He developed the sphygmomanometer and “scientific cradle” which was designed to measure the flow of blood while a person lay on his back in a prone position.

He employed the first scientific instrument to detect deception,

which was known as hydrosphygmograph, an instrument to measures changes in pulse and blood pressure when suspects were asked about their involvement in a particular offense.

He was accorded the distinction of being the first person to utilize an instrument for the purpose of detecting lies.

He was considered as the father of the modern polygraphy.

He conducted numerous test for detecting deception utilizing the changes in systolic blood pressure. He also favored the discontinuous method of reading systolic pressure.

He was by Italian Physiologist Galvani in 1791 to measure’s the person’s skin resistance to electricity by transmitting a constant minute electrical current through the skin.

An individual in criminology known to be the first person to apply the blood pressure pulse test in actual criminal suspects.

He was said to be the first person to use the term psychogalvanic reflex.

It is the housekeeping or braking system. It is responsible for conserving energy and ensuring necessary bodily functions. It restrains

It is a hormone secreted by the adrenal gland. It works alongside epinephrine/adrenaline to give the body sudden energy in times of stress, known as the “fight or flight" response.

It is a series of groups of nerve cells of the brain that control the entire endocrine-hormonal system

The instrument that pulled chart paper at a constant speed under recording pens from a roll of chart located inside the instrument.

In 1915, he employed it in an attempt to detect deception during questioning, using a standard blood pressure cuff and stethoscope.

He described how he recorded the subject's breathing pattern using a Marey pneumograph, noting the changes in inspiration-expiration ratio during deception.

It acts to constrict peripheral blood flow, raise blood pressure, increase cardiac activity, promote metabolic activity through the release of glucose, and inhibit digestive processes.