Get all child in xml via powershell without named tag

I need in powershell load xml and show all name of nodes without set parent. Is it possible? Here my code:

    [xml]$changesXML = Get-Content $PathToXML
    function ReplaceOneFormat
    {
        Param(
            $Parent
        )
        foreach($child in $Parent)
        {
            $child.Name?
            #ReplaceOneFormat $child # call this function by recursive
        }
    }

    ReplaceOneFormat $changesXML