Muscles of Facial Expression Flashcards
Occipitofrontalis frontal belly proximal attachment
Epicranial aponeurosis
Occipitofrontalis frontal belly distal attachment
Skin and subcutaneous tissue of eyebrows and forehead
Occipitofrontalis frontal belly action
Elevates eyebrows and wrinkles skin of forehead; protracts scalp
Occipitofrontalis occipital belly proximal attachment
Lateral 2/3 of superior nuchal line
Occipitofrontalis occipital belly distal attachment
Epicranial aponeurosis
Occipitfrontalis occipital belly action
retracts scalp; increasing effectiveness of frontal belly
Orbicularis oculi proximal attachment
medial orbital margin; medial palpebral ligament; lacrimal bone
Orbicularis oculi distal attachment
Skin around margin of orbit; superior and inferior tarsal plates
Orbicularis oculi action
Closes eyelids: palpebral part does so gently; orbital part tightly (winking)
Corrugator supercilli proximal attachment
Medial end of supercilliary arch
Corrugator supercilli distal attachment
Skin superior to middle of supraorbital margin and superciliary arch
Corrugator supercilli action
Draws eyebrow medially and inferiorly, creating vertical wrinkles above nose
Procerus proximal attachment
Fascia aponeurosis covering nasal bone and lateral nasal cartilage
Procerus distal attachment
Skin of inferior forehead between eyebrows
Procerus action
Depresses medial end of eyebrow; wrinkles skin over dorsum of nose
Levator labii superioris proximal attachment
Infraorbital margin (maxilla)
Lavator labii superioris distal attachment
Skin of upper lip
Levator labii superioris action
Part of dilators of mouth; retract (elevate) and/or evert upper lip; deepen nasolabial sulcus
Zygomaticus minor action
Part of dilators of mouth; retract (elevate) and/or evert upper lip; deepen nasolabial sulcus
Zygomaticus minor proximal attachment
Anterior aspect, zygomatic bone
Zygomaticus minor distal attachment
Skin of upper lip
Buccinator action
Presses cheek against molar teeth; resists distension when blowing
Buccinator proximal attachment
Mandible, alveolar process of maxilla and mandible, pterygomandibular raphe
Buccinator distal attachment
Angle of mouth; orbicularis oris
Zygomaticus major action
Part of dilators of the mouth; elevate labial commissure- bilaterally to smile; unilaterally to sneer
Zygomaticus major proximal attachment
Lateral aspect of zygomatic bone
Zygomaticus major distal attachment
Angle of mouth
Levator anguli oris action
Part of dilators of the mouth; elevate labial commissure- bilaterally to smile; unilaterally to sneer
Levator anguli oris proximal attachment
Infraorbital maxilla (canine fossa)
Levator anguli oris distal attachment
Angle of mouth
Risorius action
Part of dilators of mouth; widens rima oris, as when grinning
Risorius proximal attachment
Parotid fascia and buccal skin
Risorius distal attachment
Angle of the mouth
Depressor anguli oris action
Part of dilators of mouth; depresses labial commissure bilaterally to frown
Depressor anguli oris proximal attachment
Anterolateral base of mandible
Depressor anguli oris distal attachment
Angle of mouth
Depressor labii inferioris action
Part of dilators of mouth; retracts and/or everts lower lip
Depressor labii inferioris proximal attachment
Platysma and anterolateral body of mandible
Depressor labii inferioris distal attachment
Skin of lower lip
Mentalis action
Elevates and protrudes lower lip; elevates skin of chin
Mentalis proximal attachment
Body of mandible (anterior to roots of inferior incisors)
Mentalis distal attachment
Skin of chin
Platysma action
Depresses mandible; tenses skin of inferior face and neck
Platysma proximal attachment
Subcutaneous tissue of infraclavicular and supraclavicular regions
Platysma distal attachment
Base of mandible; skin of cheek and lower lip; angle of mouth; orbicularis oris