Muscles of Head and NeckGENERAL 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

ORAL GROUP

Muscle of mastication

ORBITAL GROUP

NASAL GROUP

EAR GROUP

Outside

Inner

Outer muscles

Inner muscles

SCALP GROUP

NECK GROUP

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