cerebrospinal fluid through the internal regions of the brain.

• The peripheral nervous system is composed of groups of cell bodies organized within two types of ganglia: (1) sensory ganglia, located near the spinal cord or brain stem, and (2) autonomic motor ganglia, some of which are located near the muscle or gland to be innervated.

• Sensory pathways share common organizational motifs, with primary sensory cell bodies in sensory ganglia sending central processes through spinal cord/brain stem tracts to reach primary receiving areas in the cerebral cortex.

• Voluntary motor pathways from the cortex control movement of skeletal muscle; sympathetic and parasympathetic nuclei in the brain stem and spinal cord provide autonomic control of smooth muscles and glands; and short interconnected sensory/motor pathways in the spinal cord and brain stem coordinate subconscious reflexes.

Essential Medical Physiology, Third Edition

Psychology Of Weight Loss And Management

Psychology Of Weight Loss And Management

Get All The Support And Guidance You Need To Be A Success At The Psychology Of Weight Loss And Management. This Book Is One Of The Most Valuable Resources In The World When It Comes To Exploring How Your Brain Plays A Role In Weight Loss And Management.

Get My Free Ebook

Post a comment