: 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.
First, bend forward to stretch these back muscles. Hold the stretch by bending the arms, and then attempt to arch the back. This increases tension at the muscle-tendon junction of the erector spinae and quadratus lumborum, stimulates the Golgi tendon organs, and ultimately relaxes these muscles.o slowly with facilitated stretching. Allow about 48 hours of recovery time before re-applying PNF to any given muscle group. It is not necessary to use strong muscular contractions to experience the benefits of these techniques. Start with gentle force and learn to moderate the contraction, dialing it in.