What is a yv advancement flap of the hamstring muscles?

flap, V-Y, n a flap in which the incision is shaped like a V and after closure like a Y, to lengthen a localized area of tissue. See also flap, Y-V.

flap, Y-V, n a flap in which the incision is shaped like a Y and after closure like a V, to shorten a localized area of tissue. See also flap, V-Y.