1. Muscles of Head and Neck GENERAL INFORMATION Innervated by the facial nerve Derivatives of the 2nd pharyngeal arch Insert into the skin to provide movement Most muscles of facial expression are localized around the facial orifices There is no deep fascia along the face Muscles of head and neck can be divided into 5 groups: -Oral -Nasal -Orbital -Auricular -Scalp -Neck

2. ORAL GROUP

7. Muscle of mastication

10. ORBITAL GROUP

13. NASAL GROUP

15. EAR GROUP Outside Inner

16. Outer muscles Inner muscles

17. SCALP GROUP

18. NECK GROUP Neck muscles can be divided into two parts suprahyoid and infrahyoid muscles.