Interstate vs Intrastate Interstate and intrastate are concepts that have great implications in business and transport. This is because of the fact that trucks that roam inside a state are governed by the laws of that state alone while intrastate trucks are allowed to go inside other states also thereby being governed by a different set of laws.
Pseudobulbar Affect: When You Can't Stop Laughing, or Crying. When David Diehl, a third-generation family farmer, became a paraplegic five days after an autoimmune condition attacked his spinal cord in 1991, he began driving his tractor and combine using rails and his hands.
A counter theory is that crying doesn't so much help the body recover from whatever triggered the tears, but that it increases arousal to encourage behaviours to see off the threat. In support of this theory, some research shows that skin sensitivity increases during and after crying, and that breathing deepens.