Is there a name for the low wall that is often in front of a choir?

There's typically a low wall, about hip-high, in front of the first row of the choir. Religious architecture typically has its own terminology, and Christian architecture in particular. So is there a special name for that wall? Or is it just "that wall that keeps the first row of ladies from being embarrassed?" Alternately, is there a name for the low wall that's sometimes in front of the first row of the congregation?