 The functions of a Holter monitor captures and records information such as heart rates during day and night, abnormal heart beats, and normal and abnormal heart rhythms.The Holter monitor was invented by Norman Holter.1949 Crash test dummy

A crash test dummy is a full-scale anthropomorphic test device that simulates the dimensions, weight proportions and articulation of the human body, and is usually instrumented to record data about the dynamic behavior of the ATD in simulated vehicle impacts.