Why emotional stress can impact body movement?

"This (study) is the first hard proof that strong emotions produce a response in brain areas concerned with movement," said lead researcher Laura Muzzarelli from Vita-Salute San Raffaele University in Milan, Italy. The findings give us "a possible explanation for some motor inhibition associated with emotional stress", she added. For the study, a group of Italian and Canadian researchers followed a selection of socially anxious and control group children from childhood to adolescence. The researchers tested 150 children who were between ages of eight to nine, for signs of social inhibition.