E. S. McGee

“In the 1830s, Professor Pierre Adolphe Piorry, the inventor of topographic percussion taught that there were nine distinct percussion sounds, which he used to outline the patient’s liver, heart, lungs, stomach, and even individual heart chambers or lung cavities.””

“For example, the speed of an elderly person’s gait accurately predicts falls, future disability, and risk of institutionalization.””

“presence of a gait disturbance makes Alzheimer disease less likely (especially if the gait disturbance appears early during the patient’s course;””