Muscles of Facial Expression Flashcards
Name muscle A.
Occipitofrontalis muscle
Name muscle B.
Bucinator
Name muscle A.
Platysma
Name muscle B.
Orbicularis oris
Name muscle C.
Orbicularis oculi.
What is the origin of the occipital belly of the occipitofrontalis muscle?
Supreme nuchal line of occipital bone
What is the origin of the frontal belly of the occipitofrontalis muscle?
Epicranial aponeurosis
Describe the insertion of the occipital belly of the occipitofrontalis muscle.
Epricranial aponeurosis
What is the insertion of the frontal belly of the occipitofrontalis muscle?
Skin of eyebrows and root of nose.
Describe the action of the occipital belly of the occipitofrontalis muscle.
Draws scalp backwards.
Describe the action of the frontal belly of the occipitofrontalis muscle.
Raises eyebrows and wrinkles forehead.
Describe the innervation of the occipitofrontalis muscle.
Posterior auricular nerve and temporal branches of facial nerve.
Describe the blood supply of the occipitofrontalis muscle.
Superficial temporal artery, ophthalmic artery, posterior auricular, occipital arteries
Describe the origin of the bucinator.
Alveolar processes of maxilla and mandible, pterygomandibular raphe.
Describe the insertion of the bucinator.
Angle of the mouth
Describe the action of the bucinator.
Compresses cheeks
Describe the innervation of the bucinator.
Buccal branches of the facial nerve
Describe the blood supply of the bucinator.
Buccal artery
Describe the origin of the platysma.
Pectoral fascia
Describe the insertion of the platysma.
Inferior border of mandible and adjacent muscles
Describe the action of the platysma.
Tenses skin of neck; depresses mandible
Describe the innervation of the platysma.
Cervical branch of the facial nerve
Describe the blood supply of the platysma.
Submental and suprascapular arteries
Describe the origin of the orbicularis oris muscle.
Modiolus of angulus oris and vermillion line.
Describe the insertion of the orbicularis oris muscle.
Skin and fascia of lips.
Describe the action of the orbicularis oris muscle
Compresses and protrudes lips
Describe the innervation of the orbicularis oris muscle.
Buccal and marginal mandibular branches of facial nerve
Describe the blood supply of the buccinator
Superior and inferior labial, infraorbital and transverse facial arteries.
Describe the origin of the orbicularis oculi muscle.
Nasal part of frontal bone, frontal process of maxilla, medial palpebral ligament, posterior lacrimal crest of lacrimal bone.
Describe the insertion of the orbicularis oculi muscle
Lateral palpebral raphe, adjacent muscles and overlying subcutaneous tissue
Describe the action of the orbicularis oculi muscle.
Closes eyelids and compresses lacrimal sac,
Describe the innervation of the orbicularis oculi muscle.
Temporal and zygomatic branches of facial nerve.
Describe the blood supply of the orbicularis oculi muscle.
Facial, superficial temporal, maxillary, and ophthalmic arteries.
