Skull and Facial Muscles

• Frontalis muscle

Origin:
          Epicranial aponeurosis

Insertion:
          Supra orbital margin

Function:
          Raises the upper eyelids, and wrinkles the skin of the forehead

• Occipitalis muscle

Origin:
          Posterior margin of the occipital bone and mastoid process of temporal bone

Insertion:
          Epicranial aponeurosis

Function:
          Draws skin of the scalp backward

Facial Muscles

• Orbicularis oris muscle

Origin:
          Upper and lower margins of lips

Insertion:
          Angle of the mouth

Function:
          Closes the mouth

• Orbicularis oculi muscle

Origin:
          Upper and lower margins of the orbit

Insertion:
          Angle of the orbits

Function:
          Closes the eye

• Zygomatic major muscle

Origin:
          Zygomatic bone

Insertion:
          Angle of the mouth

Function:
          Raises the upper lip

• Zygomatic minor muscle

Origin:
          Zygomatic bone

Insertion:
          Lower lip

Function:
          Depression of lower lip

• Levator labii superioris muscle

Origin:
          Upper lip

Insertion:
          Angle of the mouth

Function:
          Raises the upper lip

• Depressor labii inferioris muscle

Origin:
          Lower lip

Insertion:
          Angle of the mouth

Function:
          Depression of lower lip

• Levator palpebrii superioris muscle

Origin:
          Roof of the orbit and lesser wing of the sphenoid bone

Insertion:
          Skin of the superior eyelid

Function:
          Elevates the upper eyelid

• Buccinator muscle

Origin:
          Alveolar processes of maxillae and mandible

Insertion:
          Upper and lower lips

Function:
          Approximation of upper and lower lips as in ‘whistling’

• Risorius muscle

Origin:
          Fascia over the parotid gland

Insertion:
          Lower lip

Function:
            Draw the mouth backward

• Mentalis muscle

Origin:
          Angle of mandible

Insertion:
          Mental foramen

Function:
          Movement of mandible

• Corrigurator supercilli muscle

Origin:
          Medial side of supra orbital margin

Insertion:
          Eyebrow

Function:
          Movement of eyebrow