Neurons Controlling Sighing

A sigh may be a fundament thing of life, as time goes by, but here is an illustration of why a sigh is not just a sigh.   According to brain researchers at UCLA and Stanford “. . . sighs are a response to the lungs’ signal to inflate the alveoli, and originate from two tiny clusters of 200 neurons in the brain stem – the area also responsible for autonomic functions such as heart rate, breathing and sleeping. The researchers believe the sigh has the fewest number of neurons linked to any basic human behavior.” MORE

Image Credit: Krasnow Lab, Stanford and GizMag.com