Face Face

Muscles of faceMuscles of face

►Eyelids Eyelids ►Mouth Mouth ►Nose Nose

Orbicularis oculi Orbicularis oculi

► 2 parts 2 parts

1.1. Palpebral – from medial palpebral Palpebral – from medial palpebral ligament to lateral palpebral raphae . ligament to lateral palpebral raphae . Some fibres into posterior lacrimal Some fibres into posterior lacrimal crest & lacrimal saccrest & lacrimal sac

2.2. Orbital – larger , attached to anterior Orbital – larger , attached to anterior lacrimal crest & frontal process of lacrimal crest & frontal process of maxilla. It forms concentric circles maxilla. It forms concentric circles

Actions Actions

► Palpebral fibres- Palpebral fibres- close lids gentlyclose lids gently

►Orbital part – lowers Orbital part – lowers the eyebrowthe eyebrow

► Together they close Together they close eyelids forciblyeyelids forcibly

Orbicularis orisOrbicularis oris

► Intrinsic fibres – Intrinsic fibres – from mandible & from mandible & maxilla near midline maxilla near midline . Deepest fibres. Deepest fibres

► Extrinsic fibres – Extrinsic fibres – form bulk , most form bulk , most come from come from buccinator . buccinator .

► Action – narrowing Action – narrowing of mouthof mouth

Buccinator Buccinator

►Thin flat rectangular muscleThin flat rectangular muscle►Origin – alveolar processes of maxilla Origin – alveolar processes of maxilla

and mandible opposite molar teeth , and mandible opposite molar teeth , pterygomandibular raphaepterygomandibular raphae

► Insertion – modiolus (knot of muscles Insertion – modiolus (knot of muscles lateral to angle of mouth , resp. for lateral to angle of mouth , resp. for dimples) dimples)

Actions Actions

►Accessory muscle of masticationAccessory muscle of mastication►Return bolus of food from cheek pouch Return bolus of food from cheek pouch

to molarsto molars► keeps the cheek taut so prevents it keeps the cheek taut so prevents it

from folding & get injured during from folding & get injured during chewingchewing

►Forcible expulsion of air from mouthForcible expulsion of air from mouth

Dilator muscles of mouth Dilator muscles of mouth

► Levator labii Levator labii superioris aleque nasiisuperioris aleque nasii

► Levator labii Levator labii superiorissuperioris

► Levator anguli orisLevator anguli oris► Zygomaticus minor & Zygomaticus minor &

majormajor► Depressor anguli orisDepressor anguli oris► Depressor labii Depressor labii

inferiorisinferioris

Depressor anguli orisDepressor anguli oris

Facial lacerationsFacial lacerations

►No deep fasciaNo deep fascia►Loose SC tissueLoose SC tissue►Lacerations gape widelyLacerations gape widely►Bruising & inflammation causes large Bruising & inflammation causes large

swellingsswellings►Wrinkles occur perpendicular to Wrinkles occur perpendicular to

muscle fibresmuscle fibres

Paralysis of facial musclesParalysis of facial muscles

► Injury to 7 nerve Injury to 7 nerve

Arterial supplyArterial supply

►Facial a. – superior & inferior labial a. , Facial a. – superior & inferior labial a. , lateral nasal a. , angular a. lateral nasal a. , angular a.

►Superficial temporal a. – gives Superficial temporal a. – gives transverse facial a. transverse facial a.

►Supra orbital & supra trochlear a. - Supra orbital & supra trochlear a. - branches of ophthalmic a. branches of ophthalmic a.

Veins of faceVeins of face

►Supra orbital & supra trochlear veins Supra orbital & supra trochlear veins join & form angular v. , continues as join & form angular v. , continues as facial v. facial v.

►Retromandibular v.- formed by joining Retromandibular v.- formed by joining of superficial temporal v. & max. v. of superficial temporal v. & max. v.

►Dangerous area of faceDangerous area of face

The EndThe End