: to spread by metastasis â¦ all ten were primary brain cancers; that is, they had originated in the brain, and not metastasized there from elsewhere in the body.âPaul Brodeur, The New Yorker, 9 July 1990.
PNF stretching, or proprioceptive neuromuscular facilitation stretching, is a set of stretching techniques commonly used in clinical environments to enhance both active and passive range of motion in order to improve motor performance and aid rehabilitation.uring the 1960s, the physical therapy departments of several universities began offering courses in PNF and by the late 1970s PNF stretching began to be used by athletes and other healthy people for more flexibility and range of motion.
What is PNF. Proprioceptive Neuromuscular Facilitation or PNF is a type of flexibility therapy. It is based on the principles of functional human anatomy and neurophysiology, Proprioceptive Neuromuscular Facilitation uses proprioceptive input to improve muscle flexibility and strength.Proprioceptors are sensory nerve-ending in muscles, tendons, and joints.enefits of PNF. Proprioceptive Neuromuscular Facilitation helps to improve muscle strength, increase endurance and improve coordination. It also results in the correction of muscular imbalances which results in increased holding power and promotes relaxation.