Temporal Region And Orbit Flashcards
Temporal region boundaries
Superior: Superior temporal line
Anterior: Frontal process zygomatic bone
Inferior: Zygomatic arch
Temporal region contents
- Tempralis
- Deep temporal branch V3
- Deep temporal branch of Maxilary Aa
- Auriculotemporal nerve
- Superficial temporal arch ECA
Infratemporal fossa contents
- Lower border temporalis
- Lateral/medial Pterygoid
- Maxillary aa
- Maxillary nerve
- Mandibular nerve
- Optic Ganglion
Pterygoid Latina fossa contents
- Maxillary n.
- Maxillary aa
- Pterygopalatine ganglion
What are the branches of CN V2?
- Meningeal branch
- Communicating branch to pterygopalatine ganglion
- Superior alveolar
- Zygomatic
Where does the maxillary artery end?
Sphenopalatine (Mucous membrane of nasal cavity and septum
How does the Maxillary vein terminate?
Joins the superficial enteral vein in the Parotid gland to form the retromandibular vein
What forms the roof of the orbit?
Lesser wing Sphenoid
Frontal bone
What forms the Lateral Wall Orbit?
Zygomatic process frontal bone
Greater Wing Sphenoid
brutal surface Zygomatic
Inferior Orbital fissure
What forms Medial wall of Orbit
Frontal Process Maxilla
Lacrimal Bone
Lateral mass of ethmoid
What forms floor of Orbit?
Perpendicular plate Palatine Bone
Orbital surface Maxilla
Zygomatic bone
What is a Blowout fracture?
Indirect ramus which displaces the orbital walls of the orbit
Exophthalmos
Orbital fracture causes Infraorbital bleeding and pressure which pushes on Eyeball
Periorbital Ecchymosis
Direct blow toperiorbital region causing swelling and hemorrhage into eyelids and extravasation of blood into periorbital skin
What maintains the shape and rigidity of the eyelids?
Tarsal plates
What originates and inserts onto the medial palpebral ligament?
Orbicularis Oculi
What attaches to the lateral palpebral ligament?
Nothing
Innervation of upper vs lower eyelid
Sensory
Upper - CN V1
Lower CN V2
Motor
CN VII Orbicularis Oculi
CN III Levator Palpebrae Superioris
Sty
Chalazia
Chalazion
Sty - Obstruction of ciliary gland (Of Zeus) causing painful, suppurations swelling
Chalazia - Cyst Of sebaceous gland of eyelids
Chalazion - Obstruction of tarsal glands which produce inflammation which protrudes and ribs cornea
Sub conjunctival Hemorrhage
- Bright/dark red patches deep to and in bulbar conjunctiva
- caused by Direct blow to eye, excessive blowing of nose, PAROXYSM of coughing, or violent sneezing
Damage to which CN results in ptosis?
CN III Oculomotor —> Levator Palpebrae superiorus
What occurs due to CN VII damage to eyes?
Inability to voluntarily close eyelids tightly and lower eyelid droops (Ectropy) and spillage of tears (Epiphora)
Where does the nasolacrimal duct drain?
Into the inferior nasal meatus
Optic Papilla Disc
slightly elevated region posterior to the eye, just medial to the posterior pole
✧Site at which the optic nerve exits. It
contains no photoreceptors - it is a “blind
spot” ✧The branches of the central retinal vessels
radiate out from the optic papilla. ✧The retina is most adherent to the optic
papilla.
