In a classic experiment conducted by Cannon and Washburn (1912), they monitored stomach contractions and found them to be related to hunger.
What is stomach contraction?
Stomach, intestines, or abdominal muscles can constrict during a stomach spasm.
It may feel like a tiny muscle twitch or stomach cramps, depending on which area of your body is spasming and how severely.
Food is moved through the digestive tract by a sequence of wave-like muscle contractions called peristalsis.
The process begins in the esophagus, where powerful waves of smooth muscle transport balls of swallowed food to the stomach.
Primarily, hunger is a biologically induced urge for food, which is necessary for survival.
So, it is possible to think of hunger as a biological characteristic of humans that can be measured and predicted in terms of appetite and food consumption.
Nerve cells located in the hypothalamus are what cause the feeling of hunger when they are active.
