Nasal group muscles

Question 1

Nasalis - Transverse part

Answer 1

Origin - Maxilla just lateral to the nose
Insertion - Aponeurosis across dorsum of the nose with muscle fibres from the other side
Innervation - CNVII
Function - Compresses nasal aperture

Question 2

Nasalis - Alar part

Answer 2

Origin - maxilla over lateral incisor
Insertion - Alar cartilage of nose
Innervation - CNVII
Function - Draws cartilage downward and laterally opening nostrils

Question 3

Procerus

Answer 3

Origin - Nasal bone and upper part of lateral nasal cartilage
Insertion - Skin of lower forehead between eyebrows
Innervation - CNVII
Function - Draws down medial angle of eyebrows, producing wrinkles over bridge of nose

Question 4

Depressor septi

Answer 4

Origin - Maxilla above central incisor
Insertion - Mobile part of nasal septum
Innervation - CNVII
Funciton - pulls nose inferiorly