Face and Scalp Flashcards
Identify a and b and provide actions
Occipitofrontalis
- a: frontalis: elevates eyebros and produces wrinkles on the forehead
- b: occipitalis: aids frontalis (by retracting scalp and aponeurosis)
Identify and give action
Orbicularis Oculi
- Black arrow: Palpebral portion: Gently closes eye
- Red arrow: Oribtal portion: Tightly closes eye
Identify and name action
Zygomaticus major
- Action: draws angle of mouth superolaterally; smiles
What muscle is responsible for increasing ridigity of cheek; keeping food between molars; and resisting distention
Buccinator m.
Identify and give action
Orbicularis Oris
- Resting activity (tonus) keeps mouth softly closed
- Constricts and Protrudes lips (kissing m!)
Satchmo’s syndrome
tearing of the orbicularis oris muscle
- common to brass players
Identify #1
Levator anguli oris m.
Identify “b” and name action
B: Levator anguli Superioris : elevates upper lip
Identify a and name action
depressor anguli oris
- Action: pouting hard
Identify c and give action
mentalis: wrinkles skin on chin
Identify green arrow and give action
Depressor Labii inferioris: draws lower lip down in frown
Which of the branches of the external carotid artery can be seen in the face?
- facial
- Maxillary
- Superficial temporal
Which branch off the internal carotid can be seen in face?
Branches off an Opthalmic a.
The maxillary a. (off external carotid) has 2 terminal branches that exit onto the surface of the face. What are they?
- mental a.
- infraorbital a.
The opthalmic artery (off internal carotid) has a branche in the face that anastomoses with a branch from the external carotid artery. Name them
- Supraorbital
- Anastomosis with the angular
The pterygoid plexus is connected to what sinus?
Cavernous sinus
List the lymphatics of the face
- Buccal nodes
- Parotid nodes
- Submental nodes
- Submandibular nodes
- Mastoid nodes
- Occipital nodes
Why is lip carcinoma more common on the lower lip?
Lower lip has dual lymphatic drainage
- Lateral: submandibular
- Central: submental
What nerves supply sensory innervation to the face?
Trigeminal CN V
- Ophthalmic (V1)
- Maxillary (V2)
- Mandibular (V3)
Spinal rami
- anterior
- posterior
What branches off of Ophthalmic (CN V1) provide sensory innervation to face?
- supraorbital
- supratrochlear
- external nasal
Bell’s palsy
facial nerve damage and paralysis of the muscles supplied by its motor branches
- eversion of lower eyelid
- drooping of angle of mouth
- inability to maintain saliva or food within oral cavity
The parotid gland delivers saliva to the oral cavity via what? What are its distinguishing factors?
- parotid duct
- crosses over masseter muscle and pierce buccinator muscle to enter oral cavity
Parotiditis
- Parotid sheath is continuous with the superficial layer of the deep cervical fascia
- swelling of gland is very painful and can compromise structures passing through
- Commonly seen in mumps
- Parasympathetic innervation to the parotid gland starts in what plexus?
- Where does it synapse?
- What nerve does the postganglionics hitchhike on to get to the parotid gland?
- Tympanic plexus off CN IX
- Otic ganglion
- auriculotemporal nerve (CN V3)
Name the vessels of the scalp. Name whether they come off of the internal or external carotid
External carotid
- occipital a.
- Posterior auricular a.
- Superficial temporal a.
Internal carotid
- Supraorbital
- Supratrochlear
Why do deep wounds in the scalp gape open?
tension in frontalis and occipitalis
Why is the loose connective tissue layer of the scalp considered the “danger” area?
Emissary veins can carry infection into cranial cavity
