Oh, you didn't need to change it if it was fine.
I just wanted to know if there was a difference between the two nouns (since their Italian descendants "mano" and "palma" don't mean the same thing).
However they sometimes have got the same meaning and may replace each other, especially when some phrases are concerned, e.g.
-palmis suspensis/ manibus suspensis (with hands raised)
-habens palmas/manus in coelum erectas (having hands erected towards heavens),
-palmis/manibus capere (to catch, to seize with hands) etc.