Muscles of facial expression Flashcards
Buccinator action
compresses cheeks
Buccinator attachments
P: mandible, alveolar processes, and pterygomandibular raphe
D: angle of mouth with orbicularis oris fibers
Corrugator supercilii action
draws eyebrows medially and inferiorly, creating vertical wrinkles
Corrugator supercilii attachments
P: medial end of superciliary arch
D: skin superior to middle of supraorbital margin and superciliary arch
Depressor anguli oris action
depresses corner of mouth
Depressor anguli oris attachments
P: base of mandible
D: angle of mouth
Depressor labii inferioris action
depresses lower lip
Depressor labii inferioris attachments
P: platysma and anterolateral body of mandible
D: skin of lower lip
Levator labii superioris action
elevates upper lip
Levator labii superioris attachments
P: lower margin of orbit, superior to infraorbital foramen
D: orbicularis oris
Levator anguli oris action
elevates corner of mouth
Levator anguli oris attachments
P: infra-orbital maxilla
D: angle of mouth
Levator labii superioris alaeque nasi action
elevates upper lip and dilates (flares) nostrils
Levator labii superioris alaeque nasi attachments
P: frontal process of maxilla
D: major alar cartilage
Mentalis action
elevates and protrudes lower lip
Mentalis attachments
P: body of mandible
D: skin of chin
Orbicularis oculi action
closes eyelids gently (palpebral part)/tightly (orbital part)
Orbicularis oculi attachments
P: medial orbital margin, lacrimal bone
D: skin around eyelids
Orbicularis oris action
compresses, purses lips
Orbicularis oris attachments
P: maxillary bone and mandible, angle of mouth
D: mucous membranes of lips
Risorius action
draws corner of mouth to side (to smile)
Risorius attachments
P: fascia surrounding parotid salivary gland
D: angle of mouth
Zygomaticus major action
raises corners of mouth–bilaterally to smile, unilaterally to sneer
muscle defect=dimples!
Zygomaticus major attachments
P: lateral aspect of zygomatic bone
D: angle of mouth
Zygomaticus minor action
draws upper lip backward, upward, and outward (sad facial expressions)
Zygomaticus minor attachments
P: anterior aspect of zygomatic bone
D: skin of upper lip
Auricularis superior action
slightly raises ear
Auricularis superior attachments
P: galea aponeurotica
D: upper cranial surface of auricula
Auricularis anterior action
draws auricula forward and upward
Auricularis anterior attachments
P: lateral edge of galea aponeurotica
D: front of helix of ear
Auricularis posterior action
draws auricula backward
Auricularis posterior attachments
P: mastoid portion of temporal bone
D: lower part of cranial surface of auricle
