The movements of the nose are affected by.

http://en.wikipedia.org/wiki/Anatomy_of_the_human_nose

1. the elevator muscle group — which includes the procerus muscle and the levator labii superioris alaeque nasi muscle.
2. the depressor muscle group — which includes the alar nasalis muscle and the depressor septi nasi muscle.
3. the compressor muscle group — which includes the transverse nasalis muscle.
4. the dilator muscle group — which includes the dilator naris muscle that expands the nostrils; it is in two parts: (i) the dilator nasi anterior muscle, and (ii) the dilator nasi posterior muscle.