This is the second edition of an introductory clinical neurology textbook written for students, hospital medical officers, neurologists in training, non-neurologist's and those that teach them. It contains the principles of clinical neurology that were relevant 100 years ago and will still be relevant in 100 years. It contains novel approaches to clinical neurology. The nervous system is likened to a map grid with meridians of longitude (the two ascending sensory and the one descending mot...