This video from the Khan Academy on You Tube describes the anatomy of the neuron.
The Anatomy of a Neuron
Video Sep 12, 2017
A Mass. General Hospital study reveals how solid stress from nodular brain tumors compresses adjacent healthy tissue, restricts blood supply and damages neurons. The psychiatric drug lithium may be able to reduce these effects. (Giorgio Seano, PhD, Steele Laboratories of Tumor Biology, Department of Radiation Oncology, Massachusetts General Hospital)