Facial nerve paralysis. Facial nerve paralysis most commonly causes a unilateral, but sometimes bilateral, paralysis of the muscles responsible for facial expression. Patients often present unable to move the lip or blink and with a droopy ear and severe ptyalism.
The Fourth World is an extension of the Three-World Model, used variably to refer to. Sub-populations socially excluded from global society; Hunter-gatherer, nomadic, pastoral, and some subsistence farming peoples living beyond the modern industrial norm.
4th Grade redirects here. For the South Park episode, see 4th Grade (South Park). Fourth Grade (also called Grade Four or Year five in Britain) is a term used to refer to a year of elementary education in some countries. In North America, the fourth grade is the fifth school year of elementary school. Students are usually 9â10 years old, depending on their birthday.